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Chemistry · Redox Reactions

JEE Main 2025 — 22 January, Evening Shift — Question 29

The species which does not undergo disproportionation reaction is :

  1. Option A:

    ClO2−\mathrm{ClO}_{2}^{-}

  2. Option B:

    ClO4−\mathrm{ClO}_{4}^{-}

    Correct
  3. Option C:

    ClO−\mathrm{ClO}^{-}

  4. Option D:

    ClO3−\mathrm{ClO}_{3}^{-}

Answer: B

Step-by-step solution

Oxidation states of chlorine, we have

ClO−→+1\mathrm{ClO^-} \rightarrow +1

ClO2−→+3\mathrm{ClO_2^-} \rightarrow +3

ClO3−→+5\mathrm{ClO_3^-} \rightarrow +5

ClO4−→+7\mathrm{ClO_4^-} \rightarrow +7

Disproportionation occurs for intermediate oxidation states.

Since +7+7 is the highest oxidation state of chlorine, ClO4−\mathrm{ClO_4^-} does not undergo disproportionation.

Hence, the correct option is B.

Answer key and solution verified before publishing.

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Exam
JEE Main 2025
Paper
22 January, Evening Shift
Subject
Chemistry
Chapter
Redox Reactions
Topic
Types of Redox Reactions & Balancing of Redox Reactions
The species which does not undergo disproportionation reaction is : | JEE Main 2025 PYQ with Solution · DhiX AI