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Per NCERT Problem 7.5, among the chlorine oxoanions ClO⁻, ClO₂⁻, ClO₃⁻, ClO₄⁻, which one does NOT disproportionate?
AClO₃⁻
BClO₄⁻
CClO₂⁻
DClO⁻
Answer & Solution
Correct answer: B. ClO₄⁻
NCERT Problem 7.5: ClO₄⁻ has Cl in its maximum ox. state +7, so it cannot be oxidised further → no disproportionation.
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