Which one of the following used for purification of aldehydes ?

Options

A. NaOCI
B. `NaHSO_(4)`
C. `C_(5)H_(5)SO_(2)CI`
D. `Na_(2)SO_(4)`

Answer

B

Explanation

Carbonyl compound (aldehydes ) form solid additive products with `NaHSO_(3)` which get separated out. The solid bisulphites of carbonyl compound on hydrolysis by dilute acid regenerate carbonyl compound .Thus this property is used for purification of carbonyl compound
`CH_(3) - overset(O) overset(||)(C ) - H + NaHSO_(3) to CH_(3) - overset(O) overset(||) (C H) - SO_(3) Na`
`overset(H_(2)O)(to) CH_(3)* CHO +_ NaHSO_(3)`