1.

The correct order of reactivity of aldehydes and ketones towards hydrogen cyanide is

Answer»

`CH_(3)COCH_(3) GT CH_(3)CHO gt HCHO`
`CH_(3)COCH_(3) gt HCHO gt CH_(3)CHO`
`CH_(3)COCH_(3) gt CH_(3)COCH_(3)gt HCHO`
`HCHO gt CH_(3)CHO gt CH_(3)COCH_(3)`

Solution :Hydrogen cyanide (HCN) undergoes nucleophilic addition reaction TOWARDS aldehydes and KETONES aldehydes and ketones CONTAINING more electrophilic carbonyare more reactivetowards nucleophilicaddittion reaction amongthe given compunds reactivity order is
`HCHO gt CH_(3)CHOgt CH_(3)COCH_(3)`


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