question_answer

\[Aldehyde(A)\xrightarrow{N{{H}_{2}}OH.HCl}(B)\xrightarrow{{{H}^{\oplus }}}MeN{{H}_{2}}+HCOOH\] Aldehyde  and compound , respectively, are

(I) \[MeCHO\]

(II) \[HCHO\]

(III)

(IV)

A) I, IV

B) I, III

C) II, III

D) II, IV

Correct Answer: A

Solution :

[a] It is an example of Backmann rearrangement reaction. (Anti elimination) \[(Me)\] and \[(OH)\] must be in anti position.