A ketone reacted with ethyl magnesium bromide followed by hydrolysis gave a product which on dehydration gave an alkene. The alkene on ozonolysis gave diethyl ketone and acetaldehyde. The ketone is-

Options

A. dimethyl ketone
B. diethyl ketone
C. ethyl methyl ketone
D. ethyl propyl ketone

Answer

B

Explanation

`underset("Diethyl ketone") ( CH_3 CH_2 underset(O ) underset(||) C CH_2 CH_3 ) underset((ii) H_2O) overset((i)C_2H_% MgBr) to CH_3- underset(OH) underset(|) overset(C_2 H_5) overset(|) C-CH_2 CH_3 overset(H_2 O ^+) to underset(underset ("diethyl ketone "))(CH_2CH_2 COCH_2 CH_3) + underset("Acetadehyde ")(CH_3 CHO) CH_3 CH_2 - underset(darr O_2 H_2 O) overset(C_2 H_5) overset(|) C=CHCH_3`