Question

Assertion :A substance that can either act as an acid or a base is called ampholyte. Reason: Bisulphide ion $\left(H{S}^{-}\right)$ and bicarbonate ion $\left(HC{O}_3^{-}\right)$ are ampholytes.

• A. Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
• B. Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
• C. Assertion is correct but Reason is incorrect
• D. Assertion is incorrect but Reason is correct

Answer 1

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

Ampholyte ion can undergo hydrolysis as well as ionization. Hence, it can either act as an acid or a base.
Bisulphide ion $\left(H{S}^{-}\right)$ and bicarbonate ion $\left(HC{O}_3^{-}\right)$ are ampholytes.

For example,
$H{S}^{-}+H_{2}O\rightleftharpoons S^{2-}+H_3{O}^{+}$

$H{S}^{-}+H_3{O}^{+}\rightleftharpoons H_{2}S+H_{2}O$