Question

The product 'P' in the above reaction is :

• A.

  undefined

• B.

  undefined

• C.

  

• D.

  

Hint:

Grignard + nitrile → ketone (1 equivalent), tertiary alcohol only with excess Grignard.

Answer 1

The Correct Option is B

Concept: Grignard reagent reacts with nitrile to form a ketone after hydrolysis.

Step 1: Reaction with nitrile.
\[ R-CN + CH_3MgBr \rightarrow \text{imine complex} \]

Step 2: Hydrolysis.
\[ \rightarrow R-CO-CH_3 \quad (\text{ketone}) \]

Step 3: Key point.
If only one equivalent of Grignard reagent is used, reaction stops at ketone stage.

Step 4: Conclusion.
Thus product is ketone, which matches option (B).