Question 1: Palette 1/253

JEE Mains 2026 MCQ

The correct order of acidic strength of the major products formed in the given reactions, is :

A. $\mathrm{PhNH}_2 \xrightarrow[\substack{\text { (2) } \mathrm{CuCN}^2 \\ \text { (3) } \mathrm{H}_3 \mathrm{O}^{+} / \Delta}]{\text { (1) } \mathrm{NaNO}_2+\mathrm{HCl}\left(<5^{\circ} \mathrm{C}\right)}[\mathrm{A}]$

B. $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CHO} \xrightarrow[ \Delta]{\left[\mathrm{Ag}\left(\mathrm{NH}_3\right)_2\right]^{+}, \mathrm{OH}^{-}}[\mathrm{B}]$

C. $\mathrm{CH}_4+\mathrm{O}_2 \xrightarrow[\text { (ii) } \mathrm{Na}_2 \mathrm{Cr}_2 \mathrm{O}_7 / \mathrm{H}^{+}]{\text {(i) } \mathrm{Mo}_2 \mathrm{O}_3}[\mathrm{C}]$

D. $\mathrm{PhCH}_2 \mathrm{MgBr}+\mathrm{CO}_2 \xrightarrow[\mathrm{H}_3 \mathrm{O}^{+}]{\text {Dry ether }}[\mathrm{D}]$

Choose the correct answer from the options given below :

A

C > A > D > B

B

A > D > C > B

C

A > D > B > C

D

C > B > A > D

Question 2: Palette 2/253

JEE Mains 2026 MCQ

Which of the following reaction is NOT correctly represented?

A

B

C

D

Question 3: Palette 3/253

JEE Mains 2026 MCQ

$ \text { Given below are two statements for the following reaction sequence. } $

Statement I : Compound ' $Z$ ' will give yellow precipitate with NaOI .

Statement II : Compound ' Q ' has two different types of ' H ' atoms (aromatic : aliphatic) in the ratio $1: 3$.

In the light of the above statements, choose the correct answer from the options given below :

A

Statement I is true but Statement II is false

B

Both Statement I and Statement II are true

C

Statement I is false but Statement II is true

D

Both Statement I and Statement II are false

Question 4: Palette 4/253

JEE Mains 2026 MCQ

$ \text { Given below are the four isomeric compounds }(\mathrm{P}, \mathrm{Q}, \mathrm{R}, \mathrm{~S}) $

Identify correct statements from below.

A. $\mathrm{Q}, \mathrm{R}$ and S will give precipitate with 2, 4-DNP.

B. $P$ and $Q$ will give positive Bayer's test.

C. Q and R will give sooty flame.

D. R and S will give yellow precipitate with $\mathrm{I}_2 / \mathrm{NaOH}$.

E. Q alone will deposit silver with Tollen's reagent

Choose the correct option.

A

C and E only

B

A and E only

C

A, B, D and E only

D

A, C and E only

Question 5: Palette 5/253

JEE Mains 2026 MCQ

The unsaturated ether on acidic hydrolysis produces carbonyl compounds as shown below :-

Based on this, predict the solution/reagent that will help to distinguish "P" and "Q" obtained in the following reaction :-

A

Saturated $\mathrm{NaHSO}_3$ solution

B

Fehling solution

C

Lucas reagent

D

2, 4 - DNP reagent

Question 6: Palette 6/253

JEE Mains 2026 MCQ

Given below are two statements :

Statement I : Cross aldol condensation between two different aldehydes will always produce four different products.

Statement II : When semicarbazide reacts with a mixture of benzaldehyde and acetophenone under optimum pH , it forms a condensation product with acetophenone only.

In the light of the above statements, choose the correct answer from the options given below

A

Statement I is true but Statement II is false

B

Both Statement I and Statement II are false

C

Both Statement I and Statement II are true

D

Statement I is false but Statement II is true

Question 7: Palette 7/253

JEE Mains 2026 MCQ

$ \text { Consider the following two reactions } \mathrm{A} \text { and } \mathrm{B} \text {. } $

Numerical value of [molar mass of $x+$ molar mass of $y$ ] is $\_\_\_\_$

A

46

B

160

C

88

D

4

Question 8: Palette 8/253

JEE Mains 2026 MCQ

A student is given one compound among the following compounds that gives positive test with Tollen's reagent.

The compound is :

A

B

B

D

C

A

D

C

Question 9: Palette 9/253

JEE Mains 2026 MCQ

Which of the following statements are TRUE about Haloform reaction?

A. Sodium hypochlorite reacts with KI to give KOI .

B. KOI is a reducing agent.

C. $\alpha, \beta$-unsaturated methylketone will give iodoform reaction.

D. Isopropyl alcohol will not give iodoform test.

E. Methanoic acid will give positive iodoform test.

Choose the correct answer from the options given below :

A

A, B & C Only

B

A, C & E Only

C

B, D & E Only

D

A & C Only

Question 10: Palette 10/253

JEE Mains 2026 MCQ

$ \text { Identify (P) } $

A

B

C

D

Question 11: Palette 11/253

JEE Mains 2026 MCQ

Iodoform test can differentiate between

A. Methanol and Ethanol

B. $\mathrm{CH}_3 \mathrm{COOH}$ and $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{COOH}$

C. Cyclohexene and cyclohexanone

D. Diethyl ether and Pentan-3-one

E. Anisole and acetone

Choose the correct answer from the options given below :

A

A, B & E Only

B

A & D Only

C

A & E Only

D

B, C & E Only

Question 12: Palette 12/253

JEE Mains 2026 MCQ

' $x$ ' is the product which is obtained from propanenitrile and stannous chloride in the presence of hydrochloric acid followed by hydrolysis. ' $y$ ' is the product which is obtained from the but-2-ene by the ozonolysis followed by hydrolysis. From the following, which product is not obtained when one mole of ' $x$ ' and one mole of ' $y$ ' react with each other in the presence of alkali followed by heating?

A

2-Methylpent-2-enal

B

2-Methylbut-2-enal

C

3-Methylbut-2-enal

D

Pent-2-enal

Question 13: Palette 13/253

JEE Mains 2026 MCQ

From the given following (A to D) cyclic structures, those which will not react with Tollen's reagent are:

A

A and D

B

A and B

C

B and D

D

B and C

Question 14: Palette 14/253

JEE Mains 2026 MCQ

The correct sequence of reagents for the above conversion of X to Y is :

A

(i) $\mathrm{NaOH}(\mathrm{aq})$

(ii) Jones reagent

(iii) $\mathrm{H}_3 \mathrm{O}^{+}$

B

(i) NaOEt

(ii) $\mathrm{B}_2 \mathrm{H}_6 / \mathrm{H}_2 \mathrm{O}_2$

(iii) Jones reagent

C

(i) Jones reagent

(ii) NaOEt

(iii) $\mathrm{Hot}\, \mathrm{KMnO}_4 / \mathrm{KOH}$

D

(i) $\mathrm{B}_2 \mathrm{H}_6 / \mathrm{H}_2 \mathrm{O}_2$

(ii) NaOEt

(iii) Jones reagent

Question 15: Palette 15/253

JEE Mains 2026 MCQ

$ \text { Compound ' } \mathrm{P} \text { ' undergoes the following sequence of reactions : } $

$ ' \mathrm{P}^{\prime} \text { is : } $

A

B

C

D

Question 16: Palette 16/253

JEE Mains 2026 MCQ

The compound $\mathrm{A}, \mathrm{C}_8 \mathrm{H}_8 \mathrm{O}_2$ reacts with acetophenone to form a single product via cross-Aldol condensation. The compound A on reaction with conc. NaOH forms a substituted benzyl alcohol as one of the two products. The compound A is :

A

2-hydroxy acetophenone

B

4-hydroxy benzylaldehyde

C

4-methyl benzoic acid

D

4-methoxy benzaldehyde

Question 17: Palette 17/253

JEE Mains 2026 MCQ

$ \text { Match the LIST-I with LIST-II } $

List-I Reagents		List-II Name of Reaction involving carbonyl compounds
A.	${}_{}$ <mrow data-mjx-texclass="ORD"> <mi data-mjx-auto-op="false">NH</mi> </mrow> <mn>2</mn> − <mrow data-mjx-texclass="ORD"> <mi data-mjx-auto-op="false">NH</mi> </mrow> <mn>2</mn> , <mi data-mjx-auto-op="false">KOH</mi> ${}_{}$ <mrow data-mjx-texclass="ORD"> <mi data-mjx-auto-op="false">NH</mi> </mrow> <mn>2</mn> − <mrow data-mjx-texclass="ORD"> <mi data-mjx-auto-op="false">NH</mi> </mrow> <mn>2</mn> , <mi data-mjx-auto-op="false">KOH</mi> NH_(2)-NH_(2),KOH	I.	Tollen's Test
B.	$$ <mi data-mjx-auto-op="false">Ag</mi> <mrow data-mjx-texclass="INNER"> <mo data-mjx-texclass="OPEN">(</mo> <msub> <mrow data-mjx-texclass="ORD"> <mi data-mjx-auto-op="false">NH</mi> </mrow> <mn>3</mn> </msub> <mo data-mjx-texclass="CLOSE">)</mo> </mrow> <mn>2</mn> <mi data-mjx-auto-op="false">OH</mi> $$ <mi data-mjx-auto-op="false">Ag</mi> <mfenced open="(" branch_open="(" close=")" branch_close=")" separators="|"> <mrow> <msub> <mrow data-mjx-texclass="ORD"> <mi data-mjx-auto-op="false">NH</mi> </mrow> <mn>3</mn> </msub> </mrow> </mfenced> <mn>2</mn> <mi data-mjx-auto-op="false">OH</mi> Ag(NH_(3))_(2)OH	II.	Clemmensen Reduction
C.	Aq. ${}_{}$ <mrow data-mjx-texclass="ORD"> <mi data-mjx-auto-op="false">CuSO</mi> </mrow> <mn>4</mn> ${}_{}$ <mrow data-mjx-texclass="ORD"> <mi data-mjx-auto-op="false">CuSO</mi> </mrow> <mn>4</mn> CuSO_(4), Sodium Potassium tartarate, KOH	III.	Wolff - Kishner Reduction
D.	$$ <mi data-mjx-auto-op="false">Zn</mi> − <mi data-mjx-auto-op="false">Hg</mi> , <mi data-mjx-auto-op="false">HCl</mi> $$ <mi data-mjx-auto-op="false">Zn</mi> − <mi data-mjx-auto-op="false">Hg</mi> , <mi data-mjx-auto-op="false">HCl</mi> Zn-Hg,HCl	IV.	Fehling's Test

Choose the correct answer from the options given below :

A

A-IV, B-III, C-II, D-I

B

A-III, B-I, C-IV, D-II

C

A-II, B-I, C-IV, D-III

D

A-III, B-IV, C-I, D-II

Question 18: Palette 18/253

JEE Mains 2026 MCQ

Match List - I with List - II.

List – I Reagents	List – II Reaction Name (Involving aldehydes)
A.  H2, Pd–BaSO4 B.  SnCl2, HCl C.  CrO2Cl2, CS2 D.  CO, HCl, Anhyd. AlCl3	I.  Etard Reaction II.  Rosenmund Reduction III.  Gattermann–Koch Reaction IV.  Stephen Reaction

Choose the correct answer from the options given below :

A

A-II, B-III, C-IV, D-I

B

A-IV, B-III, C-I, D-II

C

A-IV, B-I, C-II, D-III

D

A-II, B-IV, C-I, D-III

Question 19: Palette 19/253

JEE Mains 2026 MCQ

Statement I : Compound (X), shown below, dissolves in NaHCO₃ solution and has two chiral carbon atoms

Statement II : Compound (Y), shown below, has two carbons with sp³ hybridization, one carbon with sp² and one carbon with sp hybridization

In the light of the above statements, choose the correct answer from the options given below :

A

Statement I is true but Statement II is false

B

Both Statement I and Statement II are true

C

Both Statement I and Statement II are false

D

Statement I is false but Statement II is true

Question 20: Palette 20/253

JEE Mains 2026 MCQ

An organic compound " P " of molecular formula $\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_3$ gives positive Iodoform test but negative Tollen's test. When " P " is treated with dilute acid, it produces " Q ". " Q " gives positive Tollen's test and also iodoform test. The structure of " P " is :

A

B

C

D

Question 21: Palette 21/253

JEE Mains 2026 MCQ

$ \text { Identify A in the following reaction. } $

A

B

C

D

Question 22: Palette 22/253

JEE Mains 2026 MCQ

$ \text { Consider the following reaction. } $

$ \text { The major product }(\mathrm{P}) \text { formed is : } $

A

B

C

D

Question 23: Palette 23/253

JEE Mains 2026 MCQ

' $x$ ' is the product which is obtained by the hydrolysis of prop-1-yne in the presence of mercuric sulphate under dilute acidic medium at 333 K . ' $y$ ' is the product which is obtained by the reaction of ethane nitrile with methyl magnesium bromide in dry ether followed by hydrolysis. IUPAC name of product obtained from ' $x^{\prime}$ and ' $y$ ' in the presence of barium hydroxide followed by heating is :

A

2 - Methylpent-4-en-3-one

B

4-Methylpent-3-en-2-one

C

4-Methylpent-1-ene

D

2-Methylpent-3-one

Question 24: Palette 24/253

JEE Mains 2026 MCQ

An optically active alkyl bromide $\mathrm{C}_4 \mathrm{H}_9 \mathrm{Br}$, reacts with ethanolic KOH to form major compound $[\mathrm{A}]$ which reacts with bromine to give compound $[\mathrm{B}]$. Compound $[\mathrm{B}]$ reacts with ethanolic KOH and sodamide to give compound [C]. One molecule of water adds to compound [C] on warming with mercuric sulphate and dilute sulphuric acid at 333 K to form compound [D]. The functional group in compound D will be confirmed by :

A

Haloform test

B

Lucas test

C

Silver mirror test

D

Benedict test

Question 25: Palette 25/253

JEE Mains 2026 MCQ

Given below are two statements :

Statement I : 2, 6-diethylcyclohexanone and 6-methyl-2-n-propylcyclohexanone are metamers.

Statement II : 2, 2, 6, 6 - tetramethylcyclohexanone exhibits keto-enol tautomerism.

In the light of the above statements, choose the correct answer from the options given below

A

Both Statement I and Statement II are true

B

Both Statement I and Statement II are false

C

Statement I is true but Statement II is false

D

Statement I is false but Statement II is true

Question 26: Palette 26/253

JEE Mains 2026 MCQ

$ \text { Complete the following reaction sequence and give the name of major product ' } \mathrm{P} \text { '. } $

A

2-Chloropropanoic acid

B

3-Chloropropanoic acid

C

1-Chloropropane

D

2-Chloropropane

Question 27: Palette 27/253

JEE Mains 2026 MCQ

Given below are two statements:

Statement I: The condensation reaction between $\mathrm{CH_3-CH=O}$ and
under optimum pH will produce

Statement II: The molecule, will generate $\mathrm{Ph-CH=O}$ in the presence of dilute acid.

In the light of the above statements, choose the correct answer from the options given below:

A

Both Statement I and Statement II are true

B

Both Statement I and Statement II are false

C

Statement I is true but Statement II is false

D

Statement I is false but Statement II is true

Question 28: Palette 28/253

JEE Mains 2026 MCQ

Compound $(\mathrm{X})$ is subjected to the sequence of reactions as shown above. Molar mass of the major product $(\mathrm{Y})$ formed is $\_\_\_\_$ $\mathrm{g} \mathrm{mol}^{-1}$.

(Given molar mass in $\mathrm{g} \mathrm{mol}^{-1} \mathrm{C}: 12, \mathrm{H}: 1, \mathrm{O}: 16$ )

A

90

B

118

C

160

D

125

Question 29: Palette 29/253

JEE Mains 2026 MCQ

An organic compound “x” where molar ratio of C, O and H are equal, on treatment with 50% KOH under reflux followed by acidification produced “y”. The most likely structure of “y” is:

[Molar mass of ‘x’ is 58 g mol⁻¹]

A

B

$ \mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}=\mathrm{O} $

C

D

Question 30: Palette 30/253

JEE Mains 2026 MCQ

A molecule (X) with following structure under mild acidic condition is hydrolysed to produce (Y) and (Z). Identify the correct statements about (Y) and (Z).

A. Both (Y) and (Z) have same molar mass.

B. (Y) and (Z) can be distinguished from each other by NaHCO$_3$.

C. (Y) and (Z) react with HCN with same rates.

D. (Y) and (Z) undergo addition reaction with 2,4-DNP.

Choose the correct answer from the options given below :

A

A, B and C Only

B

B and C Only

C

C and D Only

D

A and D Only

Question 31: Palette 31/253

JEE Mains 2026 MCQ

Identify compounds A and E in the following reaction sequence.

A

B

C

D

Question 32: Palette 32/253

JEE Mains 2025 MCQ

When undergoes intramolecular aldol condensation, the major product formed is :

A

B

C

D

Question 33: Palette 33/253

JEE Mains 2025 MCQ

Choose the correct option for structures of $A$ and $B$, respectively

A

B

C

D

Question 34: Palette 34/253

JEE Mains 2025 MCQ

" P " is an optically active compound with molecular formula $\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}$. When ' P ' is treated with 2, 4-dinitrophenylhydrazine, it gives a positive test. However, in presence of Tollens reagent, " P " gives a negative test. Predict the structure of " P ".

A

B

C

D

Question 35: Palette 35/253

JEE Mains 2025 MCQ

Which among the following compounds give yellow solid when reacted with $\mathrm{NaOI} / \mathrm{NaOH}$ ?

Choose the correct answer from the options given below :

A

(A) and (C) Only

B

(C) and (D) Only

C

(B), (C) and (E) Only

D

(A), (C) and (D) Only

Question 36: Palette 36/253

JEE Mains 2025 MCQ

Aldol condensation is a popular and classical method to prepare $\alpha, \beta$-unsaturated carbonyl compounds. This reaction can be both intermolecular and intramolecular. Predict which one of the following is not a product of intramolecular aldol condensation?

A

B

C

D

Question 37: Palette 37/253

JEE Mains 2025 MCQ

An organic compound $(\mathrm{X})$ with molecular formula $\mathrm{C}_3 \mathrm{H}_6 \mathrm{O}$ is not readily oxidised. On reduction it gives $\mathrm{C}_3 \mathrm{H}_8 \mathrm{O}(\mathrm{Y})$ which reacts with HBr to give a bromide $(\mathrm{Z})$ which is converted to Grignard reagent. This Grignard reagent on reaction with $(\mathrm{X})$ followed by hydrolysis give 2,3-dimethylbutan-2-ol. Compounds $(\mathrm{X}),(\mathrm{Y})$ and $(\mathrm{Z})$ respectively are:

A

$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CHO}, \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{OH}, \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{Br}$

B

$\mathrm{CH}_3 \mathrm{COCH}_3, \mathrm{CH}_3 \mathrm{CH}(\mathrm{OH}) \mathrm{CH}_3, \mathrm{CH}_3 \mathrm{CH}(\mathrm{Br}) \mathrm{CH}_3$

C

$\mathrm{CH}_3 \mathrm{COCH}_3, \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{OH}, \mathrm{CH}_3 \mathrm{CH}(\mathrm{Br}) \mathrm{CH}_3$

D

$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CHO}, \mathrm{CH}_3 \mathrm{CH}=\mathrm{CH}_2, \mathrm{CH}_3 \mathrm{CH}(\mathrm{Br}) \mathrm{CH}_3$

Question 38: Palette 38/253

JEE Mains 2025 MCQ

$ \text {The major product }(\mathrm{P}) \text { in the following reaction is : } $

A

B

C

D

Question 39: Palette 39/253

JEE Mains 2025 MCQ

Number of molecules from below which cannot give iodoform reaction is :

Ethanol, Isopropyl alcohol, Bromoacetone, 2-Butanol, 2-Butanone, Butanal, 2-Pentanone, 3-Pentanone, Pentanal and 3-Pentanol.

A

4

B

3

C

5

D

2

Question 40: Palette 40/253

JEE Mains 2025 MCQ

Consider the following reactions. From these reactions which reaction will give carboxylic acid as a major product ?

(A) $\quad \mathrm{R}-\mathrm{C} \equiv \mathrm{N} \xrightarrow[\text { mild condition }]{\text { (i) } \stackrel{+}{\mathrm{H}} / \mathrm{H}_2 \mathrm{O}}$

(B) $\quad \mathrm{R}-\mathrm{MgX} \xrightarrow[\text { (ii) } \mathrm{H}_3 \mathrm{O}^{+}]{\text {(i) } \mathrm{CO}_2}$

(C) $\mathrm{R}-\mathrm{C} \equiv \mathrm{N} \xrightarrow[\text { (ii) } \mathrm{H}_3 \mathrm{O}^{+}]{\text {(i) } \mathrm{SnCl}_2 / \mathrm{HCl}}$

(D) $\quad \mathrm{R} \cdot \mathrm{CH}_2 \cdot \mathrm{OH} \xrightarrow{\mathrm{PCC}}$

(E)

Choose the correct answer from the options given below :

A

A, B and E only

B

A and D only

C

B, C and E only

D

B and E only

Question 41: Palette 41/253

JEE Mains 2025 MCQ

Given below are two statements:

Statement I : Vanilin will react with NaOH and also with Tollen's reagent.

Statement II : Vanilin will undergo self aldol condensation very easily.

In the light of the above statements, choose the most appropriate answer from the options given below :

A

Statement I is correct but Statement II is incorrect

B

Both Statement I and Statement II are correct

C

Both Statement I and Statement II are incorrect

D

Statement I is incorrect but Statement II is correct

Question 42: Palette 42/253

JEE Mains 2025 MCQ

An optically active alkyl halide $\mathrm{C}_4 \mathrm{H}_9 \mathrm{Br}[\mathrm{A}]$ reacts with hot KOH dissolved in ethanol and forms alkene $[B]$ as major product which reacts with bromine to give dibromide $[C]$. The compound [C] is converted into a gas [D] upon reacting with alcoholic $\mathrm{NaNH}_2$. During hydration 18 gram of water is added to 1 mole of gas [D] on warming with mercuric sulphate and dilute acid at 333 K to form compound [E]. The IUPAC name of compound [ E ] is :

A

Butan-2-ol

B

But-2-yne

C

Butan-2-one

D

Butan-1-al

Question 43: Palette 43/253

JEE Mains 2025 MCQ

The product (P) formed in the following reaction is :

A

B

C

D

Question 44: Palette 44/253

JEE Mains 2025 MCQ

The total number of compounds from below when treated with hot KMnO₄, giving benzoic acid is:

A

4

B

3

C

5

D

6

Question 45: Palette 45/253

JEE Mains 2025 MCQ

Both acetaldehyde and acetone (individually) undergo which of the following reactions?

A. Iodoform Reaction

B. Cannizaro Reaction

C. Aldol Condensation

D. Tollen's Test

E. Clemmensen Reduction

Choose the correct answer from the options given below:

A

C and E Only

B

A, B and D Only

C

A, C and E Only

D

B, C and D Only

Question 46: Palette 46/253

JEE Mains 2025 MCQ

The compounds that produce $\mathrm{CO}_2$ with aqueous $\mathrm{NaHCO}_3$ solution are:

Choose the correct answer from the options given below:

A

A and C Only

B

A, B and E Only

C

A and B Only

D

A, C and D Only

Question 47: Palette 47/253

JEE Mains 2025 MCQ

Match List - I with List - II.

	List - I		List - II
(A)		(I)	Etard reaction
(B)		(II)	Gatterman-Koch reaction
(C)		(III)	Rosenmund reduction
(D)		(IV)	Stephen reaction

Choose the correct answer from the options given below :

A

(A)-(III), (B)-(IV), (C)-(I), (D)-(II)

B

(A)-(IV), (B)-(III), (C)-(I), (D)-(II)

C

(A)-(I), (B)-(III), (C)-(II), (D)-(IV)

D

(A)-(III), (B)-(IV), (C)-(II), (D)-(I)

Question 48: Palette 48/253

JEE Mains 2025 MCQ

Which of the following arrangements with respect to their reactivity in nucleophilic addition reaction is correct?

A

acetophenone $<$ benzaldehyde $<$ p-tolualdehyde $<$ p- nitrobenzaldehyde

B

acetophenone $<$ p-tolualdehyde $<$ benzaldehyde $<$ p- nitrobenzaldehyde

C

p- nitrobenzaldehyde $<$ benzaldehyde $<$ p-tolualdehyde $<$ acetophenone

D

benzaldehyde $<$ acetophenone $<$ p- nitrobenzaldehyde $<$ p-tolualdehyde

Question 49: Palette 49/253

JEE Mains 2025 MCQ

Aman has been asked to synthesise the molecule He thought of preparing the molecule using an aldol condensation reaction. He found a few cyclic alkenes in his laboratory. He thought of performing ozonolysis reaction on alkene to produce a dicarbonyl compound followed by aldol reaction to prepare " $x$ ". Predict the suitable alkene that can lead to the formation of " $x$ ".

A

B

C

D

Question 50: Palette 50/253

JEE Mains 2025 MCQ

Given below are two statements:

Consider the following reaction

Statement (I): In the case of formaldehyde is about 2280, due to small substituents, hydration is faster.

Statement (II) : In the case of trichloro acetaldehyde is about 2000 due to $-$I effect of $-$Cl .

In the light of the above statements, choose the correct answer from the options given below :

A

Statement I is true but Statement II is false

B

Both Statement I and Statement II are true

C

Statement I is false but Statement II is true

D

Both Statement I and Statement II are false

Question 51: Palette 51/253

JEE Mains 2025 MCQ

The major product of the following reaction is :

$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}=\mathrm{O} \xrightarrow[\text { reflux }]{\substack{\text { excess } \mathrm{HCHO} \\ \text { alkali }}}$ ?

A

B

$\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{OH}$

C

D

Question 52: Palette 52/253

JEE Mains 2025 MCQ

Residue (A) + HCl (dil) $\rightarrow$ Compound (B)

Structure of residue (A) and compound (B) formed respectively is :

A

B

C

D

Question 53: Palette 53/253

JEE Mains 2025 MCQ

The compounds which give positive Fehling's test are :

Choose the correct answer from the options given below :

A

(A), (C) and (D) Only

B

(A), (B) and (C) Only

C

(A), (D) and (E) Only

D

(C), (D) and (E) Only

Question 54: Palette 54/253

JEE Mains 2025 MSQ

A molecule ("P") on treatment with acid undergoes rearrangement and gives ("Q"). ("Q") on ozonolysis followed by reflux under alkaline condition gives (" $R$ "). The structure of (" $R$ ") is given below.

The structure of ("P") is

A

B

C

D

Question 55: Palette 55/253

JEE Mains 2024 MCQ

In the above reaction product 'P' is

A

B

C

D

Question 56: Palette 56/253

JEE Mains 2024 MCQ

Which of the following compounds will give silver mirror with ammoniacal silver nitrate?

A. Formic acid

B. Formaldehyde

C. Benzaldehyde

D. Acetone

Choose the correct answer from the options given below :

A

B and C only

B

C and D only

C

A, B and C only

D

A only

Question 57: Palette 57/253

JEE Mains 2024 MCQ

Identify major product "X" formed in the following reaction :

A

B

C

D

Question 58: Palette 58/253

JEE Mains 2024 MCQ

What is the structure of C?

A

B

C

D

Question 59: Palette 59/253

JEE Mains 2024 MCQ

Identify the product (P) in the following reaction:

A

B

C

D

Question 60: Palette 60/253

JEE Mains 2024 MCQ

Consider the given reaction, identify the major product P.

A

B

C

D

Question 61: Palette 61/253

JEE Mains 2024 MCQ

Which among the following aldehydes is most reactive towards nucleophilic addition reactions?

A

B

C

D

Question 62: Palette 62/253

JEE Mains 2024 MCQ

Identify A and B in the given chemical reaction sequence :

A

B

C

D

Question 63: Palette 63/253

JEE Mains 2024 MCQ

Consider the given chemical reaction :

Product "A" is :

A

picric acid

B

oxalic acid

C

adipic acid

D

acetic acid

Question 64: Palette 64/253

JEE Mains 2024 MCQ

Identify 'A' in the following reaction :

A

B

C

D

Question 65: Palette 65/253

JEE Mains 2024 MCQ

Given below are two statements :

Statements I : Acidity of $\alpha$-hydrogens of aldehydes and ketones is responsible for Aldol reaction.

Statement II : Reaction between benzaldehyde and ethanal will NOT give Cross - Aldol product.

In the light of the above statements, choose the most appropriate answer from the options given below :

A

Both Statement I and Statement II are incorrect

B

Statement I is correct but Statement II is incorrect

C

Both Statement I and Statement II are correct

D

Statement I is incorrect but Statement II is correct

Question 66: Palette 66/253

JEE Mains 2024 MCQ

Identify the product in the following reaction:

A

B

C

D

Question 67: Palette 67/253

JEE Mains 2024 MCQ

Which among the followng has highest boiling point?

A

$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{CH}_2-\mathrm{OH}$

B

$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{CH}_3$

C

$\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{CHO}$

D

$\mathrm{H}_5 \mathrm{C}_2-\mathrm{O}-\mathrm{C}_2 \mathrm{H}_5$

Question 68: Palette 68/253

JEE Mains 2024 MCQ

Identify $A$ and $B$ in the following sequence of reaction

A

B

C

D

Question 69: Palette 69/253

JEE Mains 2024 MCQ

Match List - I with List - II.

List I (Reactions)	List II (Reagents)
(A)	(I) CH3MgBr, H2O
(B) C6H5COC6H5 ⟶ C6H5CH2C6H5	(II) Zn(Hg) and conc. HCl
(C) C6H5CHO ⟶ C6H5CH(OH)CH3	(III) NaBH4, H+
(D)	(IV) DIBAL-H, H2O

Choose the correct answer from the options given below :

A

(A)-(III), (B)-(IV), (C)-(II), (D)-(I)

B

(A)-(IV), (B)-(II), (C)-(III), (D)-(I)

C

(A)-(IV), (B)-(II), (C)-(I), (D)-(III)

D

(A)-(III), (B)-(IV), (C)-(I), (D)-(II)

Question 70: Palette 70/253

JEE Mains 2024 MCQ

Identify major product 'P' formed in the following reaction.

A

B

C

D

Question 71: Palette 71/253

JEE Mains 2024 MCQ

Identify the name reaction.

A

Stephen Reaction

B

Etard Reaction

C

Gatterman - Koch Reaction

D

Rosenmund Reduction

Question 72: Palette 72/253

JEE Mains 2024 MCQ

Salicylaldehyde is synthesized from phenol, when reacted with

A

$\mathrm{HCCl}_3, \mathrm{NaOH}$

B

$\mathrm{CO}_2, \mathrm{NaOH}$

C

D

CCl$_4$, NaOH

Question 73: Palette 73/253

JEE Mains 2024 MCQ

m-chlorobenzaldehyde on treatment with 50% KOH solution yields :

A

B

C

D

Question 74: Palette 74/253

JEE Mains 2024 MCQ

This reduction reaction is known as:

A

Wolff-Kishner reduction

B

Etard reduction

C

Stephen reduction

D

Rosenmund reduction

Question 75: Palette 75/253

JEE Mains 2024 MCQ

Structure of 4-Methylpent-2-enal is :

A

B

C

D

Question 76: Palette 76/253

JEE Mains 2024 MCQ

Identify the reagents used for the following conversion

A

$\mathrm{A}=\mathrm{LiAlH}_4, \mathrm{~B}=\mathrm{NaOH}_{(\mathrm{aq})}, \mathrm{C}=\mathrm{NH}_2-\mathrm{NH}_2 / \mathrm{KOH} \text {, ethylene glycol }$

B

$\mathrm{A}=\mathrm{DIBAL}-\mathrm{H}, \mathrm{B}=\mathrm{NaOH}_{(\mathrm{aq})}, \mathrm{C}=\mathrm{NH}_2-\mathrm{NH}_2 / \mathrm{KOH} \text {, ethylene glycol }$

C

$\mathrm{A}=\mathrm{LiAlH}_4, \mathrm{~B}=\mathrm{NaOH}_{(\mathrm{alc})}, \mathrm{C}=\mathrm{Zn} / \mathrm{HCl}$

D

$\mathrm{A}=\mathrm{DIBAL}-\mathrm{H}, \mathrm{B}=\mathrm{NaOH}_{(\mathrm{alc})}, \mathrm{C}=\mathrm{Zn} / \mathrm{HCl}$

Question 77: Palette 77/253

JEE Mains 2024 MCQ

The molecular formula of second homologue in the homologous series of mono carboxylic acids is

A

$\mathrm{C}_2 \mathrm{H}_4 \mathrm{O}_2$

B

$\mathrm{C}_2 \mathrm{H}_2 \mathrm{O}_2$

C

$\mathrm{CH}_2 \mathrm{O}$

D

$\mathrm{C}_3 \mathrm{H}_6 \mathrm{O}_2$

Question 78: Palette 78/253

JEE Mains 2024 MCQ

Highest enol content will be shown by:

A

B

C

D

Question 79: Palette 79/253

JEE Mains 2023 MCQ

In the above conversion the correct sequence of reagents to be added is

A

(i) $\mathrm{KMnO}_{4}$, (ii) $\mathrm{Br}_{2} / \mathrm{Fe}$, (iii) $\mathrm{Fe} / \mathrm{H}^{+}$, (iv) $\mathrm{Cl}_{2}$

B

(i) $\mathrm{Fe} / \mathrm{H}^{+}$, (ii) $\mathrm{HONO}$, (iii) $\mathrm{CuCl}$, (iv) $\mathrm{KMnO}_4$, (v) $\mathrm{Br}_2$

C

(i) $\mathrm{Br}_{2} / \mathrm{Fe}$, (ii) $\mathrm{Fe} / \mathrm{H}^{+}$, (iii) $\mathrm{HONO}$, (iv) $\mathrm{CuCl}$, (v) $\mathrm{KMnO}_{4}$

D

(i) $\mathrm{Br}_{2} / \mathrm{Fe}$, (ii) $\mathrm{Fe} / \mathrm{H}^{+}$, (iii) $\mathrm{KMnO}_{4}$, (iv) $\mathrm{Cl}_{2}$

Question 80: Palette 80/253

JEE Mains 2023 MCQ

In the reaction given below

'A' is

A

B

C

D

Question 81: Palette 81/253

JEE Mains 2023 MCQ

The two products formed in above reaction are -

A

Butanal and acetaldehyde

B

Butanoic acid and acetic acid

C

Butanal and acetic acid

D

Butanoic acid and acetaldehyde

Question 82: Palette 82/253

JEE Mains 2023 MCQ

'A' in the above reaction is:

A

B

C

D

Question 83: Palette 83/253

JEE Mains 2023 MCQ

In the following reaction

'A' is

A

B

C

D

Question 84: Palette 84/253

JEE Mains 2023 MCQ

The major product 'P' formed in the following sequence of reactions is

A

B

C

D

Question 85: Palette 85/253

JEE Mains 2023 MCQ

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A : A solution of the product obtained by heating a mole of glycine with a mole of chlorine in presence of red phosphorous generates chiral carbon atom.

Reason R : A molecule with 2 chiral carbons is always optically active.

In the light of the above statements, choose the correct answer from the options given below:

A

Both A and R are true and R is the correct explanation of A

B

Both A and R are true but R is NOT the correct explanation of A

C

A is true but R is false

D

A is false but R is true

Question 86: Palette 86/253

JEE Mains 2023 MCQ

'A' and 'B' in the above reactions are:

A

B

C

D

Question 87: Palette 87/253

JEE Mains 2023 MCQ

The major product 'P' formed in the given reaction is

A

B

C

D

Question 88: Palette 88/253

JEE Mains 2023 MCQ

The major product formed in the following reaction is:

A

B

C

D

Question 89: Palette 89/253

JEE Mains 2023 MCQ

Match List I with List II:

	LIST I (Reagents used)		LIST II (Compound with Functional group detected)
A.	Alkaline solution of copper sulphate and sodium citrate	I.
B.	Neutral $\mathrm{FeCl_3}$	II.
C.	Alkaline chloroform solution	III.
D.	Potassium iodide and sodium hypochlorite	IV.

Choose the correct answer from the options given below:

A

A-IV, B-I, C-II, D-III

B

A-III, B-IV, C-I, D-II

C

A-III, B-IV, C-II, D-I

D

A-II, B-IV, C-III, D-I

Question 90: Palette 90/253

JEE Mains 2023 MCQ

In a reaction,

reagents 'X' and 'Y' respectively are :

A

$\mathrm{CH}_{3} \mathrm{OH} / \mathrm{H}^{+}, \Delta$ and $\left(\mathrm{CH}_{3} \mathrm{CO}\right)_{2} \mathrm{O} / \mathrm{H}^{+}$

B

$\left(\mathrm{CH}_{3} \mathrm{CO}\right)_{2} \mathrm{O} / \mathrm{H}^{+}$ and $\mathrm{CH}_{3} \mathrm{OH} / \mathrm{H}^{+}, \Delta$

C

$\mathrm{CH}_{3} \mathrm{OH} / \mathrm{H}^{+}, \Delta$ and $\mathrm{CH}_{3} \mathrm{OH} / \mathrm{H}^{+}, \Delta$

D

$\left(\mathrm{CH}_{3} \mathrm{CO}\right)_{2} \mathrm{O} / \mathrm{H}^{+}$ and $\left(\mathrm{CH}_{3} \mathrm{CO}\right)_{2} \mathrm{O} / \mathrm{H}^{+}$

Question 91: Palette 91/253

JEE Mains 2023 MCQ

The structures of major products A, B and C in the following reaction are sequence.

A

B

C

D

Question 92: Palette 92/253

JEE Mains 2023 MCQ

Cyclohexylamine when treated with nitrous acid yields $(\mathrm{P})$. On treating $(\mathrm{P})$ with $\mathrm{PCC}$ results in (Q). When $(\mathrm{Q})$ is heated with dil. $\mathrm{NaOH}$ we get $(\mathrm{R})$ The final product (R) is :

A

B

C

D

Question 93: Palette 93/253

JEE Mains 2023 MCQ

Consider the following reaction

The correct statement for product B is. It is

A

racemic mixture and is neutral

B

optically active and adds one mole of bromine

C

racemic mixture and gives a gas with saturated $\mathrm{NaHCO}_{3}$ solution

D

optically active alcohol and is neutral

Question 94: Palette 94/253

JEE Mains 2023 MCQ

Given below are two statements: One is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: can be easily reduced using $\mathrm{Zn}-\mathrm{Hg} / \mathrm{HCl}$ to

Reason $\mathrm{R}: \mathrm{Zn}-\mathrm{Hg} / \mathrm{HCl}$ is used to reduce carbonyl group to $-\mathrm{CH}_{2}-$ group.

In the light of the above statements, choose the correct answer from the options given below:

A

${ \text {Both } A \text { and }} \mathrm{R}$ are true and $\mathrm{R}$ is the correct explanation of $\mathrm{A}$

B

$\mathrm{A}$ is false but $\mathrm{R}$ is true

C

A is true but $\mathrm{R}$ is false

D

Both $\mathrm{A}$ and $\mathrm{R}$ are true but $\mathrm{R}$ is not the correct explanation of $\mathrm{A}$

Question 95: Palette 95/253

JEE Mains 2023 MCQ

What is the correct order of acidity of the protons marked $\mathrm{A}-\mathrm{D}$ in the given compounds ?

A

$\mathrm{H}_{\mathrm{D}}>\mathrm{H}_{\mathrm{C}}>\mathrm{H}_{\mathrm{B}}>\mathrm{H}_{\mathrm{A}}$

B

$\mathrm{H}_{\mathrm{C}}>\mathrm{H}_{\mathrm{A}}>\mathrm{H}_{\mathrm{D}}>\mathrm{H}_{\mathrm{B}}$

C

$\mathrm{H}_{\mathrm{C}}>\mathrm{H}_{\mathrm{D}}>\mathrm{H}_{\mathrm{B}}>\mathrm{H}_{\mathrm{A}}$

D

$\mathrm{H}_{\mathrm{C}}>\mathrm{H}_{\mathrm{D}}>\mathrm{H}_{\mathrm{A}}>\mathrm{H}_{\mathrm{B}}$

Question 96: Palette 96/253

JEE Mains 2023 MCQ

Which of the following compounds would give the following set of qualitative analysis ?

(i) Fehling's Test : Positive

(ii) Na fusion extract upon treatment with sodium nitroprusside gives a blood red colour but not prussian blue.

A

B

C

D

Question 97: Palette 97/253

JEE Mains 2023 MCQ

Find out the major products from the following reaction sequence.

A

B

C

D

Question 98: Palette 98/253

JEE Mains 2023 MCQ

'A' in the given reaction is

A

B

C

D

Question 99: Palette 99/253

JEE Mains 2023 MCQ

Identify the product formed (A and E)

A

B

C

D

Question 100: Palette 100/253

JEE Mains 2023 MCQ

'R' formed in the following sequence of reactions is :

A

B

C

D

Question 101: Palette 101/253

JEE Mains 2023 MCQ

Compound (X) undergoes following sequence of reactions to give the Lactone (Y).

A

B

C

D

Question 102: Palette 102/253

JEE Mains 2022 MCQ

Correct structure of $\gamma$-methylcyclohexane carbaldehyde is

A

B

C

D

Question 103: Palette 103/253

JEE Mains 2022 MCQ

Consider the above reaction sequence, the Product 'C' is :

A

B

C

D

Question 104: Palette 104/253

JEE Mains 2022 MCQ

Find out the major product for the above reaction.

A

B

C

D

Question 105: Palette 105/253

JEE Mains 2022 MCQ

The structure of A in the given reaction is :

A

B

C

D

Question 106: Palette 106/253

JEE Mains 2022 MCQ

Match List - I with List - II.

	List - I		List - II
(A)		(I)	Gatterman Koch reaction
(B)	$C{H_3} - CN\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{{H_3}{O^ + }}^{SnC{l_2}/HCl}} C{H_3} - CHO$	(II)	Etard reaction
(C)		(III)	Stephen reaction
(D)		(IV)	Rosenmund reaction

Choose the correct answer from the options given below :

A

$(\mathrm{A})-(\mathrm{IV}),(\mathrm{B})-(\mathrm{III}),(\mathrm{C})-(\mathrm{II}),(\mathrm{D})-(\mathrm{I})$

B

$(\mathrm{A})-(\mathrm{I}),(\mathrm{B})-(\mathrm{II}),(\mathrm{C})-(\mathrm{III}),(\mathrm{D})-(\mathrm{IV})$

C

$(\mathrm{A})-(\mathrm{II}),(\mathrm{B})-(\mathrm{III}),(\mathrm{C})-(\mathrm{IV}),(\mathrm{D})-(\mathrm{I})$

D

$(\mathrm{A})-(\mathrm{III}),(\mathrm{B})-(\mathrm{II}),(\mathrm{C})-(\mathrm{I}),(\mathrm{D})-(\mathrm{IV})$

Question 107: Palette 107/253

JEE Mains 2022 MCQ

Consider the above reaction and predict the major product.

A

B

C

D

Question 108: Palette 108/253

JEE Mains 2022 MCQ

The products formed in the following reaction, A and B are

A

B

C

D

Question 109: Palette 109/253

JEE Mains 2022 MCQ

What is the major product of the following reaction?

A

B

C

D

Question 110: Palette 110/253

JEE Mains 2022 MCQ

$C{H_3} - C{H_2} - CN\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{Ether}^{C{H_3}MgBr}} A\buildrel {{H_3}{O^ + }} \over \longrightarrow B\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{HCl}^{Zn - Hg}} C$

The correct structure of C is

A

$C{H_3} - C{H_2} - C{H_2} - C{H_3}$

B

C

D

$C{H_3} - C{H_2} - CH = C{H_2}$

Question 111: Palette 111/253

JEE Mains 2022 MCQ

Which one of the following reactions does not represent correct combination of substrate and product under the given conditions?

A

B

C

D

Question 112: Palette 112/253

JEE Mains 2022 MCQ

Consider the given chemical reaction

Identify the product P.

A

B

C

D

Question 113: Palette 113/253

JEE Mains 2022 MCQ

Choose the reaction which is not possible:

A

B

C

D

Question 114: Palette 114/253

JEE Mains 2022 MCQ

Which among the following will be the major product of the given reaction?

A

B

C

D

Question 115: Palette 115/253

JEE Mains 2022 MCQ

Given below are two statements :

Statement I : The esterification of carboxylic acid with an alcohol is a nucleophilic acyl substitution.

Statement II : Electron withdrawing groups in the carboxylic acid will increase the rate of esterification reaction.

Choose the most appropriate option :

A

Both Statement I and Statement II are correct.

B

Both Statement I and Statement II are incorrect.

C

Statement I is correct but Statement II is incorrect.

D

Statement I is incorrect but Statement II is correct.

Question 116: Palette 116/253

JEE Mains 2022 MCQ

Isobutyraldehyde on reaction with formaldehyde and K₂CO₃ gives compound 'A'. Compound 'A' reacts with KCN and yields compound 'B', which on hydrolysis gives a stable compound 'C'. The compound 'C' is

A

B

C

D

Question 117: Palette 117/253

JEE Mains 2022 MCQ

The correct structure of product 'A' formed in the following reaction.

is

A

B

C

D

Question 118: Palette 118/253

JEE Mains 2022 MCQ

'A' and 'B' respectively are:

A

1-methylcyclohex-1,3-diene & cyclopentene.

B

Cyclohex-1,3-diene & cyclopentene

C

1-methylcyclohex-1,4-diene & 1-methylcyclopent-1-ene

D

Cyclohex-1,3-diene & 1-methylcyclopent-1-ene

Question 119: Palette 119/253

JEE Mains 2022 MCQ

Which of the following reactions will yield benzaldehyde as a product?

A

(B) and (C)

B

(C) and (D)

C

(A) and (D)

D

(A) and (C)

Question 120: Palette 120/253

JEE Mains 2022 MCQ

Oxidation of toluene to benzaldehyde can be easily carried out with which of the following reagents?

A

CrO₃/acetic acid, H₃O⁺

B

CrO₃/acetic anhydride, H₃O⁺

C

KMnO₄/HCl, H₃O⁺

D

CO/HCl, anhydrous AlCl₃

Question 121: Palette 121/253

JEE Mains 2022 MCQ

The reagent, from the following, which converts benzoic acid to benzaldehyde in one step is

A

LiAlH₄

B

KMnO₄

C

MnO

D

NaBH₄

Question 122: Palette 122/253

JEE Mains 2022 MCQ

The final product 'A' in the following reaction sequence

A

B

C

D

Question 123: Palette 123/253

JEE Mains 2022 MCQ

(C₇H₅O₂)₂ $\buildrel {hv} \over \longrightarrow $ [X] $\to$ 2C₆H₅ + 2CO₂

Consider the above reaction and identify the intermediate 'X'

A

B

C

D

Question 124: Palette 124/253

JEE Mains 2022 MCQ

Which will have the highest enol content?

A

B

C

D

Question 125: Palette 125/253

JEE Mains 2022 MCQ

Which of the following conditions or reaction sequence will NOT give acetophenone as the major product?

A

B

C

D

Question 126: Palette 126/253

JEE Mains 2022 MCQ

Two statements are given below :

Statement I : The melting point of monocarboxylic acid with even number of carbon atoms is higher than that of with odd number of carbon atoms acid immediately below and above it in the series.

Statement II : The solubility of monocarboxylic acids in water decreases with increase in molar mass.

Choose the most appropriate option :

A

Both Statement I and Statement II are correct.

B

Both Statement I and Statement II are incorrect.

C

Statement I is correct but Statement II is incorrect.

D

Statement I is incorrect but Statement II is correct.

Question 127: Palette 127/253

JEE Mains 2021 MCQ

Experimentally reducing a functional group cannot be done by which one of the following reagents?

A

Pt-C/H₂

B

Na/H₂

C

Pd-C/H₂

D

Zn/H₂O

Question 128: Palette 128/253

JEE Mains 2021 MCQ

In the following sequence of reactions a compound A, (molecular formula C₆H₁₂O₂) with a straight chain structure gives a C₄ carboxylic acid. A is :

A

$C{H_3} - C{H_2} - COO - C{H_2} - C{H_2} - C{H_3}$

B

C

$C{H_3} - C{H_2} - C{H_2} - COO - C{H_2} - C{H_3}$

D

$C{H_3} - C{H_2} - C{H_2} - O - CH = CH - C{H_2} - OH$

Question 129: Palette 129/253

JEE Mains 2021 MCQ

Given below are two statements :

Statement I : The nucleophilic addition of sodium hydrogen sulphite to an aldehyde or a ketone involves proton transfer to form a stable ion.

Statement II : The nucleophilic addition of hydrogen cyanide to an aldehyde or a ketone yields amine as final product.

In the light of the above statements, choose the most appropriate answer from the options given below :

A

Both Statement I and Statement are true.

B

Statement I is true but Statement II is false.

C

Statement I is false but Statement II is true.

D

Both Statement I and Statement II are false.

Question 130: Palette 130/253

JEE Mains 2021 MCQ

The structures A and B formed in the following reaction are : [Ph = $-$C₆H₅]

A

B

C

D

Question 131: Palette 131/253

JEE Mains 2021 MCQ

For the reaction given below :-



The compound which is not formed as a product in the reaction is a :

A

compound with both alcohol and acid functional groups

B

monocarboxylic acid

C

dicarboxylic acid

D

diol

Question 132: Palette 132/253

JEE Mains 2021 MCQ

The structure of product C, formed by the following sequence of reactions is :

A

B

C

D

Question 133: Palette 133/253

JEE Mains 2021 MCQ

Given below are two statements :

Statement I : Ethyl pent-4-yn-oate on reaction with CH₃MgBr gives a 3$^\circ$-alcohol.

Statement II : In this reaction one mole of ethyl pent-4-yn-oate utilizes two moles of CH₃MgBr.

In the light of the above statements, choose the most appropriate answer from the options given below :

A

Both Statement I and Statement II are false.

B

Statement I is false but Statement II is true.

C

Statement I is true but Statement II is false.

D

Both Statement I and Statement II are true.

Question 134: Palette 134/253

JEE Mains 2021 MCQ

Which one of the following reactions will not yield propionic acid?

A

CH₃CH₂COCH₃ + OI^$-$/H₃O⁺

B

CH₃CH₂CH₃ + KMnO₄(Heat), OH^$-$/H₃O⁺

C

CH₃CH₂CCl₃ + OH^$-$/H₃O⁺

D

CH₃CH₂CH₂Br + Mg, CO₂ dry ether/H₃O⁺

Question 135: Palette 135/253

JEE Mains 2021 MCQ

The structure of the starting compound P used in the reaction given below is :

A

B

C

D

Question 136: Palette 136/253

JEE Mains 2021 MCQ

The major products formed in the following reaction sequence A and B are :

A

B

C

D

Question 137: Palette 137/253

JEE Mains 2021 MCQ

The correct sequential addition of reagents in the preparation of 3-nitrobenzoic acid from benzene is :

A

Br₂/AlBr₃, HNO₃/H₂SO₄, Mg/ether, CO₂, H₃O⁺

B

Br₂/AlBr³, NaCN, H₃O⁺, HNO₃/H₂SO₄

C

Br₂/AlBr₃, HNO₃/H₂SO₄, NaCN, H₃O⁺

D

HNO₃/H₂SO₄, Br₂/AlBr₃, Mg/ether, CO₂, H₃O⁺

Question 138: Palette 138/253

JEE Mains 2021 MCQ

Which one of the following compounds will give orange precipitate when treated with 2, 4-dinitrophenyl hydrazine?

A

B

C

D

Question 139: Palette 139/253

JEE Mains 2021 MCQ

Maleic anhydride can prepared by :

A

Heating trans-but-2-enedioic acid

B

Heating cis-but-2-enedioic acid

C

Treating cis-but-2-enedioic acid with alcohol and acid

D

Treating trans-but-2-enedioic acid with alcohol and acid

Question 140: Palette 140/253

JEE Mains 2021 MCQ

[where $Et \Rightarrow - {C_2}{H_5}{}^tBu \Rightarrow {(C{H_3})_3}C - $]

Consider the above reaction sequence, Product "A" and Product "B" formed respectively are :

A

B

C

D

Question 141: Palette 141/253

JEE Mains 2021 MCQ

Consider the given reaction, the product 'X' is :

A

B

C

D

Question 142: Palette 142/253

JEE Mains 2021 MCQ

Which one of the following compounds will liberate CO₂, when treated with NaHCO₃ ?

A

${(C{H_3})_3}\mathop {NH}\limits^ \oplus \mathop {Cl}\limits^\Theta $

B

${(C{H_3})_4}\mathop N\limits^ \oplus \mathop O\limits^\Theta H$

C

D

$C{H_3}N{H_2}$

Question 143: Palette 143/253

JEE Mains 2021 MCQ

The major product (P) in the following reaction is :

A

B

C

D

Question 144: Palette 144/253

JEE Mains 2021 MCQ

The correct order of their reactivity towards hydrolysis at room temperature is :

A

(A) > (B) > (C) > (D)

B

(D) > (A) > (B) > (C)

C

(D) > (B) > (A) > (C)

D

(A) > (C) > (B) > (D)

Question 145: Palette 145/253

JEE Mains 2021 MCQ

Which among the above compound/s does/do not form Silver mirror when treated with Tollen's reagent?

A

(I), (III) and (IV) only

B

Only (IV)

C

Only (II)

D

(III) and (IV) only

Question 146: Palette 146/253

JEE Mains 2021 MCQ

Consider the above reaction, the product 'X' and 'Y' respectively are :

A

B

C

D

Question 147: Palette 147/253

JEE Mains 2021 MCQ

Consider the above chemical reaction and identify product "A"

A

B

C

D

Question 148: Palette 148/253

JEE Mains 2021 MCQ

Considering the above chemical reaction, identify the product "X" :

A

B

C

D

Question 149: Palette 149/253

JEE Mains 2021 MCQ

The product ''A'' in the above reaction is :

A

B

C

D

Question 150: Palette 150/253

JEE Mains 2021 MCQ

Mesityl oxide is a common name of :

A

3-Methyl cyclohexane carbaldehyde

B

4-Methyl pent-3-en-2-one

C

2,4-Dimethyl pentan-3-one

D

2-Methyl cyclohexanone

Question 151: Palette 151/253

JEE Mains 2021 MCQ

In the above reaction, the reagent ''A'' is :

A

LiAlH₄

B

NaBH₄, H₃O⁺

C

HCl, Zn $-$ Hg

D

Alkaline KMnO₄, H⁺

Question 152: Palette 152/253

JEE Mains 2021 MCQ

The product ''P'' in the above reaction is :

A

B

C

D

Question 153: Palette 153/253

JEE Mains 2021 MCQ

Assertion A : Enol form of acetone [CH₃COCH₃] exists in < 0.1% quantity. However, the enol form of acetyl acetone [CH₃COCH₂OCCH₃] exists in approximately 15% quantity.

Reason R : Enol form of acetyl acetone is stabilized by intramolecular hydrogen bonding, which is not possible in enol form of acetone.

Choose the correct statement :

A

Both A and R are true but R is not the correct explanation of A

B

A is true but R is false

C

A is false but R is true

D

Both A and R are true and R is the correct explanation of A

Question 154: Palette 154/253

JEE Mains 2021 MCQ

Identify A in the following chemical reaction.

A

B

C

D

Question 155: Palette 155/253

JEE Mains 2021 MCQ

2, 4-DNP test can be used to identify :

A

ether

B

amine

C

aldehyde

D

halogens

Question 156: Palette 156/253

JEE Mains 2021 MCQ

Considering the above reaction, the major product among the following is :

A

B

C

D

Question 157: Palette 157/253

JEE Mains 2021 MCQ

Identify A in the given chemical reaction.

A

B

C

D

Question 158: Palette 158/253

JEE Mains 2021 MCQ

The major product of the following reaction is :

A

B

C

D

Question 159: Palette 159/253

JEE Mains 2021 MCQ

Which one of the following reactions will not form acetaldehyde?

A

$C{H_3}C{H_2}OH\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{573K}^{Cu}} $

B

$C{H_3}C{H_2}OH\buildrel {Cr{O_3} - {H_2}S{O_4}} \over \longrightarrow $

C

$C{H_2} = C{H_2} + {O_2}\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{{H_2}O}^{Pd(II)/Cu(II)}} $

D

$C{H_3}CN\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{ii)\,{H_2}O}^{i)\,DIBAL - H}} $

Question 160: Palette 160/253

JEE Mains 2021 MCQ

Compound(s) which will liberate carbon dioxide with sodium bicarbonate solution is/are :

A

C only

B

B only

C

B and C only

D

A and B only

Question 161: Palette 161/253

JEE Mains 2021 MCQ

The major product of the following chemical reaction is :

A

$C{H_3}C{H_2}CHO$

B

$C{H_3}C{H_2}C{H_3}$

C

$C{H_3}C{H_2}C{H_2}OH$

D

${(C{H_3}C{H_2}CO)_2}O$

Question 162: Palette 162/253

JEE Mains 2021 MCQ

Which one of the following carbonyl compounds cannot be prepared by addition of water on an alkyne in the presence of HgSO₄ and H₂SO₄?

A

B

C

D

Question 163: Palette 163/253

JEE Mains 2021 MCQ

Which of the following reagent is suitable for the preparation of the product in the above reaction?

A

Red P + Cl₂

B

$N{H_2} - N{H_2}/{C_2}{H_5}\mathop O\limits^\Theta \mathop N\limits^ \oplus a$

C

NaBH₄

D

Ni/H₂

Question 164: Palette 164/253

JEE Mains 2021 MCQ

Match List - I and List - II.

	List-I		List-II
(a)		(i)	$\mathrm{Br}_{2} / \mathrm{NaOH}$
(b)		(ii)	$\mathrm{H}_{2} / \mathrm{Pd}-\mathrm{BaSO}_{4}$
(c)		(iii)	$\mathrm{Zn}(\mathrm{Hg}) / \mathrm{H}$ Conc. $\mathrm{HCl}$
(d)		(iv)	$\mathrm{Cl}_{2}$ Red $\mathrm{P}, \mathrm{H}_{2} \mathrm{O}$

Choose the correct answer from the options given below :

A

(a)-(ii), (b)-(iv), (c)-(i), (d)-(iii)

B

(a)-(iii), (b)-(iv), (c)-(i), (d)-(ii)

C

(a)-(iii), (b)-(i), (c)-(iv), (d)-(ii)

D

(a)-(ii), (b)-(i), (c)-(iv), (d)-(iii)

Question 165: Palette 165/253

JEE Mains 2021 MCQ

Which of the following reagent is used for the following reaction ?

$ \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_3 \stackrel{?}{\longrightarrow} \mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CHO} $

A

Molybdenum oxide

B

Manganese acetate

C

Copper at high temperature and pressure

D

Potassium permanganate

Question 166: Palette 166/253

JEE Mains 2020 MCQ

The correct match between Item-I (starting material) and Item-II (reagent) for the preparation of benzaldehyde is :

Item-I	Item-II
(I) Benzene	(P) HCl and SnCl2, H3O+
(II) Benzonitrile	(Q) H2, Pd-BaSO4, S and quinoline
(III) Benzoyl Chloride	(R) CO, HCl and AlCl3

A

(I) - (R), (II) - (P) and (III) - (Q)

B

(I) - (P), (II) - (Q) and (III) - (R)

C

(I) - (Q), (II) - (R) and (III) - (P)

D

(I) - (R), (II) - (Q) and (III) - (P)

Question 167: Palette 167/253

JEE Mains 2020 MCQ

The major products of the following reaction are :

A

B

C

D

Question 168: Palette 168/253

JEE Mains 2020 MCQ

Consider the following reactions
'A' is :

A

B

C

D

Question 169: Palette 169/253

JEE Mains 2020 MCQ

The increasing order of the acidity of the $\alpha $-hydrogen of the following compounds is :

A

(C) < (A) < (B) < (D)

B

(B) < (C) < (A) < (D)

C

(A) < (C) < (D) < (B)

D

(D) < (C) < (A) < (B)

Question 170: Palette 170/253

JEE Mains 2020 MCQ

In the following reaction sequence the major products A and B are :

A

B

C

D

Question 171: Palette 171/253

JEE Mains 2020 MCQ

Which of the following derivatives of alcohols is unstable in an aqueous base?

A

RO—CMe3

B

C

D

Question 172: Palette 172/253

JEE Mains 2020 MCQ

The major product [C] of the following reaction sequence will be :

A

B

C

D

Question 173: Palette 173/253

JEE Mains 2020 MCQ

An organic compound (A) (molecular formula C₆H₁₂O₂) was hydrolysed with dil. H₂SO₄ to give a carboxylic acid (B) and an alcohol (C). ‘C’ gives white turbidity immediately when treated with anhydrous ZnCl₂ and conc. HCl. The organic compound (A) is :

A

B

C

D

Question 174: Palette 174/253

JEE Mains 2020 MCQ

[P] on treatment with Br₂/FeBr₃ in CCl₄ produced a single isomer C₈H₇O₂Br while heating [P] with sodalime gave toluene. The compound [P] is

A

B

C

D

Question 175: Palette 175/253

JEE Mains 2020 MCQ

Consider the following molecules and statements related to them :
(a) (B) is more likely to be crystalline than (A)
(b) (B) has higher boiling point than (A)
(c) (B) dissolves more readily than (A) in water

Identify the correct option from below :

A

only (a) is true

B

(a), (b) and (c) are true

C

(b) and (c) are true

D

(a) and (b) are true

Question 176: Palette 176/253

JEE Mains 2020 MCQ

The compound A in the following reaction is :

A

B

C

D

Question 177: Palette 177/253

JEE Mains 2020 MCQ

The increasing order of the reactivity of the following compound in nucleophilic addition reaction is :

Propanal, Benzaldehyde, Propanone, Butanone

A

Butanone < Propanone < Benzaldehyde < Propanal

B

Benzaldehyde < Butanone < Propanone < Propanal

C

Propanal < Propanone < Butanone < Benzaldehyde

D

Benzaldehyde < Propanal < Propanone < Butanone

Question 178: Palette 178/253

JEE Mains 2020 MCQ

Two compounds A and B with same molecular formula (C₃H₆O) undergo Grignard’s reaction with methylmagnesium bromide to give products C and D. Products C and D show following chemical tests.
C and D respectively are :

A

B

C

D

Question 179: Palette 179/253

JEE Mains 2020 MCQ

Arrange the following labelled hydrogens in decreasing order of acidity :

A

b > c > d > a

B

b > a > c > d

C

c > b > d > a

D

c > b > a > d

Question 180: Palette 180/253

JEE Mains 2020 MCQ

The increasing order of the following compounds towards HCN addition is :

A

(iii) < (iv) < (ii) < (i)

B

(i) < (iii) < (iv) < (ii)

C

(iii) < (i) < (iv) < (ii)

D

(iii) < (iv) < (i) < (ii)

Question 181: Palette 181/253

JEE Mains 2020 MCQ

In the following reaction A is :

A

B

C

D

Question 182: Palette 182/253

JEE Mains 2020 MCQ

Identify (A) in the following reaction sequence :

A

B

C

D

Question 183: Palette 183/253

JEE Mains 2020 MCQ

An unsaturated hydrocarbon X absorbs two hydrogen molecules on catalytic hydrogenation and also gives following reaction : B(3 - oxo - hexanedicarboxylic acid) X will be :-

A

B

C

D

Question 184: Palette 184/253

JEE Mains 2020 MCQ

The most suitable reagent for the given conversion is :

A

LiAlH₄

B

B₂H₆

C

NaBH₄

D

H₂/Pd

Question 185: Palette 185/253

JEE Mains 2020 MCQ

The predominant intermolecular forces present in ethyl acetate, a liquid, are:

A

Dipole-dipole and hydrogen bonding

B

hydrogen bonding and London dispersion

C

London dispersion, dipole-dipole and hydrogen bonding

D

London dispersion and dipole-dipole

Question 186: Palette 186/253

JEE Mains 2020 MCQ

What is the product of following reaction ?

A

B

C

D

Question 187: Palette 187/253

JEE Mains 2020 MSQ

An organic compound [A], molecular formula C₁₀H₂₀O₂ was hydrolyzed with dilute sulphuric acid to give a carboxylic acid [B] and an alcohol [C]. Oxidation of [C] with
CrO₃ - H₂SO₄ produced [B]. Which of the following strucutres are not possible for [A]?

A

(CH₃)₃ – C – COOCH₂C(CH₃)₃

B

CH₃CH₂CH₂COOCH₂CH₂CH₂CH₃

C

D

Question 188: Palette 188/253

JEE Mains 2019 MCQ

The major products of the following reaction are :

A

B

C

D

Question 189: Palette 189/253

JEE Mains 2019 MCQ

The major product(s) obtained in the following reaction is/are :

A

B

C

D

Question 190: Palette 190/253

JEE Mains 2019 MCQ

Compound A(C₉H₁₀O) shows positive iodoform test. Oxidation of A with KMnO₄/KOH given acid B(C₈H₆O₄). Anhydride of B is used for the preparation of phenolphthalein. Compound A is:

A

B

C

D

Question 191: Palette 191/253

JEE Mains 2019 MCQ

The major product 'Y' in the following reaction is :

A

B

C

D

Question 192: Palette 192/253

JEE Mains 2019 MCQ

Major products of the following reaction are :

A

B

C

D

CH₃OH and HCO₂H

Question 193: Palette 193/253

JEE Mains 2019 MCQ

p-Hydroxybenzophenone upon reaction with bromine in carbon tetrachloride gives:

A

B

C

D

Question 194: Palette 194/253

JEE Mains 2019 MCQ

The major product of the following reaction is:

A

B

C

D

Question 195: Palette 195/253

JEE Mains 2019 MCQ

In the following reaction Rate of the reaction is the highest for :

A

Propanal as substrate and methanol in stoichiometric amount.

B

Acetone as substrate and methanol in stoichiometric amount

C

Propanal as substrate and methanol in excess

D

Acetone as substrate and methanol in excess

Question 196: Palette 196/253

JEE Mains 2019 MCQ

The major product of the following reaction is :

A

B

C

D

Question 197: Palette 197/253

JEE Mains 2019 MCQ

The major product obtained in the following reaction is

A

B

C

D

Question 198: Palette 198/253

JEE Mains 2019 MCQ

The major product of the following reaction is :

A

B

C

D

Question 199: Palette 199/253

JEE Mains 2019 MCQ

The major product of the following reaction is :

A

B

C

D

Question 200: Palette 200/253

JEE Mains 2019 MCQ

The aldehydes which will not form Grignard product with one equivalent Grignard reagents are -

A

B and D

B

C and D

C

B, C and D

D

B and C

Question 201: Palette 201/253

JEE Mains 2019 MCQ

The major product of the following reaction is –

A

B

C

D

Question 202: Palette 202/253

JEE Mains 2019 MCQ

In the following reaction :

Aldehyde + Alcohol   $\buildrel {HCl} \over \longrightarrow $  Acetal

Aldehyde			Alcohol
HCHO			tBuOH
CH3CHO			MeOH

The best combination is

A

CH₃CHO and MeOH

B

HCHO and MeOH

C

CH₃CHO and tBuOH

D

HCHO and tBuOH

Question 203: Palette 203/253

JEE Mains 2019 MCQ

The major product of the following reaction is –

A

B

C

D

Question 204: Palette 204/253

JEE Mains 2019 MCQ

In the following reaction, products A and B are –

A

B

C

D

Question 205: Palette 205/253

JEE Mains 2019 MCQ

The major product obtained in the following conversion is

A

B

C

D

Question 206: Palette 206/253

JEE Mains 2019 MCQ

The major product obtained in the following reaction is :

A

B

C

D

Question 207: Palette 207/253

JEE Mains 2019 MCQ

The major product of the following reaction is :

A

B

C

D

Question 208: Palette 208/253

JEE Mains 2019 MCQ

What will be the major product in the following mononitration reaction ?

A

B

C

D

Question 209: Palette 209/253

JEE Mains 2019 MCQ

Which is the most suitable reagent for the following transformation ?

A

alkaline KMnO₄

B

Tollen's reagent

C

I₂/NaOH

D

CrO₂Cl₂/CS₂

Question 210: Palette 210/253

JEE Mains 2019 MCQ

The major product obtained in the following reaction is :

A

B

C

D

Question 211: Palette 211/253

JEE Mains 2019 MCQ

The decreasing order of ease of alkaline hydrolysis for the following esters in

A

III > II > IV > I

B

IV > II > III > I

C

III > II > I > IV

D

II > III > I > IV

Question 212: Palette 212/253

JEE Mains 2019 MCQ

Which dicarboxylic acid in presence of a dehydrating agent is least reactive to give an anhydride?

A

B

C

D

Question 213: Palette 213/253

JEE Mains 2019 MCQ

The major product in the following reaction is :

A

B

C

D

Question 214: Palette 214/253

JEE Mains 2019 MCQ

The products formed in the reaction of cumene with O₂ followed by treatment with dil. HCl are :

A

B

C

D

Question 215: Palette 215/253

JEE Mains 2019 MCQ

The major product of the following reaction is :

A

B

C

D

Question 216: Palette 216/253

JEE Mains 2019 MCQ

The correct match between Item I and Item II is :

Item - I		Item - II
(A)	Benzaldehyde	(P)	Mobile phase
(B)	Alumina	(Q)	Adsorbent
(C)	Acetonitrile	(R)	Adsorbate

A

(A) $ \to $ (Q); (B) $ \to $ (P); (C) $ \to $ (R)

B

(A) $ \to $ (R); (B) $ \to $ (Q); (C) $ \to $ (P)

C

(A) $ \to $ (Q); (B) $ \to $ (R); (C) $ \to $ (P)

D

(A) $ \to $ (P); (B) $ \to $ (R); (C) $ \to $ (Q)

Question 217: Palette 217/253

JEE Mains 2018 MCQ

Which of the following compounds will most readily be dehydrated to give alkene under acidic condition ?

A

1- Pentanol

B

4-Hydroxypentan - 2-one

C

3-Hydroxypentan - 2-one

D

2-Hydroxycyclopentanone

Question 218: Palette 218/253

JEE Mains 2018 MCQ

The major product B formed in the following reaction sequence is :

A

B

C

D

Question 219: Palette 219/253

JEE Mains 2018 MCQ

The major product of the following reaction is :

A

B

C

D

Question 220: Palette 220/253

JEE Mains 2018 MCQ

The increasing order of the acidity of the following carboxylic acids is :

A

I   <   III   <   II   <   IV

B

IV   <   II   <   III   <   I

C

II   <   IV   <   III   <   I

D

III   <   II   <   IV   <   I

Question 221: Palette 221/253

JEE Mains 2018 MCQ

The major product formed in the following reaction is :

A

B

C

D

Question 222: Palette 222/253

JEE Mains 2018 MCQ

The main reduction product of the following compound with NaBH₄ in methanol is :

A

B

C

D

Question 223: Palette 223/253

JEE Mains 2018 MCQ

The reagent(s) required for the following conversion are :

A

(i) B₂H₆;    (ii) SnCl₂/HCl;    (iii) H₃O⁺

B

(i) LiAlH₄;   (ii) H₃O⁺  

C

(i) B₂H₆;   (ii) DIBALH;   (iii) H₃O⁺

D

(i) NaBH₄;   (ii) Raney Ni/H₂;    (iii) H₃O⁺

Question 224: Palette 224/253

JEE Mains 2017 MCQ

A compound of molecular formula C₈H₈O₂ reacts with acetophenone to form a single cross-aldol product in the presence of base. The same compound on reaction with conc. NaOH forms benzyl alcohol as one of the products. The structure of the compound is :

A

B

C

D

Question 225: Palette 225/253

JEE Mains 2017 MCQ

The correct sequence of reagents for the following conversion will be :

A

CH₃MgBr, H⁺/ CH₃OH, [Ag(NH₃)₂]⁺OH^-

B

[Ag(NH₃)₂]⁺OH^-, CH₃MgBr, H⁺/ CH₃OH

C

[Ag(NH₃)₂]⁺OH^-, H⁺/ CH₃OH, CH₃MgBr

D

CH₃MgBr, [Ag(NH₃)₂]⁺OH^-, H⁺/ CH₃OH

Question 226: Palette 226/253

JEE Mains 2017 MCQ

The major product obtained in the following reaction is :

A

B

C

D

Question 227: Palette 227/253

JEE Mains 2016 MCQ

The correct statement about the synthesis of erythritol (C(CH₂OH)4) used in the preparation of PETN is :

A

The synthesis requires four aldol condensations between methanol and ethanol.

B

The synthesis requires two aldol condensations and two Cannizzaro reactions.

C

The synthesis requires three aldol condensations and one Cannizzaro reaction.

D

Alpha hydrogens of ethanol and methanol are involved in this reaction.

Question 228: Palette 228/253

JEE Mains 2015 MCQ

Which compound would give $5$ - keto - $2$ - methylhexanal upon ozonolysis?

A

B

C

D

Question 229: Palette 229/253

JEE Mains 2015 MCQ

In the following sequence of reactions:


The product C is

A

C₆H₅CH₃

B

C₆H₅CH₂OH

C

C₆H₅CHO

D

C₆H₅COOH

Question 230: Palette 230/253

JEE Mains 2014 MCQ

In the reaction,

the product C is:

A

Ethylene

B

Acetyl chloride

C

Acetaldehyde

D

Acetylene

Question 231: Palette 231/253

JEE Mains 2014 MCQ

Sodium phenoxide when heated with $C{O_2}$ under pressure at ${125^ \circ }C$ yields a product which on acetylation products $C.$



The major product $C$ would be

A

B

C

D

Question 232: Palette 232/253

JEE Mains 2012 MCQ

In the given transformation, which of the following is the most appropriate reagent ?

A

$N{H_2}N{H_2},\mathop {OH}\limits^\Theta $

B

$Zn - Hg/HCl$

C

$Na,Liq\,N{H_3}$

D

$NaB{H_4}$

Question 233: Palette 233/253

JEE Mains 2011 MCQ

The strongest acid amongst the following compounds is :

A

HCOOH

B

CH₃CH₂CH(Cl)CO₂H

C

ClCH₂CH₂CH₂COOH

D

CH₃COOH

Question 234: Palette 234/253

JEE Mains 2011 MCQ

Trichloroacetaldehyde was subjected to Cannizzaro’s reaction by using NaOH. The mixture of the products contains sodium trichloroacetate and another compound. The other compound is :

A

Trichloromethanol

B

2, 2, 2-Trichloropropanol

C

Chloroform

D

2, 2, 2-Trichloroethanol

Question 235: Palette 235/253

JEE Mains 2011 MCQ

Sodium ethoxide has reacted with ethanoyl chloride. The compound that is produced in the above reaction is

A

2-Butanone

B

Ethyl chloride

C

Ethyl ethanoate

D

Diethyl ether

Question 236: Palette 236/253

JEE Mains 2011 MSQ

Silver Mirror test is given by which one of the following compounds ?

A

Acetone

B

Formaldehyde

C

Benzophenone

D

Acetaldehyde

Question 237: Palette 237/253

JEE Mains 2010 MCQ

One mole of a symmetrical alkene on ozonolysis gives two moles of an aldehyde having a molecular mass of 44 u. The alkene is

A

propene

B

1–butene

C

2–butene

D

ethene

Question 238: Palette 238/253

JEE Mains 2009 MCQ

A liquid was mixed with ethanol and a drop of concentrated H₂SO₄ was added. A compound with a fruity smell was formed. The liquid was :

A

CH₃OH

B

HCHO

C

CH₃CO CH₃

D

CH₃COOH

Question 239: Palette 239/253

JEE Mains 2009 MCQ

In Cannizzaro reaction given below
2PhCHO $\buildrel {\mathop {:OH}\limits^{\left( - \right)} } \over \longrightarrow $ PhCH₂OH + $PhC\mathop O\limits^{..} $₂^(-)
the slowest step is :

A

the transfer of hydride to the carbonyl group

B

the abstraction of proton from the carboxylic group

C

the attack of $:\mathop {OH}\limits^{( - )} $ at the carboxyl group

D

the deprotonation of Ph CH₂OH

Question 240: Palette 240/253

JEE Mains 2007 MCQ

The compound formed as a result of oxidation of ethyl benzene by KMnO₄ is :

A

benzophenone

B

acetophenone

C

benzoic acid

D

benzyl alcohol

Question 241: Palette 241/253

JEE Mains 2006 MCQ

The increasing order of the rate of HCN addition to compounds A – D is
(A) HCHO
(B) CH₃COCH₃
(C) PhCOCH₃
(D) PhCOPh

A

A < B < C < D

B

D < B < C < A

C

D < C < B < A

D

C < D < B < A

Question 242: Palette 242/253

JEE Mains 2006 MCQ

The correct order of increasing acid strength of the compounds

A

$D < A < B < C$

B

$A < D < B < C$

C

$B < D < A < C$

D

$D < A < C < B$

Question 243: Palette 243/253

JEE Mains 2005 MCQ

Among the following acids which has the lowest pK_a value?

A

CH₃COOH

B

HCOOH

C

(CH₃)₂COOH

D

CH₃CH₂COOH

Question 244: Palette 244/253

JEE Mains 2005 MCQ

$p$-cresol reacts with chloroform in alkaline medium to give the compound A which adds hydrogen cyanide to form, the compound $B.$ The latter on acidic hydrolysis gives chiral carboxylic acid. The structure of the carboxylic acid is :

A

B

C

D

Question 245: Palette 245/253

JEE Mains 2005 MCQ

Reaction of cyclohexanone with dimethylamine in the presence of catalytic amount of an acid forms a compound if water during the reaction is continuously removed. The compound formed is generally known as

A

a Schiff’s base

B

an enamine

C

an imine

D

an amine

Question 246: Palette 246/253

JEE Mains 2004 MCQ

Which of the following undergoes reaction with 50% sodium hydroxide solution to give the corresponding alcohol and acid?

A

Phenol

B

Benzoic acid

C

Butanal

D

Benzaldehyde

Question 247: Palette 247/253

JEE Mains 2004 MCQ

Which one of the following reduced with zinc and hydrochloric acid to give the corresponding hydrocarbon?

A

Ethyl acetate

B

Butan -2-one

C

Acetamide

D

Acetic acid

Question 248: Palette 248/253

JEE Mains 2004 MCQ

On mixing ethyl acetate with aqueous sodium chloride, the composition of the resultant solution is

A

CH₃COOC₂H₅ + NaCl

B

CH₃Cl + C₂H₅COONa

C

CH₃COCl + C₂H₅OH + NaOH

D

CH₃COONa + C₂H₅OH

Question 249: Palette 249/253

JEE Mains 2003 MCQ

When CH₂ = CH - COOH is reduced with LiAlH₄, the compound obtained will be

A

CH₂ = CH - CH₂OH

B

CH₃ - CH₂ - CH₂OH

C

CH₃ - CH₂ - CHO

D

CH₃ - CH₂ - COOH

Question 250: Palette 250/253

JEE Mains 2003 MCQ

The reaction of chloroform with alcoholic $KOH$ and p-toluidine forms

A

B

C

D

Question 251: Palette 251/253

JEE Mains 2002 MCQ

What is B?

A

CH₃CH₂COCl

B

CH₃CH₂CHO

C

CH₂ = CHCOOH

D

ClCH₂CH₂COOH

Question 252: Palette 252/253

JEE Mains 2002 MCQ

Picric acid is :

A

B

C

D

Question 253: Palette 253/253

JEE Mains 2002 MCQ

A

B

C

D