Incorrect statement among the following is;
I) ${LiAlH}_{4}$ can reduce an amide into an amine without change in the number of carbon atoms
II) A primary amide can be reduced to a primary amine by ${Br}_{2} / KOH$ with the same number of carbons
III) A primary amide can be reduced to a primary amine by ${LiAlH}_{4}$ with $(n - 1)$ carbon atoms
IV) Hoffmann's bromamide reaction is useful to prepare aniline from benzamide

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III and IV

II only

I only

II and III

answer is D.

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Detailed Solution

A primary amide cannot be reduced to a primary amine by ${Br}_{2} / KOH$ with the same number of carbons. A primary amide cannot be reduced to a primary amine by ${LiAlH}_{4}$ with (n-1) carbon atoms. A primary amide can be reduced to a primary amine by ${LiAlH}_{4}$ with $n$ carbon atoms.

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