MHT CET202616 April 2026Evening ShiftChemistryRedox ReactionsActual

What is oxidation state of chlorine in chlorous acid?

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Correct answer

C. +3

Step-by-step solution

The chemical formula of chlorous acid is HClO₂ . Let the oxidation state of chlorine be x . The oxidation state of hydrogen is +1 and that of oxygen is -2 . Since the molecule is neutral, the sum of the oxidation states of all atoms is zero. +1 + x + 2(-2) = 0 1 + x - 4 = 0 x - 3 = 0 x = +3 The oxidation state of chlorine in chlorous acid is +3 . Answer: +3

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