Haloalkanes & Haloarenes

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JEE Advanced 2025

LEVELJEE Main

For the reaction sequence given below, the correct statement(s) is(are) (In the options, X is any atom other than carbon and hydrogen, and it is different in P, Q and R)

* Multiple Correct Options

(A)

C–X bond length in P, Q and R follows the order Q > R > P.

(B)

C–X bond enthalpy in P, Q and R follows the order R > P > Q.

(C)

Relative reactivity toward S_N2 reaction in P, Q and R follows the order P > R > Q.

(D)

pK_a value of the conjugate acids of the leaving groups in P, Q and R follows the order R > Q > P.

JEE Advanced 2022

LEVELJEE Advanced

Consider the following reaction. On estimation of bromine in $1.00 g$ of $R$ using Carius method, the amount of $AgBr$ formed (in $g$ ) is ______. [Given : Atomic mass of $H = 1$ , $C = 12$ , $O = 16$ , $P = 31$ , $Br = 80$ , $Ag = 108$ ]

JEE Advanced 2023

LEVELJEE Advanced

Match the reactions in List-I with the features of their products in List-II and choose the correct option.

List-I

(P)

(-)-1-Bromo-2-ethylpentane (single enantiomer)

aq. NaOH S_{N} 2 reaction

(Q)

(-)-2-Bromopentane (single enantiomer)

aq. NaOH S_{N} 2 reaction

(R)

(-)-3-Bromo-3-methylhexane (single enantiomer)

aq. NaOH S_{N} 1 reaction

(S)

(Single enantiomer)

aq. NaOH S_{N} 1 reaction

List-II

(1)

Inversion of configuration

(2)

Retention of configuration

(3)

Mixture of enantiomers

(4)

Mixture of structural isomers

(5)

Mixture of diastereomers

JEE Advanced 2018

LEVELJEE Main

In the following reaction sequence, the correct structure(s) of X is (are)

Compound(s) that on hydrogenation produce(s) optically inactive compound(s) is (are) –

* Multiple Correct Options

For the following compounds, the correct statement(s) with respect of nucleophilic substitution reactions is(are):

* Multiple Correct Options

(A)

I and II follow S_N2 mechanism

(B)

The order of reactivity for I, III and IV is : IV > I > III

(C)

I and III follow S_N1 mechanism

(D)

Compound IV undergoes inversion of configuration

JEE Advanced 2016

LEVELJEE Advanced

In the following monobromination reaction, the number of possible chiral products is

JEE Main 2021

LEVELJEE Advanced

Increasing order of reactivity of the following compounds for $S_{N} 1$ substitution is

(A)

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

(B)

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

(C)

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

(D)

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

JEE Main 2020

LEVELJEE Main

Which of the following compounds will show retention in configuration on nucleophilic substitution by $O H^{-}$ ion?

(A)

C H_{3} - C H (C_{6} H_{5}) - B r

(B)

C H_{3} - C H (C_{2} H_{5}) - C H_{2} B r

(C)

C H_{3} - C H (C H_{3}) - B r

(D)

C H_{3} - C H (C_{6} H_{13}) - B r

JEE Main 2021

LEVELJEE Main

The above reaction requires which of the following reaction conditions?

For the given reaction, What is A?

The major product of the following reaction is

The major product in the following conversion is

(A)

CH3O-C6H4-CH(Br)-CH2-CH3

(B)

HO-C6H4-CH2-CH(Br)-CH3

(C)

CH3O-C6H4-CH2-CH(Br)-CH3

(D)

HO-C6H4-CH(Br)-CH2-CH3

JEE Main 2021

LEVELJEE Advanced

Reaction of Grignard reagent, $C_{2} H_{5} MgBr$ with $C_{8} H_{8} O$ followed by hydrolysis gives compound 'A' which reacts instantly with Lucas reagent to give compound B, $C_{10} H_{13} Cl$ . The compound B is

The increasing order of reactivity of the following halides for the $S_{N} 1$ reaction is I. $C H_{3} C H (C l) C H_{2} C H_{3}$ II. $C H_{3} C H_{2} C H_{2} C l$ III. $p - H_{3} C O - C_{6} H_{4} - C H_{2} C l$

Consider the following reactions : (A) $(C H_{3})_{3} C C H (O H) C H_{3} Conc. H_{2} S O_{4}$ (B) $(C H_{3})_{2} C H C H (B r) C H_{3} Alc. KOH$ (C) $(C H_{3})_{2} C H C H (B r) C H_{3} (C H_{3})_{3} C O^{⊖} K^{\oplus}$ (D) $(C H_{3})_{2} C (O H) - C H_{2} - C H O Δ$ Which of these reaction(s) will not produce Saytzeff product?

Which hydrogen in compound (E) is easily replaceable during bromination reaction in presence of light? $C H_{3} - C H_{2} - C H = C H_{2}$ $δ γ β α$ (E)

(A)

β

-hydrogen

(B)

δ

-hydrogen

(C)

γ

-hydrogen

(D)

α

-hydrogen

JEE Main 2021

LEVELJEE Main

Product A is

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

Which one of the following is likely to give a precipitate with $A g N O_{3}$ solution?

(A)

C H_{2} == C H - C l

(B)

C C l_{4}

(C)

C H C l_{3}

(D)

(C H_{3})_{3} C C l

JEE Main 2019

LEVELJEE Main

The major product of the following reaction is

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

For the reaction sequence given below, the correct statement(s) is(are) (In the options, X is any atom other than carbon and hydrogen, and it is different in P, Q and R)

Match the reactions in List-I with the features of their products in List-II and choose the correct option.

List-I

List-II

In the following reaction sequence, the correct structure(s) of X is (are)

Compound(s) that on hydrogenation produce(s) optically inactive compound(s) is (are) –

For the following compounds, the correct statement(s) with respect of nucleophilic substitution reactions is(are):

In the following monobromination reaction, the number of possible chiral products is

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } The product A and B formed in above reactions are

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } The major product Y in the following reaction is

The synthesis of alkyl fluorides is best accomplished by

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } Increasing order of reactivity of the following compounds for SN​1 substitution is

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } Which of the following compounds will show retention in configuration on nucleophilic substitution by OH− ion?

The above reaction requires which of the following reaction conditions?

For the given reaction, What is A?

The major product of the following reaction is

The major product in the following conversion is

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } Which hydrogen in compound (E) is easily replaceable during bromination reaction in presence of light? CH3​−CH2​−CH=CH2​ δγβα (E)

Product A is

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

.math-text-wrapper .katex { font-size: 1.05em !important; } .math-text-wrapper .katex-display { margin: 1rem 0 !important; } Which one of the following is likely to give a precipitate with AgNO3​ solution?

The major product of the following reaction is

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

The product $A$ and $B$ formed in above reactions are

The major product $Y$ in the following reaction is

Increasing order of reactivity of the following compounds for $S_{N} 1$ substitution is

Which of the following compounds will show retention in configuration on nucleophilic substitution by $O H^{-}$ ion?

Which hydrogen in compound (E) is easily replaceable during bromination reaction in presence of light? $C H_{3} - C H_{2} - C H = C H_{2}$ $δ γ β α$ (E)

Which one of the following is likely to give a precipitate with $A g N O_{3}$ solution?