Question 1: Palette 1/178

JEE Mains 2026 MCQ

$\mathrm{Ph}-\mathrm{CH}=\mathrm{CH}_2 \xrightarrow[\mathrm{HBr}]{(\mathrm{PhCOO})_2}$ Product

Consider the above reaction

A. The reaction proceeds through a more stable radical intermediate.

B. The role of peroxide is to generate ${H^ \bullet }$ (Hydrogen radical).

C. During this reaction, benzene is formed as a byproduct.

D. 1-Bromo-2-phenylethane is formed as the minor product.

E. The same reaction in absence of peroxide proceeds via carbocation intermediate.

Identify the correct statements. Choose the correct answer from the options given below :

A

A & E Only

B

A, B & D Only

C

A, C & E Only

D

C, D & E Only

Question 2: Palette 2/178

JEE Mains 2026 MCQ

Consider the following reactions giving major product. Identify the correct reaction.

A

B

C

D

Question 3: Palette 3/178

JEE Mains 2026 MCQ

Given below are two statements :

Statement I : ' $\mathrm{C}-\mathrm{Cl}$ ' bond is stronger in $\mathrm{CH}_2=\mathrm{CH}-\mathrm{Cl}$ than $\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{Cl}$

Statement II : The given optically active molecule, on

hydrolysis gives a solution that can rotate the plane polarized light.

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

A

Statement I is false but Statement II is true

B

Statement I is true but Statement II is false

C

Both Statement I and Statement II are true

D

Both Statement I and Statement II are false

Question 4: Palette 4/178

JEE Mains 2026 MCQ

Match the List-I with List-II

List-I Chloro derivative	List-II Example
A. Vinyl Chloride	I. CH$_2$ = CH - CH$_2$Cl
B. Benzyl Chloride	II. CH$_3$ - CH(Cl)CH$_3$
C. Alkyl Chloride	III. CH$_2$ = CHCl
D. Allyl Chloride	IV.

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

Question 5: Palette 5/178

JEE Mains 2026 MCQ

$ \text { Consider the following compounds } $

$ \text { Arrange these compounds in the increasing order of reactivity with nitrating mixture. } $

A

$c < b < a$

B

$\mathrm{b}<\mathrm{c}<\mathrm{a}$

C

$\mathrm{c}<\mathrm{a}<\mathrm{b}$

D

$\mathrm{b}<\mathrm{a}<\mathrm{c}$

Question 6: Palette 6/178

JEE Mains 2026 MCQ

As compared with chlorocyclohexane, which of the following statements correctly apply to chlorobenzene?

A. The magnitude of negative charge is more on chlorine atom.

B. The $\mathrm{C}-\mathrm{Cl}$ bond has partial double bond character.

C. $\mathrm{C}-\mathrm{Cl}$ bond is less polar.

D. $\mathrm{C}-\mathrm{Cl}$ bond is longer due to repulsion between delocalised electrons of the aromatic ring and lone pairs of electrons of chlorine.

E. The $\mathrm{C}-\mathrm{Cl}$ bond is formed using $\mathrm{sp}^2$ hybridised orbital of carbon.

Choose the correct answer from the options given below :

A

B, C and E Only

B

A, C and E Only

C

B, C and D Only

D

A, D and E Only

Question 7: Palette 7/178

JEE Mains 2026 MCQ

The correct order of the rate of reaction of the following reactants with nucleophile by $\mathrm{S}_{\mathrm{N}} 1$ mechanism is :

(Given : Structures I and II are rigid)

A

I $<$ II $<$ III $<$ IV

B

II $<$ I $<$ III $<$ IV

C

III $<$ I $<$ II $<$ IV

D

IV $<$ III $<$ II $<$ I

Question 8: Palette 8/178

JEE Mains 2026 MCQ

The correct order of reactivity of $\mathrm{CH}_3 \mathrm{Br}$ in methanol with the following nucleophiles is

$\mathrm{F}^{-}, \mathrm{I}^{-}, \mathrm{C}_2 \mathrm{H}_5 \mathrm{O}^{-}$and $\mathrm{C}_6 \mathrm{H}_5 \mathrm{O}^{-}$

A

$\mathrm{I}^{-}>\mathrm{C}_2 \mathrm{H}_5 \mathrm{O}^{-}>\mathrm{C}_6 \mathrm{H}_5 \mathrm{O}^{-}>\mathrm{F}^{-}$

B

$\mathrm{I}^{-}>\mathrm{F}^{-}>\mathrm{C}_6 \mathrm{H}_5 \mathrm{O}^{-}>\mathrm{C}_2 \mathrm{H}_5 \mathrm{O}^{-}$

C

$\mathrm{I}^{-}>\mathrm{C}_6 \mathrm{H}_5 \mathrm{O}^{-}>\mathrm{F}^{-}>\mathrm{C}_2 \mathrm{H}_5 \mathrm{O}^{-}$

D

$\mathrm{I}^{-}>\mathrm{C}_2 \mathrm{H}_5 \mathrm{O}^{-}>\mathrm{F}^{-}>\mathrm{C}_6 \mathrm{H}_5 \mathrm{O}^{-}$

Question 9: Palette 9/178

JEE Mains 2026 MCQ

The correct order of the rate of the reaction for the following reaction with respect to nucleophiles is :

${CH_3Br + Nu^- \longrightarrow CH_3Nu + Br^-}$

A

${ClO_4^- > CH_3COO^- > OH^- > PhO^-}$

B

${OH^- > PhO^- > CH_3COO^- > ClO_4^-}$

C

${CH_3COO^- > PhO^- > OH^- > ClO_4^-}$

D

${PhO^- > OH^- > CH_3COO^- > ClO_4^-}$

Question 10: Palette 10/178

JEE Mains 2026 MCQ

The correct order of reactivity of the following benzyl halides towards reaction with KCN is :

A

a > b > c > d

B

b > a > d > c

C

b > a > c > d

D

a > b > d > c

Question 11: Palette 11/178

JEE Mains 2026 MCQ

Given below are two statements :

Statement I : Due to increase in van der Waals forces, the order of boiling points is $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{CH}_2 \mathrm{I}>\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{I}>\mathrm{CH}_3 \mathrm{I}$.

$ \text { Statement II : } $

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 12: Palette 12/178

JEE Mains 2026 MCQ

Given below are two statements :

Statement I : 3-phenylpropene reacts with HBr and gives secondary alkyl bromide having a chiral carbon atom as the major product.

Statement II : Aryl chlorides and aryl cyanides can be prepared by Sandmeyer reaction as well as Gattermann 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 13: Palette 13/178

JEE Mains 2026 MCQ

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

$ \begin{gathered} \text { List-I } \\ \text { Name of reaction } \end{gathered} $		$ \begin{gathered} \text { List-II } \\ \text { Reagent or catalyst used } \end{gathered} $
A.	Finkelstein reaction	I.	$\mathrm{SbF}_3$
B.	Swarts reaction	II.	Na, dry ether
C.	Sandmeyer's reaction	III.	NaI
D.	Fittig reaction	IV.	$\mathrm{Cu}_2 \mathrm{Cl}_2$

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

Question 14: Palette 14/178

JEE Mains 2026 MCQ

Correct statements regarding alkyl halides (R–X) among the following are :

A. Alcohol being less polar solvent as compared to water, alcoholic KOH favours elimination reaction with R–X.

B. Order of reactivity towards S_N1 mechanism is C₆H₅–CH₂–Cl > C₆H₅–CHCl–C₆H₅.

C. Non substituted aryl halides exhibit properties similar to alkyl halides.

D. Vinyl chloride is an example of haloalkene and allyl chloride is an example of haloalkyne.

E. R–Cl can be prepared by reacting R–OH with SOCl₂ but Ar–Cl cannot be prepared by reacting Ar–OH with SOCl₂.

Choose the correct answer from the options given below :

A

A, B and C Only

B

B and D Only

C

A and E Only

D

D and E Only

Question 15: Palette 15/178

JEE Mains 2026 MCQ

Given below are two statements :

Statement (I) : Benzyl chloride reacts faster in $S_N1$ mechanism than ethyl chloride.

Statement (II) : Ethyl carbocation intermediate is less stabilized by hyperconjugation than benzyl carbocation by resonance.

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 16: Palette 16/178

JEE Mains 2025 MCQ

'P' is

A

B

C

D

Question 17: Palette 17/178

JEE Mains 2025 MCQ

Choose the correct set of reagents for the following conversion.

A

$\mathrm{Cl}_2 /$ anhy $\cdot \mathrm{AlCl}_3 ; \mathrm{Br}_2 / \mathrm{Fe} ;$ alc. KOH

B

$\mathrm{Cl}_2 / \mathrm{Fe} ; \mathrm{Br}_2 /$ anhy. $\mathrm{AlCl}_3$; aq. KOH

C

$\mathrm{Br}_2 / \mathrm{Fe} ; \mathrm{Cl}_2, \Delta$; alc. KOH

D

$\mathrm{Br}_2 /$ anhy. $\mathrm{AlCl}_3 ; \mathrm{Cl}_2, \Delta$; aq. KOH

Question 18: Palette 18/178

JEE Mains 2025 MCQ

Which one of the following reactions will not lead to the desired ether formation in major proportion?

(iso- $\mathrm{Bu} \Rightarrow$ isobutyl, sec $-\mathrm{Bu} \Rightarrow$ sec-butyl, $\mathrm{nPr} \Rightarrow \mathrm{n}$-propyl, $ { }^{\mathrm{t}} \mathrm{Bu} \Rightarrow \text { tert-butyl, } \mathrm{Et} \Rightarrow \text { ethyl) } $

A

B

iso- $\mathrm{Bu} \overline{\mathrm{O}} \stackrel{+}{\mathrm{Na}}+\mathrm{sec}-\mathrm{BuBr} \longrightarrow$ sec- $\mathrm{Bu}-\mathrm{O}-$ iso -Bu

C

D

${ }^{\mathrm{t}}\mathrm{Bu}\overline{\mathrm{O}} \stackrel{+}{\mathrm{Na}}+\mathrm{EtBr} \longrightarrow{ }^{\mathrm{t}} \mathrm{Bu}-\mathrm{O}-\mathrm{Et}$

Question 19: Palette 19/178

JEE Mains 2025 MCQ

Consider the following molecule(X).

The major product formed when the given molecule $(X)$ is treated with $\mathrm{HBr}(1 \mathrm{eq})$ is :

A

B

C

D

Question 20: Palette 20/178

JEE Mains 2025 MCQ

Given below are two statements :

Statement (I) : Alcohols are formed when alkyl chlorides are treated with aqueous potassium hydroxide by elimination reaction.

Statement (II) : In alcoholic potassium hydroxide, alkyl chlorides form alkenes by abstracting the hydrogen from the $\beta$-carbon.

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

Both Statement I and Statement II are correct

C

Statement I is incorrect but Statement II is correct

D

Statement I is correct but Statement II is incorrect

Question 21: Palette 21/178

JEE Mains 2025 MCQ

$ \text {In the following series of reactions identify the major products } \mathrm{A} \& \mathrm{~B} \text { respectively } $

A

B

C

D

Question 22: Palette 22/178

JEE Mains 2025 MCQ

Which among the following halides will generate the most stable carbocation in the nucleophilic substitution reaction?

A

B

C

D

Question 23: Palette 23/178

JEE Mains 2025 MCQ

The major product of the following reaction is:

A

6-Phenylhepta-3,5-diene

B

6-Phenylhepta-2,4-diene

C

2-Phenylhepta-2,4-diene

D

2-Phenylhepta-2,5-diene

Question 24: Palette 24/178

JEE Mains 2025 MCQ

The products A and B in the following reactions, respectively are

$\mathrm{A} \stackrel{\mathrm{Ag}-\mathrm{NO}_2}{\longleftrightarrow} \mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{Br} \xrightarrow{\mathrm{AgCN}} \mathrm{B}$

A

$\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{ONO}, \mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CN}$

B

$\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{NO}_2, \mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CN}$

C

$\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{ONO}, \mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{NC}$

D

$\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{NO}_2, \mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{NC}$

Question 25: Palette 25/178

JEE Mains 2025 MCQ

The structure of the major product formed in the following reaction is :

A

B

C

D

Question 26: Palette 26/178

JEE Mains 2025 MCQ

Given below are two statements:

Statement I: The conversion proceeds well in the less polar medium.

$\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{Cl} \xrightarrow{\mathrm{HO}^{-}} \mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{OH}+\mathrm{Cl}^{(-)}$

Statement II: The conversion proceeds well in the more polar medium.

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

A

Statement I is false but Statement II is true

B

Statement I is true but Statement II is false

C

Both Statement I and Statement II are false

D

Both Statement I and Statement II are true

Question 27: Palette 27/178

JEE Mains 2025 MCQ

Following are the four molecules "P", "Q", "R" and "S".

Which one among the four molecules will react with $\mathrm{H}-\mathrm{Br}_{(\mathrm{aq})}$ at the fastest rate?

A

Q

B

S

C

P

D

R

Question 28: Palette 28/178

JEE Mains 2025 MCQ

Identify the products [A] and [B], respectively in the following reaction:

A

B

C

D

Question 29: Palette 29/178

JEE Mains 2025 MCQ

The ascending order of relative rate of solvolysis of following compounds is :

A

$(\mathrm{C})<(\mathrm{D})<(\mathrm{B})<(\mathrm{A})$

B

$(\mathrm{D})<(\mathrm{A})<(\mathrm{B})<(\mathrm{C})$

C

$(\mathrm{D})<(\mathrm{B})<(\mathrm{A})<(\mathrm{C})$

D

$(\mathrm{C})<(\mathrm{B})<(\mathrm{A})<(\mathrm{D})$

Question 30: Palette 30/178

JEE Mains 2025 MCQ

Propane molecule on chlorination under photochemical condition gives two di-chloro products, " $x$ " and " $y$ ". Amongst " $x$ " and " $y$ ", " $x$ " is an optically active molecule. How many tri-chloro products (consider only structural isomers) will be obtained from " x " when it is further treated with chlorine under the photochemical condition?

A

4

B

2

C

3

D

5

Question 31: Palette 31/178

JEE Mains 2025 MCQ

The maximum number of RBr producing 2-methylbutane by above sequence of reactions is __________ . (Consider the structural isomers only)

A

5

B

3

C

4

D

1

Question 32: Palette 32/178

JEE Mains 2025 MCQ

Given below are two statements :

Statement I : $\quad \mathrm{CH}_3-\mathrm{O}-\mathrm{CH}_2-\mathrm{Cl}$ will undergo $\mathrm{S}_{\mathrm{N}} 1$ reaction though it is a primary halide.

Statement II : will not undergo $\mathrm{S}_{\mathrm{N}} 2$ reaction very easily though it is a primary halide.

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

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 33: Palette 33/178

JEE Mains 2024 MCQ

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

Assertion (A) : $\mathrm{S}_{\mathrm{N}} 2$ reaction of $\mathrm{C}_6 \mathrm{H}_5 \mathrm{CH}_2 \mathrm{Br}$ occurs more readily than the $\mathrm{S}_{\mathrm{N}} 2$ reaction of $\mathrm{CH}_3 \mathrm{CH}_2 \mathrm{Br}$.

Reason (R) : The partially bonded unhybridized p-orbital that develops in the trigonal bipyramidal transition state is stabilized by conjugation with the phenyl ring.

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

A

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

B

Both (A) and (R) are correct and (R) is the correct explanation of (A)

C

(A) is not correct but (R) is correct

D

(A) is correct but (R) is not correct

Question 34: Palette 34/178

JEE Mains 2024 MCQ

In the following sequence of reaction, the major products B and C respectively are :

A

B

C

D

Question 35: Palette 35/178

JEE Mains 2024 MCQ

Which among the following compounds will undergo fastest S_N2 reaction.

A

B

C

D

Question 36: Palette 36/178

JEE Mains 2024 MCQ

Identify the major product in the following reaction.

A

B

C

D

Question 37: Palette 37/178

JEE Mains 2024 MCQ

Product P is

A

B

C

D

Question 38: Palette 38/178

JEE Mains 2024 MCQ

$\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{Br}+\mathrm{NaOH} \xrightarrow{\mathrm{C}_2 \mathrm{H}_5 \mathrm{OH}} \text { Product 'A' }$

Consider the above reactions, identify product B and product C.

A

$\mathrm{B}=\mathrm{C}=1$-Propanol

B

$\mathrm{B}=1$-Propanol $\mathrm{C}=2$-Propanol

C

$\mathrm{B}=\mathrm{C}=2$-Propanol

D

$\mathrm{B}=2$-Propanol $\mathrm{C}=1$-Propanol

Question 39: Palette 39/178

JEE Mains 2024 MCQ

Find out the major product formed from the following reaction. $[\mathrm{Me}:-\mathrm{CH}_3]$

A

B

C

D

Question 40: Palette 40/178

JEE Mains 2024 MCQ

Identify B and C and how are A and C related?

A

B

C

D

Question 41: Palette 41/178

JEE Mains 2024 MCQ

Identify the correct set of reagents or reaction conditions '$X$' and '$Y$' in the following set of transformation.

A

$\mathrm{X}=$ dil.aq. $\mathrm{NaOH}, 20^{\circ} \mathrm{C}, \quad \mathrm{Y}=\mathrm{HBr} /$ acetic acid

B

$\mathrm{X}=$ conc.alc. $\mathrm{NaOH}, 80^{\circ} \mathrm{C}, \mathrm{Y}=\mathrm{Br}_2 / \mathrm{CHCl}_3$

C

$\mathrm{X}=$ dil.aq. $\mathrm{NaOH}, 20^{\circ} \mathrm{C}, \quad \mathrm{Y}=\mathrm{Br}_2 / \mathrm{CHCl}_3$

D

$\mathrm{X}=$ conc.alc. $\mathrm{NaOH}, 80^{\circ} \mathrm{C}, \mathrm{Y}=\mathrm{HBr} /$ acetic acid

Question 42: Palette 42/178

JEE Mains 2024 MCQ

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

Assertion (A) : Haloalkanes react with KCN to form alkyl cyanides as a main product while with $\mathrm{AgCN}$ form isocyanide as the main product.

Reason (R) : $\mathrm{KCN}$ and $\mathrm{AgCN}$ both are highly ionic compounds.

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

A

(A) is correct but $(\mathbf{R})$ is not correct

B

Both (A) and (R) are correct and (R) is the correct explanation of (A)

C

(A) is not correct but (R) is correct

D

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

Question 43: Palette 43/178

JEE Mains 2024 MCQ

Identify A and B in the following reaction sequence.

A

B

C

D

Question 44: Palette 44/178

JEE Mains 2024 MCQ

The product (C) in the below mentioned reaction is :

$\mathrm{CH}_3-\mathrm{CH}_2-\mathrm{CH}_2-\mathrm{Br} \xrightarrow[\Delta]{\mathrm{KOH}_{(\text {alc) }}} \mathrm{A} \xrightarrow{\mathrm{HBr}} \mathrm{B} \xrightarrow[\mathrm{KOH}_{(\mathrm{aq})}]{\Delta} \mathrm{C}$

A

Propan-1-ol

B

Propyne

C

Propan-2-ol

D

Propene

Question 45: Palette 45/178

JEE Mains 2024 MCQ

Given below are two statements:

Statement - I: High concentration of strong nucleophilic reagent with secondary alkyl halides which do not have bulky substituents will follow $\mathrm{S}_{\mathrm{N}}{ }^2$ mechanism.

Statement - II: A secondary alkyl halide when treated with a large excess of ethanol follows $\mathrm{S}_{\mathrm{N}}{ }^1$ mechanism.

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

A

Both Statement I and Statement II are true.

B

Statement I is true but Statement II is false.

C

Both Statement I and Statement II are false.

D

Statement I is false but Statement II is true.

Question 46: Palette 46/178

JEE Mains 2024 MCQ

Example of vinylic halide is :

A

B

C

D

Question 47: Palette 47/178

JEE Mains 2024 MCQ

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

A

B

C

D

Question 48: Palette 48/178

JEE Mains 2024 MCQ

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

Assertion (A) : $\mathrm{CH}_2=\mathrm{CH}-\mathrm{CH}_2-\mathrm{Cl}$ is an example of allyl halide.

Reason (R) : Allyl halides are the compounds in which the halogen atom is attached to $\mathrm{sp}^2$ hybridised carbon atom.

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

A

(A) is true but (R) is false

B

(A) is false but (R) is true

C

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

D

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

Question 49: Palette 49/178

JEE Mains 2024 MCQ

Alkyl halide is converted into alkyl isocyanide by reaction with

A

$\mathrm{KCN}$

B

$\mathrm{NH}_4 \mathrm{CN}$

C

$\mathrm{NaCN}$

D

$\mathrm{AgCN}$

Question 50: Palette 50/178

JEE Mains 2024 MCQ

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

Assertion A : Aryl halides cannot be prepared by replacement of hydroxyl group of phenol by halogen atom.

Reason R : Phenols react with halogen acids violently.

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

A

A is true but R is false

B

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

C

A is false but R is true

D

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

Question 51: Palette 51/178

JEE Mains 2024 MCQ

Identify B formed in the reaction.

$\mathrm{Cl}-\left(\mathrm{CH}_2\right)_4-\mathrm{Cl} \xrightarrow{\text { excess } \mathrm{NH}_3} \mathrm{~A} \xrightarrow{\mathrm{NaOH}} \mathrm{B}+\mathrm{H}_2 \mathrm{O}+\mathrm{NaCl}$

A

B

C

$\stackrel{-}{\mathrm{Cl}}\stackrel{+}{\mathrm{N}} \mathrm{H}_3-\left(\mathrm{CH}_2\right)_4-\stackrel{+}{\mathrm{N}} \mathrm{H}_3 \mathrm{Cl}^{-}$

D

$\mathrm{H}_2 \mathrm{N}-\left(\mathrm{CH}_2\right)_4-\mathrm{NH}_2$

Question 52: Palette 52/178

JEE Mains 2024 MCQ

Which among the following halide/s will not show $\mathrm{S_N 1}$ reaction:

(A) $\mathrm{H}_2 \mathrm{C}=\mathrm{CH}-\mathrm{CH}_2 \mathrm{Cl}$

(B) $\mathrm{CH}_3-\mathrm{CH}=\mathrm{CH}-\mathrm{Cl}$

(C)

(D)

Choose the most appropriate answer from the options given below :

A

(B) and (C) only

B

(A), (B) and (D) only

C

(B) only

D

(A) and (B) only

Question 53: Palette 53/178

JEE Mains 2024 MCQ

The correct statement regarding nucleophilic substitution reaction in a chiral alkyl halide is ;

A

Retention occurs in $S_N 1$ reaction and inversion occurs in $\mathrm{S}_{\mathrm{N}} 2$ reaction.

B

Racemisation occurs in $\mathrm{S}_{\mathrm{N}} 1$ reaction and retention occurs in $\mathrm{S}_{\mathrm{N}} 2$ reaction.

C

Racemisation occurs in both $\mathrm{S}_{\mathrm{N}} 1$ and $\mathrm{S}_{\mathrm{N}} 2$ reactions.

D

Racemisation occurs in $S_N 1$ reaction and inversion occurs in $\mathrm{S}_{\mathrm{N}} 2$ reaction.

Question 54: Palette 54/178

JEE Mains 2023 MCQ

The major product formed in the Friedel-Craft acylation of chlorobenzene is

A

B

C

D

Question 55: Palette 55/178

JEE Mains 2023 MCQ

In the following reaction 'X' is

A

$\mathrm{CH}_{3}\left(\mathrm{CH}_{2}\right)_{4} \mathrm{CH}_{2} \mathrm{Cl}$

B

C

$\mathrm{Cl}-\mathrm{CH}_{2}-\left(\mathrm{CH}_{2}\right)_{4}-\mathrm{CH}_{2}-\mathrm{Cl}$

D

Question 56: Palette 56/178

JEE Mains 2023 MCQ

Compound from the following that will not produce precipitate on reaction with $\mathrm{AgNO}_{3}$ is :

A

B

C

D

Question 57: Palette 57/178

JEE Mains 2023 MCQ

Find out the correct statement from the options given below for the above 2 reactions.

A

Reaction (I) is of $1^{\text {st }}$ order and reaction (II) is of $2^{\text {nd }}$ order

B

Reaction (I) is of $2^{\text {nd }}$ order and reaction (II) is of $1^{\text {st }}$ order

C

Reactions (I) and (II) both are of $2^{\text {nd }}$ order

D

Reactions (I) and (II) both are of $1^{\text {st }}$ order

Question 58: Palette 58/178

JEE Mains 2023 MCQ

Identify the correct order of reactivity for the following pairs towards the respective mechanism

Choose the correct answer from the options given below:

A

(A), (B) and (D) only

B

(A), (B), (C) and (D)

C

(B), (C) and (D) only

D

(A), (C) and (D) only

Question 59: Palette 59/178

JEE Mains 2023 MCQ

The pair from the following pairs having both compounds with net non-zero dipole moment is

A

cis-butene, trans-butene

B

CH$_2$Cl$_2$, CHCl$_3$

C

Benzene, anisidine

D

1,4-Dichlorobenzene, 1,3-Dichlorobenzene

Question 60: Palette 60/178

JEE Mains 2023 MCQ

Major product '$\mathrm{P}$' formed in the following reaction is:

A

B

C

D

Question 61: Palette 61/178

JEE Mains 2023 MCQ

The correct order of reactivity of following haloarenes towards nucleophilic substitution with aqueous $\mathrm{NaOH}$ is :

Choose the correct answer from the options given below:

A

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

B

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

C

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

D

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

Question 62: Palette 62/178

JEE Mains 2023 MCQ

Choose the halogen which is most reactive towards $\mathrm{S}_{\mathrm{N}} 1$ reaction in the given compounds (A, B, C & D)

A

$\mathrm{A}-\mathrm{Br}_{(\mathrm{b})} ; \mathrm{B}-\mathrm{I}_{(\mathrm{a})} ; \mathrm{C}-\mathrm{Br}_{(\mathrm{a})} ; \mathrm{D}-\mathrm{Br}_{(\mathrm{a})}$

B

$\mathrm{A}-\mathrm{Br}_{(\mathrm{a})} ; \mathrm{B}-\mathrm{I}_{(\mathrm{a})} ; \mathrm{C}-\mathrm{Br}_{(\mathrm{a})} ; \mathrm{D}-\mathrm{Br}_{(\mathrm{a})}$

C

$\mathrm{A}-\mathrm{Br}_{(b)} ; \mathrm{B}-\mathrm{I}_{(b)} ; \mathrm{C}-\mathrm{Br}_{(b)} ; \mathrm{D}-\mathrm{Br}_{(\mathrm{b})}$

D

$\mathrm{A}-\mathrm{Br}_{(\mathrm{a})} ; \mathrm{B}-\mathrm{I}_{(\mathrm{a})} ; \mathrm{C}-\mathrm{Br}_{(b)} ; \mathrm{D}-\mathrm{Br}_{(\mathrm{a})}$

Question 63: Palette 63/178

JEE Mains 2023 MCQ

For the reaction

The correct statement is

A

The solvent used in the reaction solvates the ions formed in rate determining step.

B

Br$^-$ can act as competing nucleophile.

C

The reaction can occur in acetic acid also.

D

The transition state formed in the above reaction is less polar than the localised anion.

Question 64: Palette 64/178

JEE Mains 2023 MCQ

In the following halogenated organic compounds, the one with the maximum number of chlorine atoms in its structure is :

A

Gammaxene

B

Chloropicrin

C

Chloral

D

Freon-12

Question 65: Palette 65/178

JEE Mains 2023 MCQ

The correct order of melting points of dichlorobenzenes is

A

B

C

D

Question 66: Palette 66/178

JEE Mains 2023 MCQ

Decreasing order towards SN 1 reaction for the following compounds is:

A

$a>c>d>b$

B

$\mathrm{d}>\mathrm{b}>\mathrm{c}>\mathrm{a}$

C

$a>b>c>d$

D

$\mathrm{b}>\mathrm{d}>\mathrm{c}>\mathrm{a}$

Question 67: Palette 67/178

JEE Mains 2023 MCQ

Match List I with List II

	List I		List II
A.		I.	Fittig reaction
B.		II.	Wurtz Fittig reaction
C.		III.	Finkelstein reaction
D.	$\mathrm{C_5H_5C1+NaI\to C_2H_5I+NaCl}$	IV.	Sandemyer reaction

Choose the correct answer from the options given below :

A

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

B

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

C

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

D

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

Question 68: Palette 68/178

JEE Mains 2023 MCQ

Identify the correct order for the given property for following compounds.

Choose the correct answer from the option given below :

A

(A), (B) and (E) only

B

(A), (C) and (D) only

C

(A), (C) and (E) only

D

(B), (C) and (D) only

Question 69: Palette 69/178

JEE Mains 2023 MCQ

The isomeric deuterated bromide with molecular formula $\mathrm{C_4H_8DBr}$ having two chiral carbon atoms is

A

2 - Bromo - 1 - deuterobutane

B

2 - Bromo - 1 - deutero - 2 - methylpropane

C

2 - Bromo - 3 - deuterobutane

D

2 - Bromo - 2 - deuterobutane

Question 70: Palette 70/178

JEE Mains 2023 MCQ

The compound which will have the lowest rate towards nucleophilic aromatic substitution on treatment with OH$^-$ is

A

B

C

D

Question 71: Palette 71/178

JEE Mains 2023 MCQ

Assertion A : Hydrolysis of an alkyl chloride is a slow reaction but in the presence of NaI, the rate of the hydrolysis increases.

Reason R : I$^{-}$ is a good nucleophile as well as a good leaving group.

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

A

A is true but R is false

B

A is false but R is true

C

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

D

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

Question 72: Palette 72/178

JEE Mains 2022 MCQ

Compound 'A' undergoes following sequence of reactions to give compound 'B'.

The correct structure and chirality of compound 'B' is

[where Et is $\left.-\mathrm{C}_{2} \mathrm{H}_{5}\right]$

A

B

C

D

Question 73: Palette 73/178

JEE Mains 2022 MCQ

Which among the following pairs of the structures will give different products on ozonolysis? (Consider the double bonds in the structures are rigid and not delocalized.)

A

B

C

D

Question 74: Palette 74/178

JEE Mains 2022 MCQ

Considering the above reactions, the compound 'A' and compound 'B' respectively are :

A

B

C

D

Question 75: Palette 75/178

JEE Mains 2022 MCQ

The major product in the given reaction is

A

B

C

D

Question 76: Palette 76/178

JEE Mains 2022 MCQ

Major product '$\mathrm{B}$' of the following reaction sequence is :

A

B

C

D

Question 77: Palette 77/178

JEE Mains 2022 MCQ

The stable carbocation formed in the above reaction is

A

$C{H_3}C{H_2}\mathop C\limits^ \oplus {H_2}$

B

$C{H_3}\mathop C\limits^ \oplus {H_2}$

C

$C{H_3} - \mathop C\limits^ \oplus H - C{H_3}$

D

Question 78: Palette 78/178

JEE Mains 2022 MCQ

Two isomers (A) and (B) with Molar mass 184 g/mol and elemental composition C, 52.2%; H, 4.9% and Br 42.9% gave benzoic acid and p-bromobenzoic acid, respectively on oxidation with KMnO₄. Isomer 'A' is optically active and gives a pale yellow precipitate when warmed with alcoholic AgNO₃. Isomer 'A' and 'B' are, respectively

A

B

C

D

Question 79: Palette 79/178

JEE Mains 2022 MCQ

In the given conversion the compound A is :

A

B

C

D

Question 80: Palette 80/178

JEE Mains 2022 MCQ

In the above reaction 'A' is

A

B

C

D

Question 81: Palette 81/178

JEE Mains 2022 MCQ

The major product (P) in the reaction

is

A

B

C

D

Question 82: Palette 82/178

JEE Mains 2022 MCQ

Which one of the following compounds is inactive towards S_N1 reaction?

A

B

C

D

Question 83: Palette 83/178

JEE Mains 2022 MCQ

The major product of the following reaction is :

A

B

C

D

Question 84: Palette 84/178

JEE Mains 2022 MCQ

Halogenation of which one of the following will yield m-substituted product with respect to methyl group as a major product?

A

B

C

D

Question 85: Palette 85/178

JEE Mains 2022 MCQ

The major product in the reaction

A

t-Butyl ethyl ether

B

2,2-Dimethyl butane

C

2-Methyl pent-1-ene

D

2-Methyl prop-1-ene

Question 86: Palette 86/178

JEE Mains 2022 MCQ

In the given reaction sequence, the major product 'C' is :

A

B

C

D

Question 87: Palette 87/178

JEE Mains 2021 MCQ

In the following sequence of reactions,


The compounds B and C respectively are :-

A

CI₃COOK, HCOOH

B

CI₃COOK, CH₃I

C

CH₃I, HCOOK

D

CHI₃, CH₃COOK

Question 88: Palette 88/178

JEE Mains 2021 MCQ

The major product of the following reaction is :

A

B

C

D

Question 89: Palette 89/178

JEE Mains 2021 MCQ

The correct order of reactivity of the given chlorides with acetate in acetic acid is :

A

B

C

D

Question 90: Palette 90/178

JEE Mains 2021 MCQ

The major product (A) formed in the reaction given below is :

A

B

C

D

Question 91: Palette 91/178

JEE Mains 2021 MCQ

In the following sequence of reactions the P is :

A

B

C

D

Question 92: Palette 92/178

JEE Mains 2021 MCQ

Consider the given reaction, the product A is :

A

B

C

D

Question 93: Palette 93/178

JEE Mains 2021 MCQ

The major product formed in the following reaction is :

A

B

C

D

Question 94: Palette 94/178

JEE Mains 2021 MCQ

Among the following compounds I-IV, which one forms a yellow precipitate on reacting sequentially with (i) NaOH (ii) dil. HNO₃ (iii) AgNO₃?

A

II

B

IV

C

I

D

III

Question 95: Palette 95/178

JEE Mains 2021 MCQ

Excess of isobutane on reaction with Br₂ in presence of light at 125$^\circ$C gives which one of the following, as the major product?

A

B

C

D

Question 96: Palette 96/178

JEE Mains 2021 MCQ

The given reaction can occur in the presence of :

(a) Bromine water

(b) Br₂ in CS₂, 273 K

(c) Br₂/FeBr₃

(d) Br₂ in CHCl₃, 273 K

Choose the correct answer from the options gien below :

A

(b) and (d) only

B

(a) and (c) only

C

(b), (c) and (d) only

D

(a), (b) and (d) only

Question 97: Palette 97/178

JEE Mains 2021 MCQ

Given below are two statements :

Statement I : C₂H₅OH and AgCN both can generate nucleophile.

Statement II : KCN and AgCN both will generate nitrile nucleophile with all reaction conditions.

Choose the most appropriate option :

A

Statement I is false but statement II is true.

B

Both statement I and statement II are true.

C

Both statement I and statement II are false.

D

Statement I is true but statement II is false.

Question 98: Palette 98/178

JEE Mains 2021 MCQ

Main products formed during a reaction of 1-methoxy naphthalene with hydroiodic acid are :

A

B

C

D

Question 99: Palette 99/178

JEE Mains 2021 MCQ

Reaction of Grignard reagent, C₂H₅MgBr with C₈H₈O followed by hydrolysis gives compound "A" which reacts instantly with Lucas reagent to give compound B, C₁₀H₁₃Cl. The Compound B is :

A

B

C

D

Question 100: Palette 100/178

JEE Mains 2021 MCQ

The correct pair(s) of the ambident nucleophiles is(are)

(A) AgCN/KCN

(B) RCOOAg/RCOOK

(C) AgNO₂/KNO₂

(D) AgI/KI

A

(B) and (C) only

B

(B) only

C

(A) and (C) only

D

(A) only

Question 101: Palette 101/178

JEE Mains 2021 MCQ

The above reaction requires which of the following reaction conditions?

A

623 K, Cu, 300 atm

B

623 K, 300 atm

C

573 K, 300 atm

D

573 K, Cu, 300 atm

Question 102: Palette 102/178

JEE Mains 2021 MCQ

Product ''A'' in the above chemical reaction is :

A

B

C

D

Question 103: Palette 103/178

JEE Mains 2021 MCQ

Which of the following reaction is an example of ammonolysis?

A

C₆H₅COCl + C₆H₅NH₂ $ \to $ C₆H₅CONHC₆H₅

B

C₆H₅CH₂CN $\buildrel {[H]} \over \longrightarrow $ C₆H₅CH₂CH₂NH₂

C

C₆H₅CH₂CN $\buildrel {HCl} \over \longrightarrow $ C₆H₅$\mathop N\limits^ + $H₃Cl^$-$

D

C₆H₅CH₂Cl + NH₃ $ \to $ C₆H₅CH₂NH₂

Question 104: Palette 104/178

JEE Mains 2021 MCQ

Identify the reagent(s) 'A' and condition(s) for the reaction

A

A = HCl, ZnCl₂

B

A = HCl; Anhydrous AlCl₃

C

A = Cl₂; UV light

D

A = Cl₂; dark, Anhydrous AlCl₃

Question 105: Palette 105/178

JEE Mains 2021 MCQ

The products ''A'' and ''B'' formed in above reactions are :

A

B

C

D

Question 106: Palette 106/178

JEE Mains 2021 MCQ

Match List - I with List - II.


Choose the correct answer from the options given below :

A

(a) $ \to $ (ii), (b) $ \to $ (iv), (c) $ \to $ (i), (d) $ \to $ (iii)

B

(a) $ \to $ (iii), (b) $ \to $ (iv), (c) $ \to $ (i), (d) $ \to $ (ii)

C

(a) $ \to $ (iii), (b) $ \to $ (i), (c) $ \to $ (iv), (d) $ \to $ (ii)

D

(a) $ \to $ (ii), (b) $ \to $ (i), (c) $ \to $ (iv), (d) $ \to $ (iii)

Question 107: Palette 107/178

JEE Mains 2021 MCQ

For the given reaction


What is 'A'?

A

B

C

D

Question 108: Palette 108/178

JEE Mains 2021 MCQ

For the given reaction :


What is 'A'?

A

B

C

D

CH₃CH₂CH₂NH₂

Question 109: Palette 109/178

JEE Mains 2021 MCQ

Identify A and B in the chemical reaction.

A

B

C

D

Question 110: Palette 110/178

JEE Mains 2021 MCQ

What is the major product formed by HI on reaction with

A

B

C

D

Question 111: Palette 111/178

JEE Mains 2021 MCQ

The product formed in the first step of the reaction of


with excess $\mathrm{Mg/Et_2O}$ ($\mathrm{Et=C_2H_5}$) is

A

B

C

D

Question 112: Palette 112/178

JEE Mains 2020 MCQ

The increasing order of the boiling points of the major products A, B and C of the following reactions will be :

A

A < C < B

B

C < A < B

C

B < C < A

D

A < B < C

Question 113: Palette 113/178

JEE Mains 2020 MCQ

The major product formed in the following reaction is :
CH₃CH = CHCH(CH₃)₂ $\buildrel {HBr} \over \longrightarrow $

A

Br(CH₂)₃CH(CH₃)₂

B

CH₃CH(Br)CH₂CH(CH₃)₂

C

CH₃CH₂CH(Br)CH(CH₃)₂

D

CH₃CH₂CH₂C(Br)(CH₃)₂

Question 114: Palette 114/178

JEE Mains 2020 MCQ

Among the following compounds, which one has the shortest C – Cl bond?

A

H₃C - Cl

B

C

D

Question 115: Palette 115/178

JEE Mains 2020 MCQ

Which of the following compounds will form the precipitate with aq. AgNO₃ solution most readily?

A

B

C

D

Question 116: Palette 116/178

JEE Mains 2020 MCQ

The decreasing order of reactivity of the following organic molecules towards AgNO₃ solution is :

A

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

B

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

C

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

D

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

Question 117: Palette 117/178

JEE Mains 2020 MCQ

The decreasing order of reactivity of the following compounds towards nucleophilic substitution (S_N2) is :

A

(IV) > (II) > (III) > (I)

B

(II) > (III) > (IV) > (I)

C

(II) > (III) > (I) > (IV)

D

(III) > (II) > (IV) > (I)

Question 118: Palette 118/178

JEE Mains 2020 MCQ

The major product in the following reaction is :

A

B

C

D

Question 119: Palette 119/178

JEE Mains 2020 MCQ

The mechanism of S_N1 reaction is given as :
A student writes general characteristics based on the given mechanism as :
(a) The reaction is favoured by weak nucleophiles.
(b) R⁺ would be easily formed if the substituents are bulky.
(c) The reaction is accompanied by racemization.
(d) The reaction is favoured by non-polar solvents.

A

(a) and (b)

B

(a), (b) and (c)

C

(a) and (c)

D

(b) and (d)

Question 120: Palette 120/178

JEE Mains 2020 MCQ

The major product obtained from E₂ - elimination of 3-bromo-2-fluoropentane is

A

B

C

D

Question 121: Palette 121/178

JEE Mains 2020 MCQ

Consider the reaction sequence given below:
Which of the following statements is true?

A

Changing the concentration of base will have no effect on reaction (1)

B

Changing the concentration of base will have no effect on reaction (2)

C

Changing the base from OH^- to ^-OR will have no effect on reaction (2)

D

Doubling the concentration of base will double the rate of both the reactions

Question 122: Palette 122/178

JEE Mains 2020 MCQ

Which of the following compunds will show retention in configuration on nucleophilic substitution by OH^– ion?

A

B

C

D

Question 123: Palette 123/178

JEE Mains 2020 MCQ

Which of the following reactions will not produce a racemic product?

A

B

C

D

Question 124: Palette 124/178

JEE Mains 2020 MCQ

Which of these will produce the highest yield in Friedel Crafts reaction?

A

B

C

D

Question 125: Palette 125/178

JEE Mains 2020 MCQ

The decreasing order of reactivity towards dehydrohalogenation (E₁) reaction of the following compounds is :

A

B $>$ D $>$ A $>$ C

B

D $>$ B $>$ C $>$ A

C

B $>$ A $>$ D $>$ C

D

B $>$ D $>$ C $>$ A

Question 126: Palette 126/178

JEE Mains 2020 MCQ

Consider the following reactions :
Which of these reactions are possible ?

A

(b), (c) and (d)

B

(a) and (b)

C

(a) and (d)

D

(b) and (d)

Question 127: Palette 127/178

JEE Mains 2020 MCQ

For the following reactions


K_s and K_e, are respectively, the rate constants for substitution and elimination and $\mu = {{{k_s}} \over {{k_e}}}$ the correct options is

A

${\mu _B} > {\mu _A}$ and K_e(A) > K_e(B)

B

${\mu _A} > {\mu _B}$ and K_e(B) > K_e(A)

C

${\mu _B} > {\mu _A}$ and K_e(B) > K_e(A)

D

${\mu _A} > {\mu _B}$ and K_e(A) > K_e(B)

Question 128: Palette 128/178

JEE Mains 2020 MCQ

1- methyl ethylene oxide when treated with an excess of HBr produces :

A

B

C

D

Question 129: Palette 129/178

JEE Mains 2019 MCQ

Which one of the following is likely to give a precipitate with AgNO₃ solution ?

A

CHCl₃

B

(CH₃)₃CCl

C

CCl₄

D

CH₂=CH–Cl

Question 130: Palette 130/178

JEE Mains 2019 MCQ

An 'Assertion' and a 'Reason' are given below. Choose the correct answer from the following options :
Assertion (A) : Vinyl halides do not undergo nucleophilic substitution easily.
Reason (R) : Even though the intermediate carbocation is stabilized by loosely held p-electrons, the cleavage is difficult because of strong bonding.

A

Both (A) and (R) are correct statements but (R) is not the correct explanation of (A)

B

Both (A) and (R) are correct statements and (R) is the correct explanation of (A)

C

(A) is correct statement but (R) is a wrong statement

D

Both (A) and (R) are wrong statements.

Question 131: Palette 131/178

JEE Mains 2019 MCQ

Heating of 2-chloro-1-phenylbutane with EtOK/EtOH gives X as the major product. Reaction of X with Hg(OAc)₂/H₂O followed by NaBH₄ gives Y as the major product. Y is :

A

B

C

D

Question 132: Palette 132/178

JEE Mains 2019 MCQ

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

A

B

C

D

Question 133: Palette 133/178

JEE Mains 2019 MCQ

The major product obtained in the given reaction is :

A

B

C

D

Question 134: Palette 134/178

JEE Mains 2019 MCQ

Increasing rate of S_N1 reaction in the following compounds is :

A

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

B

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

C

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

D

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

Question 135: Palette 135/178

JEE Mains 2019 MCQ

The major product of the following reaction is :

A

B

C

D

Question 136: Palette 136/178

JEE Mains 2019 MCQ

Which one of the following alkenes when treated with HCl yields majorly an anti Markovnikov product?

A

Cl – CH = CH₂

B

F₃C – CH = CH₂

C

CH₃O – CH = CH₂

D

H₂N – CH = CH₂

Question 137: Palette 137/178

JEE Mains 2019 MCQ

The major product in the following reaction is :

A

B

C

D

Question 138: Palette 138/178

JEE Mains 2019 MCQ

The major product of the following reaction is:

A

B

C

D

Question 139: Palette 139/178

JEE Mains 2019 MCQ

The major product in the following conversion is –

A

B

C

D

Question 140: Palette 140/178

JEE Mains 2019 MCQ

Which of the following compounds will produce a precipitate with AgNO₃ ?

A

B

C

D

Question 141: Palette 141/178

JEE Mains 2019 MCQ

Which hydrogen in compound (E) is easily replaceable during bromination reaction in presence of light ?

A

$\beta $ $-$ hydrogen

B

$\alpha $ $-$ hydrogen

C

$\gamma $ $-$ hydrogen

D

$\delta $ $-$ hydrogen

Question 142: Palette 142/178

JEE Mains 2019 MCQ

The major product of the following reaction is :

A

B

C

D

Question 143: Palette 143/178

JEE Mains 2019 MCQ

The compounds A and B in the following reaction are, respectively :

A

A = Benzyl alcohol, B = Benzyl cyanide

B

A = Benzyl chloride, B = Benzyl cyanide

C

A = Benzyl alcohol, B = Benzyl isocyanide

D

A = Benzyl chloride, B = Benzyl isocyanide

Question 144: Palette 144/178

JEE Mains 2019 MCQ

The major product of the following reaction is :

A

B

C

D

Question 145: Palette 145/178

JEE Mains 2018 MCQ

The most polar compound among the following is :

A

B

C

D

Question 146: Palette 146/178

JEE Mains 2018 MCQ

The major product of the following reaction is :

A

B

C

D

Question 147: Palette 147/178

JEE Mains 2018 MCQ

The major product of the following reaction is:

A

B

C

D

Question 148: Palette 148/178

JEE Mains 2017 MCQ

In the following reaction sequence :



The compound I is :

A

B

C

D

Question 149: Palette 149/178

JEE Mains 2017 MCQ

The major product of the following reaction is :

A

CH₂ = CHCH₂CH = CHCH₃

B

CH₂ = CHCH = CHCH₂CH₃

C

CH₃CH = C = CHCH₂CH₃

D

CH₃CH = CH − CH = CHCH₃

Question 150: Palette 150/178

JEE Mains 2017 MCQ

The major product of the following reaction is :

A

B

C

D

Question 151: Palette 151/178

JEE Mains 2017 MCQ

Which of the following compounds will not undergo Friedel Craft’s reaction with benzene ?

A

B

C

D

Question 152: Palette 152/178

JEE Mains 2017 MCQ

Which of the following, upon treatment with tert-BuONa followed by addition of bromine water, fails to decolorize the colour of bromine?

A

B

C

D

Question 153: Palette 153/178

JEE Mains 2017 MCQ

3-Methyl-pent-2-ene on reaction with HBr in presence of peroxide forms an addition product. The number of possible stereoisomers for the product is :

A

Zero

B

Two

C

Four

D

Six

Question 154: Palette 154/178

JEE Mains 2017 MCQ

The increasing order of the reactivity of the following halides for the S_N1 reaction is :

A

(II) < (I) < (III)

B

(I) < (III) < (II)

C

(II) < (III) < (I)

D

(III) < (II) < (I)

Question 155: Palette 155/178

JEE Mains 2017 MCQ

The major product obtained in the following reaction is :

A

C₆H₅CH = CHC₆H₅

B

(+) - C₆H₅CH(Ot-Bu)CH₂C₆H₅

C

(-) - C₆H₅CH(Ot-Bu)CH₂C₆H₅

D

($ \pm $) - C₆H₅CH(Ot-Bu)CH₂C₆H₅

Question 156: Palette 156/178

JEE Mains 2016 MCQ

Bromination of cyclohexene under conditions given below yields :

A

B

C

D

Question 157: Palette 157/178

JEE Mains 2016 MCQ

Which one of the following reagents is not suitable for the elimination reaction ?

A

NaOH/H₂O

B

NaOEt/EtOH

C

NaOH/H₂O-EtOH

D

NaI

Question 158: Palette 158/178

JEE Mains 2015 MCQ

The synthesis of alkyl fluorides is best accomplished by:

A

Sandmeyer’s reaction

B

Finkelstein reaction

C

Swarts reaction

D

Free radical fluorination

Question 159: Palette 159/178

JEE Mains 2014 MCQ

In S_N2 reactions, the correct order of reactivity for the following compounds:
CH₃Cl, CH₃CH ₂Cl, (CH₃)₂CHCl and (CH₃)₃CCl is:

A

CH₃CH₂Cl > CH₃Cl > (CH₃)₂CHCl > (CH₃)₃CCl

B

(CH₃)₂CHCl > CH₃CH₂Cl > CH₃Cl > (CH₃)₃CCl

C

CH₃Cl > (CH₃)₂CHCl > CH₃CH₂Cl > (CH₃)₃CCl

D

CH3Cl > CH₃CH₂Cl > (CH₃)₂CHCl > (CH₃)₃CCl

Question 160: Palette 160/178

JEE Mains 2014 MCQ

The major organic compound formed by the reaction of 1, 1, 1– trichloroethane with silver powder is:

A

2- Butyne

B

2- Butene

C

Acetylene

D

Ethene

Question 161: Palette 161/178

JEE Mains 2013 MCQ

A solution of (–$l$) – chloro –1 – phenylethane in toluene racemises slowly in the presence of a small amount of SbCl₅, due to the formation of :

A

carbene

B

carbocation

C

free radical

D

carbanion

Question 162: Palette 162/178

JEE Mains 2013 MCQ

Compound $\left( A \right),\,{C_8}{H_9}Br,\,\,\,$ gives a white precipitate when warmed with alcoholic $AgN{O_3}.$ Oxidation of $(A)$ gives an acid $\left( B \right),$ ${C_8}{H_6}{O_4}.\,\,\left( B \right)$ easily forms anhydride on heating. Identify the compound $(A).$

A

B

C

D

Question 163: Palette 163/178

JEE Mains 2012 MCQ

What is DDT among the following?

A

Greenhouse gas

B

A fertilizer

C

Biodegradable pollutant

D

Non–biodegradable pollutant

Question 164: Palette 164/178

JEE Mains 2012 MCQ

Iodoform can be prepared from all except :

A

Ethyl methyl ketone

B

Isopropyl alcohol

C

3–Methyl – 2– butanone

D

Isobutyl alcohol

Question 165: Palette 165/178

JEE Mains 2012 MCQ

How many chiral compounds are possible on monochlorination of 2–methyl butane ?

A

8

B

2

C

4

D

6

Question 166: Palette 166/178

JEE Mains 2010 MCQ

Consider the following bromides :



The correct order of ${S_N}1$ reactive is

A

$B > C > A$

B

$B > A > C$

C

$C > B > A$

D

$A > B > C$

Question 167: Palette 167/178

JEE Mains 2009 MCQ

Which of the following on heating with aqueous KOH, produces acetaldehyde ?

A

CH₃COCl

B

CH₃CH₂Cl

C

CH₂ClCH₂Cl

D

CH₃CHCl₂

Question 168: Palette 168/178

JEE Mains 2008 MCQ

The organic chloro compound, which shows complete stereochemical inversion during a S_N2 reaction, is

A

(C₂H₅)₂CHC

B

(CH₃)₃CCl

C

(CH₃)₂CHCl

D

CH₃Cl

Question 169: Palette 169/178

JEE Mains 2007 MCQ

Which of the following is the correct order of decreasing S_N2 reactivity?

A

RCH₂X > R₃CX > R₂CHX

B

RCH₂X > R₂CHX > R₃CX

C

R₃CX > R₂CHX > RCH₂X

D

R₂CHX > R₃CX > RCH₂X

Question 170: Palette 170/178

JEE Mains 2006 MCQ

The structure of the major product formed in the following reaction


is

A

B

C

D

Question 171: Palette 171/178

JEE Mains 2006 MCQ

Fluorobenzene (C₆H₅F) can be synthesized in the laboratory

A

by heating phenol with HF and KF

B

from aniline by diazotisation followed by heating the diazonium salt with HBF₄

C

by direct fluorination of benzene with F₂ gas

D

by reacting bromobenzene with NaF solution

Question 172: Palette 172/178

JEE Mains 2006 MCQ

Reaction of trans-2-phenyl-1-bromocyclopentane on reaction with alcoholic KOH produces

A

4-phenylcyclopentene

B

2-phenylcyclopentene

C

1-phenylcyclopentene

D

3-phenylcyclopentene

Question 173: Palette 173/178

JEE Mains 2005 MCQ

Alkyl halides react with dialkyl copper reagents to give

A

alkenes

B

alkyl copper halides

C

alkanes

D

alkenyl halides

Question 174: Palette 174/178

JEE Mains 2005 MCQ

Elimination of bromine from 2-bromobutane results in the formation of-

A

equimolar mixture of 1 and 2-butene

B

predominantly 2-butene

C

predominantly 1-butene

D

predominantly 2-butyne

Question 175: Palette 175/178

JEE Mains 2005 MCQ

Tertiary alkyl halides are practically inert to substitution by S_N2 mechanism because of

A

insolubility

B

instability

C

inductive effect

D

steric hindrance

Question 176: Palette 176/178

JEE Mains 2004 MCQ

The compound formed on heating chlorobenzene with chloral in the presence concentrated sulphuric acid is

A

gammexene

B

hexachloroethane

C

Freon

D

DDT

Question 177: Palette 177/178

JEE Mains 2003 MCQ

Bottles containing C₆H₅l and C₆H₅CH₂I lost their original labels. They were labelled A and B for testing A and B were separately taken in test tubes and boiled with NaOH solution. The end solution in each tube was made acidic with dilute HNO₃ and then some AgNO₃ solution was added. Substance B gave a yellow precipitate. Which one of the following statements is true for this experiment?

A

A and C₆H₅CH₂I

B

B and C₆H₅I

C

Addition of HNO₃ was unnecessary

D

A was C₆H₅I

Question 178: Palette 178/178

JEE Mains 2002 MCQ

The reaction :
${(CH)_3}C - Br\buildrel {{H_2}O} \over \longrightarrow {(CH)_3}C - OH$

A

elimination reaction

B

substitution reaction

C

free radical reaction

D

displacement reaction