Chemistry Chemical Bonding and Molecular Structure JEE Advanced Previous Years Question Single Correct MCQ
Published on: August 12, 2026

The set with correct order of acidity is:

A
HClO < HClO 2 < HClO 3 < HClO 4
B
HClO 4 < HClO 3 < HClO 2 < HclO
C
HClO < HClO 4 < HClO 3 < HClO 2
D
HClO 4 < HClO 2 < HClO 3 < HClO

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Text Solution

Verified by Experts
The correct answer is:
A

According to conjugate acid-base theory, that acid is more acidic whose conjugate base is more stable. The order of the stability of the conjugate bases of these acids is as follows:

ClO – < ClO 2 – < ClO 3 – < ClO 4 – on the basis of the charge dispersion on the oxygen atoms (more charge dispersion on oxygen atoms, more stable is the conjugate base). Also, for oxyacid’s of same element, as oxidation state of element increases, acidic strength of oxyacid’s increases.

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