MCQ
Assertion $(A): \ce{RCHO, RCOCH_3}$ and cyclic ketones react with sodium bisulphite.
Reason $(R):$ Crystalline solid derivatives are formed when aldehydes or ketones are shaken with saturated aqueous solution of sodium bisulphite.
  • Both $A$ and $R$ are true and $R$ is the correct explanation of $A.$
  • B
    Both $A$ and $R$ are true but $R$ is not the correct explanation of $A.$
  • C
    $A$ is true but $R$ is false.
  • D
    $A$ is false but $R$ is true.

Answer

Correct option: A.
Both $A$ and $R$ are true and $R$ is the correct explanation of $A.$
$\mathrm{SO}_3$ is a large ion. Its addition is possible only under the condition that Image grouping is not sterically hindered as is the case for $\ce{RCHO, RCOCH_3}$ and cyclic ketones.

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