JEE Main · 2026 · 21 Jan 2026 · Shift 2 · Haloalkanes and Haloarenes

WhatsApp Email

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:

(A)52✓ Correct
(B)56
(C)46
(D)40

Answer: (A)

Solution

Among the four chlorides only sec-butyl chloride, 2-chlorobutane, carries a carbon bonded to four different groups and so shows optical isomerism. Its formula is

C_{4} H_{9} Cl

of molar mass

48 + 9 + 35.5 = 92.5 g mo l^{- 1}

, of which carbon contributes

48

. The percentage of carbon is

\frac{48}{92.5} \times 100 \approx 52%

JEE Main · 2026 · 21 Jan 2026 · Shift 2 · 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 →
Consider the following reaction :

$(i) NaNH_{2} (ii) ↓ - Br Y$

The product Y formed is :
JEE Main 2026View solution →
The correct sequence of reagents for the above conversion of X to Y is :
JEE Main 2026View solution →