Question 1: Palette 1/149

JEE Mains 2026 MCQ

$ \text {Arrange the following alkenes in decreasing order of stability. } $

Choose the correct answer from the options given below:

A

III $>$ I $>$ II $>$ IV

B

III $>$ II $>$ I $>$ IV

C

I $>$ III $>$ II $>$ IV

D

$\mathrm{I}>\mathrm{III}>\mathrm{IV}>\mathrm{II}$

Question 2: Palette 2/149

JEE Mains 2026 MCQ

But-2-yne and hydrogen (one mole each) are separately treated with (i) $\mathrm{Pd} / \mathrm{C}$ and (ii) $\mathrm{Na} /$ liq. $\mathrm{NH}_3$ to give the products X and Y respectively.

Identify the incorrect statements.

A. X and Y are stereoisomers.

B. Dipole moment of $X$ is zero.

C. Boiling point of X is higher than Y .

D. X and Y react with $\mathrm{O}_3 / \mathrm{Zn}+\mathrm{H}_2 \mathrm{O}$ to give different products.

Choose the correct answer from the options given below :

A

B and D Only

B

A and C Only

C

A and B Only

D

B and C Only

Question 3: Palette 3/149

JEE Mains 2026 MCQ

$ \text { The final product }[\mathrm{B}] \text { is : } $

A

B

C

D

Question 4: Palette 4/149

JEE Mains 2026 MCQ

Consider the following reaction :

The product Y formed is :

A

2-methylhex-3-yne

B

5-methylhex-2-yne

C

Isopropylbut-1-yne

D

2-methylhex-2-yne

Question 5: Palette 5/149

JEE Mains 2026 MCQ

The dibromo compound $[\mathrm{P}]$ (molecular formula: $\mathrm{C}_9 \mathrm{H}_{10} \mathrm{Br}_2$ ) when heated with excess sodamide followed by treatment with dilute HCl gives [Q]. On warming [Q] with mercuric sulphate and dilute sulphuric acid yield $[R]$ which gives positive Iodoform test but negative Tollen's test. The compound $[\mathrm{P}]$ is :

A

B

C

D

Question 6: Palette 6/149

JEE Mains 2026 MCQ

Given below are two statements :

Statement I : Benzene is nitrated to give nitrobenzene, which on further treatment $ \text { with } \mathrm{CH}_3 \mathrm{COCl} / \mathrm{AlCl}_3 \text { will give } $

Statement II : $-\mathrm{NO}_2$ group is a $m$-directing, and deactivating group.

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

A

Statement I is incorrect but Statement II is correct

B

Both Statement I and Statement II are correct

C

Both Statement I and Statement II are incorrect

D

Statement I is correct but Statement II is incorrect

Question 7: Palette 7/149

JEE Mains 2026 MCQ

80 mL of a hydrocarbon on mixing with 264 mL of oxygen in a closed U-tube undergoes complete combustion. The residual gases after cooling to 273 K occupy 224 mL . When the system is treated with KOH solution, the volume decreases to 64 mL . The formula of the hydrocarbon is :

A

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

B

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

C

$\mathrm{C}_4 \mathrm{H}_{10}$

D

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

Question 8: Palette 8/149

JEE Mains 2026 MCQ

$ \text { The major product of which of the following reaction is not obtained by rearrangement reaction? } $

A

B

C

D

Question 9: Palette 9/149

JEE Mains 2026 MCQ

n-Butane on monochlorination under photochemical condition gives an optically active compound " P ". " P " on further chlorination gives dichloro compounds.

The number of dichloro compounds obtained (ignore stereoisomers) is :

A

3

B

4

C

5

D

6

Question 10: Palette 10/149

JEE Mains 2026 MCQ

Given below are two statements :

Statement I : Methane can be prepared by decarboxylation of sodium ethanoate, Kolbe's electrolysis of sodium acetate and reaction of $\mathrm{CH}_3 \mathrm{MgBr}$ with water.

Statement II : Methane cannot be prepared from unsaturated hydrocarbons and by Wurtz reaction.

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 11: Palette 11/149

JEE Mains 2026 MCQ

IUPAC name of the some alkenes are given below.

Find out the correct stability order.

A. 2-Methylbut-2-ene

B. cis-But-2-ene

C. 2,3-Dimethylbut-2-ene

D. Prop-1-ene

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

Question 12: Palette 12/149

JEE Mains 2026 MCQ

Identify the correct IUPAC name of hydrocarbon $(x)$ containing three primary carbon atoms and with molar mass $72 \mathrm{~g} \mathrm{~mol}^{-1}$.

A

1, 1 - Dimethylcyclopropane

B

2, 2 - Dimethylpropane

C

2 - Methylbutane

D

n-pentane

Question 13: Palette 13/149

JEE Mains 2026 MCQ

For the following Friedel Craft's alkylation reaction, which of the statements are correct?

A. Major product is n-propyl benzene.

B. iso-propyl carbocation intermediate is also generated.

C. Multiple substitution is inevitable.

D. Introducing electron-donating substituent on benzene will not produce any alkyl benzene.

Choose the correct answer from the options given below :

A

A and D only

B

B and C only

C

A and C only

D

B and D only

Question 14: Palette 14/149

JEE Mains 2026 MCQ

$ \text { An alkene }(\mathrm{X}) \text { on ozonolysis followed by reduction gives following products. } $

$ \text { The alkene }(\mathrm{X}) \text { is : } $

A

B

C

D

Question 15: Palette 15/149

JEE Mains 2026 MCQ

The compound (X) on

(i) on heating in the presence of anhydrous AlCl₃ and HCl gas gives 2,4-dimethyl pentane

(ii) aromatization gives toluene and

(iii) cyclisation gives methyl cyclohexane

The correct name of compound (X) is:

A

Hept-2-ene

B

Hept-1,3,5-triene

C

Heptane

D

Hept-2,4,6-triene

Question 16: Palette 16/149

JEE Mains 2025 MCQ

The reactions which cannot be applied to prepare an alkene by elimination, are

Choose the correct answer from the options given below:

A

B & E Only

B

B, C & D Only

C

A, C & D Only

D

B & D Only

Question 17: Palette 17/149

JEE Mains 2025 MCQ

Given below are two statements:

Statement I : Ozonolysis followed by treatment with $\mathrm{Zn}, \mathrm{H}_2 \mathrm{O}$ of cis-2-butene gives ethanal.

Statement II : The product obtained by ozonolysis followed by treatment with $\mathrm{Zn}, \mathrm{H}_2 \mathrm{O}$ of 3, 6-dimethyloct-4-ene has no chiral carbon atom.

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

A

Statement I is false but Statement II are true

B

Both Statement I and Statement II are False

C

Statement I is true but Statement II is false

D

Both Statement I and Statement II are true

Question 18: Palette 18/149

JEE Mains 2025 MCQ

Predict the major product of the following reaction sequence:-

A

B

C

D

Question 19: Palette 19/149

JEE Mains 2025 MCQ

$ \text { Which compound would give 3-methyl-6-oxoheptanal upon ozonolysis? } $

A

B

C

D

Question 20: Palette 20/149

JEE Mains 2025 MCQ

Given below are two statements :

Statement (I) : Neopentane forms only one monosubstituted derivative.

Statement (II) : Melting point of neopentane is higher than n-pentane.

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

A

Statement I is incorrect but Statement II is correct

B

Both Statement I and Statement II are correct

C

Statement I is correct but Statement II is incorrect

D

Both Statement I and Statement II are incorrect

Question 21: Palette 21/149

JEE Mains 2025 MCQ

Match List - I with List - II.

List - I (Reaction)		List - II (Name of reaction)
(A)		(I)	Lucas reaction
(B)	$ \mathrm{ArN}_2^{+} \mathrm{X}^{-} \xrightarrow[\mathrm{HCl}]{\mathrm{Cu}} \mathrm{ArCl}+\mathrm{N}_2 \uparrow+\mathrm{CuX} $	(II)	Finkelstein reaction
(C)	$ \mathrm{C}_2 \mathrm{H}_5 \mathrm{Br}+\mathrm{NaI} \xrightarrow[\text { Acetone }]{\text { Dry }} \mathrm{C}_2 \mathrm{H}_5 \mathrm{I}+\mathrm{NaBr} $	(III)	Fittig reaction
(D)	$ \mathrm{CH}_3 \mathrm{C}(\mathrm{OH})\left(\mathrm{CH}_3\right) \mathrm{CH}_3 \xrightarrow[\mathrm{ZnCl}_2]{\mathrm{HCl}} \mathrm{CH}_3 \mathrm{C}(\mathrm{Cl})\left(\mathrm{CH}_3\right) \mathrm{CH}_3 $	(IV)	Gatterman reaction

$ \text { Choose the correct answer from the options given below : } $

A

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

B

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

C

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

D

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

Question 22: Palette 22/149

JEE Mains 2025 MCQ

Total number of sigma (σ) _______ and pi(π) ______ bonds respectively present in hex-1-en-4-yne are:

A

14 and 3

B

11 and 3

C

13 and 3

D

3 and 13

Question 23: Palette 23/149

JEE Mains 2025 MCQ

The product B formed in the following reaction sequence is:

A

B

C

D

Question 24: Palette 24/149

JEE Mains 2025 MCQ

Identify product [A], [B] and [C] in the following reaction sequence.

$\mathrm{CH}_3-\mathrm{C} \equiv \mathrm{CH} \xrightarrow[\mathrm{H}_2]{\mathrm{Pd} / \mathrm{C}}[\mathrm{A}] \xrightarrow[\text { (ii) } \mathrm{Zn}, \mathrm{H}_2 \mathrm{O}]{\text { (i) } \mathrm{O}_3}[\mathrm{~B}]+[\mathrm{C}]$

A

[A]: CH₃—CH=CH₂, [B]: CH₃CHO, [C]: CH₃CH₂OH

B

[A]: CH₃—CH=CH₂, [B]: CH₃CHO, [C]: HCHO

C

[A]: CH₃CH₂CH₃, [B]: CH₃CHO, [C]: HCHO

D

Question 25: Palette 25/149

JEE Mains 2025 MCQ

The product $(\mathrm{A})$ formed in the following reaction sequence is

A

B

C

D

Question 26: Palette 26/149

JEE Mains 2025 MCQ

Match List - I with List - II

	List - I (Isomers of $\mathrm{C}_{10} \mathrm{H}_{14}$ )		List - II (Ozonolysis product)
(A)		(I)
(B)		(II)
(C)		(III)
(D)		(IV)

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

Question 27: Palette 27/149

JEE Mains 2025 MCQ

Match the List - I with List - II

	List - I Name reaction		List - II Product obtainable
(A)	Swarts reaction	(I)	Ethyl benzene
(B)	Sandmeyer's reaction	(II)	Ethyl iodide
(C)	Wurtz Fittig reaction	(III)	Cyanobenzene
(D)	Finkelstein reaction	(IV)	Ethyl fluoride

Choose the correct answer from the options given below:

A

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

B

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

C

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

D

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

Question 28: Palette 28/149

JEE Mains 2025 MCQ

When sec-butylcyclohexane reacts with bromine in the presence of sunlight, the major product is :

A

B

C

D

Question 29: Palette 29/149

JEE Mains 2025 MCQ

The alkane from below having two secondary hydrogens is :

A

2,2,4,5-Tetramethylheptane

B

2,2,4,4-Tetramethylhexane

C

4-Ethyl-3,4-dimethyloctane

D

2,2,3,3-Tetramethylpentane

Question 30: Palette 30/149

JEE Mains 2025 MCQ

Given below are two statements :

Statement I : One mole of propyne reacts with excess of sodium to liberate half a mole of $\mathrm{H}_2$ gas.

Statement II : Four g of propyne reacts with $\mathrm{NaNH}_2$ to liberate $\mathrm{NH}_3$ gas which occupies 224 mL at STP.

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 incorrect but Statement II is correct

C

Both Statement I and Statement II are correct

D

Statement I is correct but Statement II is incorrect

Question 31: Palette 31/149

JEE Mains 2024 MCQ

The incorrect statement regarding ethyne is

A

The carbon - carbon bonds in ethyne is weaker than that in ethene

B

Both carbons are sp hybridised

C

The $\mathrm{C}-\mathrm{C}$ bonds in ethyne is shorter than that in ethene

D

Ethyne is linear

Question 32: Palette 32/149

JEE Mains 2024 MCQ

Identify the product A and product B in the following set of reactions.

A

B

C

D

Question 33: Palette 33/149

JEE Mains 2024 MCQ

Given below are two statements :

Statement (I) : $\mathrm{S}_{\mathrm{N}} 2$ reactions are 'stereospecific', indicating that they result in the formation of only one stereo-isomer as the product.

Statement (II) : $\mathrm{S}_{\mathrm{N}} 1$ reactions generally result in formation of product as racemic mixtures.

In the light of the above statements, choose the correct 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 34: Palette 34/149

JEE Mains 2024 MCQ

In the given compound, the number of 2$^\circ$ carbon atom/s is ________.

A

Two

B

Three

C

Four

D

One

Question 35: Palette 35/149

JEE Mains 2024 MCQ

Consider the above chemical reaction. Product "A" is :

A

B

C

D

Question 36: Palette 36/149

JEE Mains 2024 MCQ

Given below are two statements :

Statement I : Nitration of benzene involves the following step -

Statement II : Use of Lewis base promotes the electrophilic substitution of benzene.

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

Statement I is incorrect but Statement II is correct

D

Both Statement I and Statement II are correct

Question 37: Palette 37/149

JEE Mains 2024 MCQ

In the above chemical reaction sequence "$\mathrm{A}$" and "$\mathrm{B}$" respectively are

A

$\mathrm{H}_2 \mathrm{O}, \mathrm{H}^{+}$ and $\mathrm{NaOH}_{(\mathrm{alc})} / \mathrm{I}_2$

B

$\mathrm{O}_3, \mathrm{Zn} / \mathrm{H}_2 \mathrm{O}$ and $\mathrm{KMnO}_4$

C

$\mathrm{H}_2 \mathrm{O}, \mathrm{H}^{+}$ and $\mathrm{KMnO}_4$

D

$\mathrm{O}_3, \mathrm{Zn} / \mathrm{H}_2 \mathrm{O}$ and $\mathrm{NaOH}_{(\mathrm{alc})} / \mathrm{I}_2$

Question 38: Palette 38/149

JEE Mains 2024 MCQ

In the given reactions identify $A$ and $B$

A

A : n-Pentane    B : Cis - 2 - butene

B

A : 2-Pentyne     B : Cis-2-butene

C

A : n-Pentane     B : trans-2-butene

D

A : 2-Pentyne      B : trans-2-butene

Question 39: Palette 39/149

JEE Mains 2024 MCQ

Acid D formed in above reaction is :

A

Malonic acid

B

Oxalic acid

C

Succinic acid

D

Gluconic acid

Question 40: Palette 40/149

JEE Mains 2024 MCQ

Major product of the following reaction is -

A

B

C

D

Question 41: Palette 41/149

JEE Mains 2024 MCQ

Products A and B formed in the following set of reactions are

A

B

C

D

Question 42: Palette 42/149

JEE Mains 2024 MCQ

Compound A formed in the following reaction reacts with B gives the product C. Find out A and B.

A

$\mathrm{A}=\mathrm{CH}_3-\mathrm{C} \equiv \stackrel{-}{\mathrm{C}} \mathrm{Na}^{+}, \mathrm{B}=\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{Br}$

B

$\mathrm{A}=\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}_2, \mathrm{~B}=\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{Br}$

C

$\mathrm{A}=\mathrm{CH}_3-\mathrm{C} \equiv \stackrel{-}{\mathrm{C}} \mathrm{Na}^{+}, \mathrm{B}=\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_3$

D

$\mathrm{A}=\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_3, \mathrm{~B}=\mathrm{CH}_3-\mathrm{C} \equiv \mathrm{CH}$

Question 43: Palette 43/149

JEE Mains 2024 MCQ

In the given reactions, identify the reagent A and reagent B.

A

$\mathrm{A}-\mathrm{CrO}_3 \quad \mathrm{~B}-\mathrm{CrO}_3$

B

$\mathrm{A}-\mathrm{CrO}_3 \quad \mathrm{~B}-\mathrm{CrO}_2 \mathrm{Cl}_2$

C

A- $\mathrm{CrO}_2 \mathrm{Cl}_2 \quad \mathrm{~B}-\mathrm{CrO}_3$

D

$\mathrm{A}-\mathrm{CrO}_2 \mathrm{Cl}_2 \quad \mathrm{~B}-\mathrm{CrO}_2 \mathrm{Cl}_2$

Question 44: Palette 44/149

JEE Mains 2024 MCQ

Identify product A and product B :

A

B

C

D

Question 45: Palette 45/149

JEE Mains 2024 MCQ

The final product A formed in the following multistep reaction sequence is

A

B

C

D

Question 46: Palette 46/149

JEE Mains 2024 MCQ

The final product A, formed in the following reaction sequence is:

A

B

C

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

D

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

Question 47: Palette 47/149

JEE Mains 2023 MCQ

The product formed in the following multistep reaction is :

A

B

C

$\mathrm{CH}_{3}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{CH}_{2}-\mathrm{OH}$

D

Question 48: Palette 48/149

JEE Mains 2023 MCQ

In the above reaction, left hand side and right hand side rings are named as '$\mathrm{A}$' and 'B' respectively. They undergo ring expansion. The correct statement for this process is:

A

Finally both rings will become six membered each.

B

Only A will become 6 membered.

C

Ring expansion can go upto seven membered rings

D

Finally both rings will become five membered each.

Question 49: Palette 49/149

JEE Mains 2023 MCQ

The major product formed in the following reaction is

Choose the correct answer from the options given below :

A

D only

B

B only

C

A only

D

C only

Question 50: Palette 50/149

JEE Mains 2023 MCQ

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

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

A is false but R is true

C

A is true but R is false

D

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

Question 51: Palette 51/149

JEE Mains 2023 MCQ

Find out the major product from the following reaction.

A

B

C

D

Question 52: Palette 52/149

JEE Mains 2023 MCQ

In the following reaction, 'B' is

A

B

C

D

Question 53: Palette 53/149

JEE Mains 2023 MCQ

'$\mathrm{X}$' is :

A

B

C

D

Question 54: Palette 54/149

JEE Mains 2023 MCQ

But-2-yne is reacted separately with one mole of Hydrogen as shown below :

A. A is more soluble than B.

B. The boiling point & melting point of A are higher and lower than B respectively.

C. A is more polar than B because dipole moment of A is zero.

D. $\mathrm{Br_2}$ adds easily to B than A.

Identify the incorrect statements from the options given below :

A

A and B only

B

A, C & D only

C

B, C & D only

D

C and D only

Question 55: Palette 55/149

JEE Mains 2023 MCQ

A hydrocarbon ' $\mathrm{X}$ ' with formula $\mathrm{C}_{6} \mathrm{H}_{8}$ uses two moles of $\mathrm{H}_{2}$ on catalytic hydrogenation of its one mole. On ozonolysis, ' $\mathrm{X}$ ' yields two moles of methane dicarbaldehyde. The hydrocarbon ' $\mathrm{X}$ ' is:

A

hexa-1, 3, 5-triene

B

cyclohexa-1, 4-diene

C

cyclohexa - 1,3 - diene

D

1-methylcyclopenta-1, 4-diene

Question 56: Palette 56/149

JEE Mains 2023 MCQ

Choose the correct set of reagents for the following conversion.

trans $\left(\mathrm{Ph}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_{3}\right) \rightarrow \operatorname{cis}\left(\mathrm{Ph}-\mathrm{CH}=\mathrm{CH}-\mathrm{CH}_{3}\right)$

A

$\mathrm{Br_2,alc\cdot KOH,NaNH_2,H_2}$ Lindlar Catalyst

B

$\mathrm{Br_2,aq\cdot KOH,NaNH_2,Na}$ (Liq NH$_3$)

C

$\mathrm{Br_2,alc\cdot KOH,NaNH_2,Na}$ (Liq NH$_3$)

D

$\mathrm{Br_2,aq\cdot KOH,NaNH_2,H_2}$ Lindlar Catalyst

Question 57: Palette 57/149

JEE Mains 2023 MCQ

The major products 'A' and 'B', respectively, are

A

B

C

D

Question 58: Palette 58/149

JEE Mains 2023 MCQ

The one giving maximum number of isomeric alkenes on dehydrohalogenation reaction is (excluding rearrangement)

A

2-Bromo-3,3-dimethylpentane

B

2-Bromopropane

C

1-Bromo-2-methylbutane

D

2-Bromopentane

Question 59: Palette 59/149

JEE Mains 2023 MCQ

The correct sequence of reagents for the preparation of Q and R is :

A

$\mathrm{(i)C{r_2}{O_3},770K,20~atm; (ii)Cr{O_2}C{l_2},{H_3}{O^ + }; (iii)NaOH;(iv){H_3}{O^ + }}$

B

$\mathrm{(i)Cr{O_2}C{l_2},{H_3}{O^ + };(ii)C{r_2}{O_3},770K,20~atm;(iii)NaOH;(iv){H_3}{O^ + }}$

C

$\mathrm{(i)KMn{O_4},O{H^ - };(ii)M{o_2}{O_3},\Delta ;(iii)NaOH;(iv){H_3}{O^ + }}$

D

$\mathrm{(i)M{o_2}{O_3},\Delta ;(ii)Cr{O_2}C{l_2},{H_3}{O^ + };(iii)NaOH;(iv){H_3}{O^ + }}$

Question 60: Palette 60/149

JEE Mains 2023 MCQ

Find out the major products from the following reactions.

A

B

C

D

Question 61: Palette 61/149

JEE Mains 2023 MCQ

In the following given reaction, 'A' is

A

B

C

D

Question 62: Palette 62/149

JEE Mains 2022 MCQ

$ \stackrel{\bullet}{\mathrm{Cl}}+\mathrm{CH}_{4} \rightarrow \mathrm{A}+\mathrm{B} $

A and B in the above atmospheric reaction step are :

A

$\mathrm{C}_{2} \mathrm{H}_{6}$ and $\mathrm{Cl}_{2}$

B

$\stackrel{\bullet}{\mathrm{C}} \mathrm{HCl}_{2}$ and $\mathrm{H}_{2}$

C

$\stackrel{\bullet}{\mathrm{C}}\mathrm{H}_{3}$ and $\mathrm{HCl}$

D

$\mathrm{C}_{2} \mathrm{H}_{6}$ and $\mathrm{HCl}$

Question 63: Palette 63/149

JEE Mains 2022 MCQ

Major product of the following reaction is

A

B

C

D

Question 64: Palette 64/149

JEE Mains 2022 MCQ

A compound ‘$\mathrm{A}$’ on reaction with ‘$\mathrm{X}$’ and ‘$\mathrm{Y}$’ produces the same major product but different by product '$a$' and '$b^{\prime}$. Oxidation of '$a$' gives a substance produced by ants.

'X' and 'Y' respectively are

A

$\mathrm{KMnO}_{4} / \mathrm{H}^{+}$ and dil. $\mathrm{KMnO}_{4^{\prime}} \,273 \mathrm{~K}$

B

$\mathrm{KMnO}_{4}$ (dilute), $273 \mathrm{~K}$ and $\mathrm{KMnO}_{4} / \mathrm{H}^{+}$

C

$\mathrm{KMnO}_{4} / \mathrm{H}^{+}$ and $\mathrm{O}_{3}, \mathrm{H}_{2} \mathrm{O} / \mathrm{Zn}$

D

$\mathrm{O}_{3}, \mathrm{H}_{2} \mathrm{O} / \mathrm{Zn}$ and $\mathrm{KMnO}_{4} / \mathrm{H}^{+}$

Question 65: Palette 65/149

JEE Mains 2022 MCQ

Two isomers 'A' and 'B' with molecular formula C₄H₈ give different products on oxidation with KMnO₄ in acidic medium. Isomer 'A' on reaction with KMnO₄/H⁺ results in effervescence of a gas and gives ketone. The compound 'A' is

A

But-1-ene.

B

cis-But-2-ene.

C

trans-But-2-ene.

D

2-methyl propene.

Question 66: Palette 66/149

JEE Mains 2022 MCQ

What will be the major product of following sequence of reactions?

A

B

C

D

Question 67: Palette 67/149

JEE Mains 2022 MCQ

Product 'A' of following sequence of reactions is

A

B

C

D

Question 68: Palette 68/149

JEE Mains 2022 MCQ

The major product in the following reaction

A

B

C

D

Question 69: Palette 69/149

JEE Mains 2022 MCQ

The product formed in the following reaction.

A

B

C

D

Question 70: Palette 70/149

JEE Mains 2022 MCQ

Given below are two statements :

Statement I : The presence of weaker $\pi$-bonds make alkenes less stable than alkanes.

Statement II : The strength of the double bond is greater than that of carbon-carbon single bond.

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

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 71: Palette 71/149

JEE Mains 2022 MCQ

Which of the following reagents / reactions will convert 'A' to 'B' ?

A

PCC oxidation

B

Ozonolysis

C

BH₃, H₂O₂/^$-$OH followed by PCC oxidation

D

HBr, hydrolysis followed by oxidation by K₂Cr₂O₇.

Question 72: Palette 72/149

JEE Mains 2021 MCQ

The stereoisomers that are formed by electrophilic addition of bromine to trans-but-2-ene is/are :

A

2 enantiomers and 2 mesomers

B

2 identical mesomers

C

2 enantiomers

D

1 racemic and 2 enantiomers

Question 73: Palette 73/149

JEE Mains 2021 MCQ

For the following sequence of reactions, the correct products are :

A

B

C

D

Question 74: Palette 74/149

JEE Mains 2021 MCQ

The correct sequence of correct reagents for the following transformation is :

A

(i) Fe, HCl

(ii) Cl₂, HCl

(iii) NaNO₂, HCl, 0$^\circ$C

(iv) H₂O/H⁺

B

(i) Fe, HCl

(ii) NaNO₂, HCl, 0$^\circ$C

(iii) H₂O/H⁺

(iv) Cl₂, FeCl₃

C

(i) Cl₂, FeCl₃

(ii) Fe, HCl

(iii) NaNO₂, HCl, 0$^\circ$C

(iv) H₂O/H⁺

D

(i) Cl₂, FeCl₃

(ii) NaNO₂, HCl, 0$^\circ$C

(iii) Fe, HCl

(iv) H₂O/H⁺

Question 75: Palette 75/149

JEE Mains 2021 MCQ

Presence of which reagent will affect the reversibility of the following reaction, and change it to a irreversible reaction :

CH₄ + I₂ $\mathrel{\mathop{\kern0pt\rightleftharpoons} \limits_{{\mathop{\rm Re}\nolimits} versible}^{hv}} $ CH₃ $-$ I + HI

A

HOCl

B

dilute HNO₂

C

Liquid NH₃

D

Concentrated HIO₃

Question 76: Palette 76/149

JEE Mains 2021 MCQ

An organic compound 'A' C₄H₈ on treatment with KMnO₄/H⁺ yields compound 'B' C₃H₆O.

Compound 'A' also yields compound 'B' an ozonolysis. Compound 'A' is :

A

2-Methylpropene

B

1-Methylcyclopropane

C

But-2-ene

D

Cyclobutane

Question 77: Palette 77/149

JEE Mains 2021 MCQ

Metallic sodium does not react normally with :

A

gaseous ammonia

B

But-2-yne

C

Ethyne

D

tert-butyl alcohol

Question 78: Palette 78/149

JEE Mains 2021 MCQ

Benzene on nitration gives nitrobenzene in presence of HNO₃ and H₂SO₄ mixture, where :

A

both H₂SO₄ and HNO₃ act as a bases

B

HNO₃ acts as an acid and H₂SO₄ acts as a base

C

both H₂SO₄ and HNO₃ act as an acids

D

HNO₃ acts as a base and H₂SO₄ acts as an acid

Question 79: Palette 79/149

JEE Mains 2021 MCQ

Major product P of above reaction, is :

A

B

C

D

Question 80: Palette 80/149

JEE Mains 2021 MCQ

For above chemical reactions, identify the correct statement from the following :

A

Both compound 'A' and compound 'B' are dicarboxylic acids

B

Both compound 'A' and compound 'B' are diols

C

Compound 'A' is diol and compound 'B' is dicarboxylic acid

D

Compound 'A' is dicarboxylic acid and compound 'B' is diol

Question 81: Palette 81/149

JEE Mains 2021 MCQ

Match List - I with List - II :

List - I (Chemicals)

(a) Alcoholic potassium hydroxide

(b) Pd/BaSO₄

(c) BHC (Benzene hexachloride)

(d) Polyacetylene

List - II (Use / Preparation / Constituent)

(i) Electrodes in batteries

(ii) Obtained by addition reaction

(iii) Used for $\beta$ - elimination reaction

(iv) Lindlar's catalyst

Choose the most appropriate match :

A

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

B

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

C

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

D

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

Question 82: Palette 82/149

JEE Mains 2021 MCQ

Choose the correct statement regarding the formation of carbocations A and B given.

A

Carbocation A is more stable and formed relatively at faster rate

B

Carbocation B is more stable and formed relatively at slow rate

C

Carbocation B is more stable and formed relatively at faster rate

D

Carbocation A is more stable and formed relatively at slow rate

Question 83: Palette 83/149

JEE Mains 2021 MCQ

Given below are two statements :

Statement I : 2-methylbutane on oxidation with KMnO₄ gives 2-methylbutan-2-ol.

Statement II : n-alkanes can be easily oxidised to corresponding alcohols with KMnO₄.

Choose the correct option :

A

Both statement I and statement II are incorrect

B

Both statement I and statement II are correct

C

Statement I is correct but statement II is incorrect

D

Statement I is incorrect but statement II is correct

Question 84: Palette 84/149

JEE Mains 2021 MCQ

An unsaturated hydrocarbon X on ozonolysis gives A. Compound A when warmed with ammonical silver nitrate forms a bright silver mirror along the sides of the test tube. The unsaturated hydrocarbon X is :

A

HC $ \equiv $ C $-$ CH₂ $-$ CH₃

B

C

CH₃ $-$ C $ \equiv $ C $-$ CH₃

D

Question 85: Palette 85/149

JEE Mains 2021 MCQ

Which of the following is Lindlar catalyst?

A

Partially deactivated palladised charcoal

B

Zinc chloride and HCl

C

Sodium and Liquid NH₃

D

Cold dilute solution of KMnO₄

Question 86: Palette 86/149

JEE Mains 2021 MCQ

In $\mathop C\limits^1 {H_2} = \mathop C\limits^2 = \mathop C\limits^3 H - \mathop C\limits^4 {H_3}$ molecule, the hybridization of carbon 1, 2, 3 and 4 respectively, are :

A

sp², sp, sp², sp³

B

sp², sp², sp², sp³

C

sp³, sp, sp³, sp³

D

sp², sp³, sp², sp³

Question 87: Palette 87/149

JEE Mains 2021 MCQ

The correct sequence of reagents used in the preparation of 4-bromo-2-nitroethyl benzene from benzene is :

A

$C{H_3}COCl/AlC{l_3},B{r_2}/AlB{r_3},HN{O_3}/{H_2}S{O_4},Zn/HCl$

B

$C{H_3}COCl/AlC{l_3},Zn - Hg/HCl,B{r_2}/AlB{r_3},HN{O_3}/{H_2}S{O_4}$

C

$B{r_2}/AlB{r_3},C{H_3}COCl/AlC{l_3},HN{O_3}/{H_2}S{O_4},Zn/HCl$

D

$HN{O_3}/{H_2}S{O_4},B{r_2}/AlC{l_3},C{H_3}COCl/AlC{l_3},Zn - Hg/HCl$

Question 88: Palette 88/149

JEE Mains 2021 MCQ

The major product of the following reaction is :

A

B

C

D

Question 89: Palette 89/149

JEE Mains 2021 MCQ

Identify A in the given chemical reaction.

A

B

C

D

Question 90: Palette 90/149

JEE Mains 2021 MCQ

The correct order of the following compounds showing increasing tendency towards nucleophilic substitution reaction is :

A

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

B

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

C

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

D

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

Question 91: Palette 91/149

JEE Mains 2021 MCQ

Identify products A and B.

A

B

C

D

Question 92: Palette 92/149

JEE Mains 2020 MCQ

The major product obtained from the following reaction is :

A

B

C

D

Question 93: Palette 93/149

JEE Mains 2020 MCQ

The major product of the following reaction is :

A

B

C

D

Question 94: Palette 94/149

JEE Mains 2020 MCQ

Which of the following compounds produces an optically inactive compound on hydrogenation?

A

B

C

D

Question 95: Palette 95/149

JEE Mains 2020 MCQ

The major product in the following reaction is :

A

B

C

D

Question 96: Palette 96/149

JEE Mains 2020 MCQ

The major product (Y) in the following reactions is :

A

B

C

D

Question 97: Palette 97/149

JEE Mains 2020 MCQ

The correct order of heat of combustion for following alkadienes is :

A

(b) < (c) < (a)

B

(a) < (c) < (b)

C

(a) < (b) < (c)

D

(c) < (b) < (a)

Question 98: Palette 98/149

JEE Mains 2020 MCQ

The major product [B] in the following sequence of reactions is :-

A

B

C

D

Question 99: Palette 99/149

JEE Mains 2020 MCQ

The major product in the following reaction is:

A

B

C

D

Question 100: Palette 100/149

JEE Mains 2020 MCQ

In the following reactions sequence, structure of A and B respectively will be :

A

B

C

D

Question 101: Palette 101/149

JEE Mains 2020 MCQ

Consider the following reaction :

${\left( {C{H_3}} \right)_3}CCH\left( {OH} \right)C{H_3}\buildrel {conc.\,\,\,{H_2}S{O_4}} \over \longrightarrow $

${\left( {C{H_3}} \right)_2}CHCH\left( {Br} \right)C{H_3}\buildrel {alc.\,\,KOH} \over \longrightarrow $

${\left( {C{H_3}} \right)_2}{\rm{ }}CHCH\left( {Br} \right)C{H_3}\buildrel {{{(C{H_3})}_3}{O^\Theta }{K^ \oplus }} \over \longrightarrow $

${\left( {C{H_3}} \right)_2}\mathop C\limits_{\mathop |\limits_{OH} } - C{H_2} - CHO\buildrel \Delta \over \longrightarrow $

Which of these reaction(s) will not produce Saytzeff product ?

A

(d) only

B

(b) and (d)

C

(a), (c) and (d)

D

(c) only

Question 102: Palette 102/149

JEE Mains 2019 MCQ

Consider the following reactions :

'A' is :

A

$CH \equiv CH$

B

$C{H_3} - C \equiv C - C{H_3}$

C

$C{H_3} - C \equiv CH$

D

$C{H_2} = C{H_2}$

Question 103: Palette 103/149

JEE Mains 2019 MCQ

In the following skew conformation of ethane, H'–C–C–H'' dihedral angle is :

A

120^o

B

58^o

C

151^o

D

149^o

Question 104: Palette 104/149

JEE Mains 2019 MCQ

The major product of the following addition reaction is :
H₃C–CH=CH₂ $\buildrel {C{l_2}/{H_2}O} \over \longrightarrow $

A

B

C

D

Question 105: Palette 105/149

JEE Mains 2019 MCQ

But-2-ene on reaction with alkaline KMnO₄ at elevated temperature followed by acidification will give :

A

one molecule of CH₃CHO and one molecule of CH₃COOH

B

2 molecules of CH₃COOH

C

D

2 molecules of CH₃CHO

Question 106: Palette 106/149

JEE Mains 2019 MCQ

Increasing order of reactivity of the following compounds for S_N1 substitution is:

A

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

B

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

C

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

D

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

Question 107: Palette 107/149

JEE Mains 2019 MCQ

Which of the following potential energy (PE) diagrams represents the S_N1 reaction?

A

B

C

D

Question 108: Palette 108/149

JEE Mains 2019 MCQ

The major product of the following reaction is :

A

CH₃CD₂CH(Cl)(I)

B

CH₃CD(Cl)CHD(I)

C

CH₃C(I)(Cl)CHD₂

D

CH₃CD(I)CHD(Cl)

Question 109: Palette 109/149

JEE Mains 2019 MCQ

The major product of the following reaction is :

A

B

C

D

Question 110: Palette 110/149

JEE Mains 2019 MCQ

Polysubstitution is a major drawback in:

A

Reimer Tiemann reaction

B

Friedel Craft's alkylation

C

Acetylation of aniline

D

Friedel Craft's acylation

Question 111: Palette 111/149

JEE Mains 2019 MCQ

The major product of the following reaction is :

A

CH₃CH₂C$ \equiv $CH

B

CH₃CH=C=CH₂

C

D

CH₃CH=CHCH₂NH₂

Question 112: Palette 112/149

JEE Mains 2019 MCQ

The major product of the following reaction is –

A

B

C

D

Question 113: Palette 113/149

JEE Mains 2019 MCQ

The major product of the following reaction is –

A

B

C

D

Question 114: Palette 114/149

JEE Mains 2019 MCQ

The correct order for acid strength of compounds :

CH $ \equiv $ CH, CH₃–C $ \equiv $ CH and CH₂ = CH₂ is as follows

A

CH $ \equiv $ CH > CH₂ = CH₂ > CH₃ – C $ \equiv $ CH

B

CH₃ – C $ \equiv $ CH > CH₂ = CH₂ > HC $ \equiv $ CH

C

HC $ \equiv $ CH > CH₃ – C $ \equiv $ CH > CH₂ = CH₂

D

CH₃ – CH $ \equiv $ CH > CH $ \equiv $ CH > CH₂ = CH₂

Question 115: Palette 115/149

JEE Mains 2019 MCQ

The major product of the following reaction is

A

B

C

photo due

D

Question 116: Palette 116/149

JEE Mains 2019 MCQ

Which compound (s) out of the following is/are not aromatic ?

A

(A) and (C)

B

(C) and (D)

C

(B)

D

(B), (C) and (D)

Question 117: Palette 117/149

JEE Mains 2019 MCQ

The major product of the following reaction is

A

B

C

D

Question 118: Palette 118/149

JEE Mains 2019 MCQ

The major product of the following reaction is :

A

B

C

D

Question 119: Palette 119/149

JEE Mains 2018 MCQ

The major product of the following reaction is :

A

B

C

D

Question 120: Palette 120/149

JEE Mains 2018 MCQ

The trans-alkenes are formed by the reduction of alkynes with

A

Sn - HCl

B

H₂ – Pd/C, BaSO₄

C

NaBH₄

D

Na/liq. NH₃

Question 121: Palette 121/149

JEE Mains 2018 MCQ

The major product formed in the following reaction is :

A

B

C

D

Question 122: Palette 122/149

JEE Mains 2018 MCQ

When 2-butyne is treate with H₂/Lindlar's catalyst, compound X is produced as the major product and when treated with Na/liq. NH₃ it produces Y as the major product Which of the following statements is correct ?

A

X will have higher dipole moment and higher boiling point than Y.

B

Y will have higher dipole moment and higher boiling point than X.

C

X will have lower dipole moment and lower boiling point than Y.

D

Y will have higher dipole momet and lower boiling point than X.

Question 123: Palette 123/149

JEE Mains 2018 MCQ

Which of the following will most readily give the dehydrohalogenation product ?

A

B

C

D

Question 124: Palette 124/149

JEE Mains 2017 MCQ

The major product of the following reaction is :

A

B

C

D

Question 125: Palette 125/149

JEE Mains 2016 MCQ

Consider the reaction sequence below :


X is:

A

B

C

D

Question 126: Palette 126/149

JEE Mains 2016 MCQ

5 L of an alkane requires 25 L of oxygen for its complete combustion. If all volumes are measured at constant temperature and pressure, the alkane is :

A

Ethane

B

Propane

C

Butane

D

Isobutane

Question 127: Palette 127/149

JEE Mains 2016 MCQ

The reaction of propene with HOCl (Cl₂ + H₂O) proceeds through the intermediate:

A

$\mathrm{CH}_{3}-\mathrm{CH}^{+}-\mathrm{CH}_{2}-\mathrm{OH}$

B

$\mathrm{CH}_{3}-\mathrm{CHCl}-\mathrm{CH}_{2}^{+}$

C

CH₃ - CH⁺ - CH₂ - OH

D

$\mathrm{CH}_{3}-\mathrm{CH}^{+}-\mathrm{CH}_{2}-\mathrm{Cl}$

Question 128: Palette 128/149

JEE Mains 2016 MCQ

At 300 K and 1 atm, 15 mL of a gaseous hydrocarbon requires 375 mL air containing 20% O₂ by volume for complete combustion. After combustion the gases occupy 345 mL. Assuming that the water formed is in liquid form and the volumes were measured at the same temperature and pressure, the formula of the hydrocarbon is:

A

C₃H₈

B

C₄H₈

C

C₄H₁₀

D

C₃H₆

Question 129: Palette 129/149

JEE Mains 2012 MCQ

Which branched chain isomer of the hydrocarbon with molecular mass 72u gives only one isomer of mono substituted alkyl halide ?

A

Tertiary butyl chloride

B

Neopentane

C

Isohexane

D

Neohexane

Question 130: Palette 130/149

JEE Mains 2012 MCQ

2–Hexyne gives trans–2–Hexene on treatment with :

A

Pt/H₂

B

Li/NH₃

C

Pd/BaSO₄

D

LiAlH₄

Question 131: Palette 131/149

JEE Mains 2011 MCQ

Ozonolysis of an organic compound gives formaldehyde as one of the products. This confirms the presence of :

A

a vinyl group

B

an isopropyl group

C

an acetylenic triple bond

D

two ethylenic double bonds

Question 132: Palette 132/149

JEE Mains 2010 MCQ

The main product of the following reaction is

$\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,\,$ ${C_6}{H_5}C{H_2}CH\left( {OH} \right)CH{\left( {C{H_3}} \right)_2}\buildrel {conc.{H_2}S{O_4}} \over \longrightarrow \,?$

A

B

C

D

Question 133: Palette 133/149

JEE Mains 2008 MCQ

Toluene is nitrated and the resulting product is reduced with tin and hydrochloric acid. The product so obtained is diazotised and then heated with cuprous bromide. The reaction mixture so formed contains

A

mixture of o− and p−bromotoluenes

B

mixture of o− and p−dibromobenzenes

C

mixture of o− and p−bromoanilines

D

mixture of o− and m−bromotoluenes

Question 134: Palette 134/149

JEE Mains 2008 MCQ

The treatment of $C{H_3}MgX\,\,$ with $C{H_3}C \equiv C - H$ produces

A

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

B

$C{H_3}C \equiv C - C{H_3}$

C

D

$C{H_4}$

Question 135: Palette 135/149

JEE Mains 2008 MCQ

The hydrocarbon which can react with sodium in liquid ammonia is

A

CH₃CH₂CH₂C≡CCH₂CH₂CH₃

B

CH₃CH₂C≡CH

C

CH₃CH=CHCH₃

D

CH₃CH₂C≡CCH₂CH₃

Question 136: Palette 136/149

JEE Mains 2008 MCQ

In the following sequence of reactions, the alkene affords the compound ‘B’
CH₃ - CH = CH - CH₃ $\buildrel {{O_3}} \over \longrightarrow $ A $\mathrel{\mathop{\kern0pt\longrightarrow} \limits_{Zn}^{H{}_2O}} $ B
The compound B is

A

CH₃CH₂CHO

B

CH₃COCH₃

C

CH₃CH₂COCH₃

D

CH₃CHO

Question 137: Palette 137/149

JEE Mains 2007 MCQ

Which of the following reactions will yield 2, 2-dibromopropane?

A

CH₃ - CH = CH₂ + HBr $\to$

B

CH₃ - C $\equiv$ CH + 2HBr $\to$

C

CH₃CH = CHBr + HBr $\to$

D

CH $\equiv$ CH + 2HBr $\to$

Question 138: Palette 138/149

JEE Mains 2007 MCQ

The reaction of toluene with Cl₂ in presence of FeCl₃ gives predominantly

A

benzoyl chloride

B

benzyl chloride

C

o-and p-chlorotoluene

D

m-chlorotoluene

Question 139: Palette 139/149

JEE Mains 2006 MCQ

The alkene formed as a major product in the above elimination reaction is

A

B

C

D

Question 140: Palette 140/149

JEE Mains 2005 MCQ

Which types of isomerism is shown by 2,3-dichlorobutane?

A

Diastereo

B

Optical

C

Geometric

D

Structural

Question 141: Palette 141/149

JEE Mains 2005 MCQ

2 methylbutane on reacting with bromine in the presence of sunlight gives mainly

A

1 – bromo -2 - methylbutane

B

2 – bromo -2 - methylbutane

C

2 – bromo -3 - methylbutane

D

1 – bromo -3 – methylbutane

Question 142: Palette 142/149

JEE Mains 2005 MCQ

Of the five isomeric hexanes, the isomer which can give two monochlorinated compounds is

A

n-hexane

B

2, 3-dimethylbutane

C

2,2-dimethylbutane

D

2-methylpentane

Question 143: Palette 143/149

JEE Mains 2005 MCQ

Reaction of one molecule of HBr with one molecule of 1,3-butadiene at 40^oC gives predominantly

A

3-bromobutene under kinetically controlled conditions

B

1-bromo-2-butene under thermodymically controlled conditions

C

3-bromobutene under thermodynamically controlled conditions

D

1-bromo-2-butene under kinetically controlled conditions

Question 144: Palette 144/149

JEE Mains 2004 MCQ

Which one of the following has the minimum boiling point?

A

n-butane

B

isobutane

C

1- butene

D

1- butyne

Question 145: Palette 145/149

JEE Mains 2003 MCQ

On mixing a certain alkane with chlorine and irradiating it with ultravioletlight, it forms only one monochloroalkane. This alkane could be

A

pentane

B

isopentane

C

neopentane

D

propane

Question 146: Palette 146/149

JEE Mains 2003 MCQ

Butene-1 may be converted to butane by reaction with

A

Sn - HCI

B

Zn - Hg

C

Pd/H₂

D

Zn - HCI

Question 147: Palette 147/149

JEE Mains 2002 MCQ

Which of these will not react with acetylene ?

A

NaOH

B

ammonical AgNO₃

C

Na

D

HCl

Question 148: Palette 148/149

JEE Mains 2002 MCQ

What is the product when acetylene reacts with hypochlorous acid ?

A

CH₃COCI

B

ClCH₂CHO

C

Cl₂CHCHO

D

ClCHCOOH

Question 149: Palette 149/149

JEE Mains 2002 MCQ

Acetylene does not react with :

A

$\mathrm{Na}$

B

ammoniacal $\mathrm{AgNO}_3$

C

$\mathrm{HCl}$

D

$\mathrm{NaOH}$