MHT CET · Chemistry · Amines

Which from the following statement is NOT correct regarding Mendius reduction?

A It is useful for preparation of \(\mathrm{R}-\mathrm{NH}_2\).
B In this alkyl cyanides are reduced.
C In this sodium and ethanol is used for reduction.
D In this method one carbon atom is lost in the form of \(\mathrm{CO}_2\).

Verified Solution

Answer & Solution

Correct Answer

(D) In this method one carbon atom is lost in the form of \(\mathrm{CO}_2\).

Step-by-step Solution

Detailed explanation

Mendius reduction is a chemical reaction that involves the reduction of alkyl cyanides (nitriles) to primary amines using sodium in ethanol. This reaction is useful in organic synthesis for converting nitriles into amines.

Apply the relevant identity from the chapter and substitute the values established in the previous step, keeping the original constraint in view.

Use the simplified expression to isolate the unknown, then plug the result back into the question setup to confirm the working is internally consistent.

Cross-check against a boundary or limiting case. Both the dimensional balance and the qualitative behaviour at the extreme should agree with the candidate answer.

Combine the steps above to identify the correct option. The remaining choices each fail at least one of the consistency, dimensional, or boundary checks.

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