In the following sequence of reactions
`(CH_(3))_(2)CO underset(H_(2)SO_(4))overset(HN_(3))rarrA overset(H_(2)O)rarrB`
The end product 'B' is .

Options

A. `CH_(3)CH_(2)NH_(2)`
B. `CH_(3)NH_(2)`
C. `CH_(3)CONHCH_(3)`
D. `(CH_(3))_(2)CHNH_(2)`

Answer

B

Explanation

The reaction between a ketone and hydrazoic acid `(HN_(3))` in the presence of concentrated sulphuric acid (Schmidt reaction) leads to the formation of N-alkylamide which on hydrolysis yields a primary amine.
`CH_(3)COCH_(3)overset(HN_(3))underset(H_(2)SO_(4))rarrunderset((A))(CH_(3)CONHCH_(3))overset(H_(2)O)rarrunderset((B))(CH_(3)NH_(2))+CH_(3)CO_(2)H`