Question

Given below are two statements Statement--I: Conjugate base of hypochlorous acid is \(\mathrm{OCl^-}\) Statement--II: The value of \(K_w\) does not depend on temperature The correct answer is

• A. Both statements I and II are correct
• B. Statement I is correct but statement II is not correct
• C. Statement I is not correct but statement II is correct
• D. Both statements I and II are not correct

Hint:

Remember: \[ \boxed{ \mathrm{HOCl \xrightarrow{-H^+} OCl^-} } \] Also, \[ \boxed{ K_w \text{ is temperature dependent.} } \]

Answer 1

The Correct Option is B

Step 1: Examine Statement--I. Hypochlorous acid is \[ \mathrm{HOCl}. \] On losing a proton, \[ \mathrm{HOCl \rightarrow H^+ + OCl^-}. \] Hence, the conjugate base of hypochlorous acid is \[ \boxed{\mathrm{OCl^-}}. \] Therefore, Statement--I is correct.

Step 2: Examine Statement--II. The ionic product of water, \[ K_w=[\mathrm{H^+}][\mathrm{OH^-}], \] depends on temperature because the ionization of water is an endothermic process. Thus, \[ \boxed{K_w \text{ increases with increase in temperature}.} \] Therefore, Statement--II is incorrect. Hence, \[ \boxed{\text{Statement I is correct but Statement II is not correct}.} \] Therefore, \[ \boxed{(B)} \] is the correct answer.