JEE Main · 2024 · 09 Apr 2024 · Shift 1 · Haloalkanes and Haloarenes

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

(A)(see structures)
A
B
✓ Correct
(B)(see structures)
(C)(see structures)
(D)(see structures)
A
B

Answer: (A)

Solution

Wurtz (Na/Et₂O) couples the alkyl bromide to the symmetric dimer A; (i) Mg/Et₂O then (ii) D₂O replaces the halogen with D (product B); Swarts (CoF₂) replaces Cl with F (product C). Matching the deuterated and fluorinated products gives option (1).

JEE Main · 2024 · 09 Apr 2024 · Shift 1 · Single correct option

Practise more: all JEE Main PYQs on Haloalkanes and Haloarenes →

More JEE Main questions on Haloalkanes and Haloarenes

The correct order of reactivity of $CH_{3} Br$ in methanol with the following nucleophiles is $F^{-}, I^{-}, C_{2} H_{5} O^{-}$ and $C_{6} H_{5} O^{-}$
JEE Main 2026View solution →
The correct order of the rate of reaction of the following reactants with nucleophile by $S_{N} 1$ mechanism is :
(Given : Structure I and II are rigid)
JEE Main 2026View solution →
The correct order of reactivity of the following benzyl halides towards reaction with KCN is:
JEE Main 2026View solution →
The correct order of the rate of the reaction for the following reaction with respect to nucleophiles is:
$CH_{3} Br + Nu^{Θ} ⟶ CH_{3} Nu + Br^{Θ}$
JEE Main 2026View solution →
Given below are four compounds:
(a) n-propyl chloride
(b) iso-propyl chloride
(c) sec-butyl chloride
(d) neo-pentyl chloride

Percentage of carbon in the one which exhibits optical isomerism is:
JEE Main 2026View solution →
Consider the following reaction :

$(i) NaNH_{2} (ii) ↓ - Br Y$

The product Y formed is :
JEE Main 2026View solution →