JEE Main · 2021 · Shift-IIhardPB12-102

Number of Cl=O bonds in chlorous acid, chloric acid and perchloric acid respectively are:

p-Block Elements (Class 12) · Class 12 · JEE Main Previous Year Question

Question

Number of Cl=O\mathrm{Cl=O} bonds in chlorous acid, chloric acid and perchloric acid respectively are:

Options
  1. a

    3, 1 and 1

  2. b

    4, 1 and 0

  3. c

    1, 1 and 3

  4. d

    1, 2 and 3

    ✓
Correct Answerd

1, 2 and 3

Detailed Solution

Strategy: Identify the structures of chlorine oxoacids and count the number of double bonds.

Step 1: Structural Analysis

  • Chlorous acid (\ceHClO2)(\ce{HClO2}): \ceH−O−Cl=O\ce{H-O-Cl=O} (Contains 1 \ceCl=O\ce{Cl=O} bond).
  • Chloric acid (\ceHClO3)(\ce{HClO3}): \ceH−O−Cl(=O)2\ce{H-O-Cl(=O)2} (Contains 2 \ceCl=O\ce{Cl=O} bonds).
  • Perchloric acid (\ceHClO4)(\ce{HClO4}): \ceH−O−Cl(=O)3\ce{H-O-Cl(=O)3} (Contains 3 \ceCl=O\ce{Cl=O} bonds).

Step 2: Selection The set of counts (1,2,3)(1, 2, 3) correctly maps to option d.

Answer: (Option) [d] 1, 2, 3\boxed{\text{Answer: (Option) [d] 1, 2, 3}}

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