Question

For distinct between `CH_(3)CHO` and `C_(6)H_(5)CHO`, the used regent is
A. KCN
B. HCN
C. `NH_(2)OH`
D. `PCl_(5)`

Answer 1

Correct Answer - A
`CH_(3)-overset(O)overset(||)C-H-overset(KCN)rarrCH_(3)-overset(overset(-)(O)overset(+)(K))overset(|)underset(CN)underset(|)C-H`
But `PH-overset(O)overset(||)C-Hoverset(KCN)rarrPh-overset(O)overset(||)C-underset(OH)underset(|)CH-Ph`
In other reactions, the products are similar.