Question

Assertion (A) $HI$ cannot be prepared by the reaction of $KI$ with conc. $H _{2} SO _{4}$.
Reason (R) $HI$ has lowest $H-X$ bond strength among halogen acids.

• A. Both $A$ and $R$ are correct; $R$ is the correct explanation of $A$.
• B. Both $A$ and $R$ are correct; $R$ is not the correct explanation of $A$.
• C. $A$ is correct; $R$ is incorrect.
• D. $R$ is correct; $A$ is incorrect.

Answer 1

Answer: (B)

Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
$HI$ cannot be prepared by the reaction of $KI$ with conc. $H _{2} SO _{4}$ because $HI$ is converted into $I _{2}$ on reaction with $H _{2} SO _{4}$.