JEE Main · 2021 · 27 Jul 2021 · Shift 2 · p-Block Elements

Number of

Cl = O

bonds in chlorous acid, chloric acid and perchloric acid respectively are:

(A)4,1 and 0
(B)1,1 and 3
(C)1,2 and 3✓ Correct
(D)3,1 and 1

Answer: (C)

Solution

In each chlorine oxyacid the hydrogen stays on one oxygen as a

Cl - O - H

linkage, and every extra oxygen is held as a terminal doubly bonded atom. Chlorous acid is

HO - Cl = O

and carries one such bond; chloric acid is

HO - Cl O_{2}

with two; perchloric acid is

HO - Cl O_{3}

with three. The numbers of

Cl = O

bonds are

1

2

and

3

JEE Main · 2021 · 27 Jul 2021 · Shift 2 · Single correct option

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