Question

Assertion :The acidic strength of oxyacids of chlorine are $HClO<HCl{O}_2<HCl{O}_3<HCl{O}_4$. Reason: The order of increasing number of resonating structure of their conjugate base are $HClO<HCl{O}_2<HCl{O}_3<HCl{O}_4$.

• A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
• B. Both Assertion and Reason are true and Reason is NOT the correct explanation for Assertion
• C. The Assertion is true, Reason is false
• D. The Assertion is false, Reason is true

Answer 1

The correct option is A Both Assertion and Reason are true and Reason is the correct explanation of Assertion

The acidic strength of oxyacids of chlorine are in the order $HClO<HCl{O}_2<HCl{O}_3<HCl{O}_4$.
As the oxidation number increases, the acidic character increases.
The order of increasing number of resonating structure of their conjugate base are $HClO<HCl{O}_2<HCl{O}_3<HCl{O}_4$.
Stronger is the acid, weaker is its conjugate base and vice versa. With increase in the number of resonating structures, the relative basic character of the conjugate base decreases.
Thus, Assertion is true, Reason is true and Reason is the correct explanation for Assertion.