The order of Cl-O bond energy in ClO–,ClO2–, ClO3–, ClO4– is

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ClO– > ClO2–> ClO3- > ClO4–

ClO4– > ClO3– > ClO2– > ClO–

ClO4– > ClO2– > ClO3– > ClO–

ClO3– > ClO– > ClO2– > ClO4–

answer is B.

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Detailed Solution

Except in hypochlorite, all these anions are stabilised by resonance structures. Perchlorate ion has four canonical structures and is most stable.so bond order increases, then bond energy increases

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