Which of the following is the industrial method of preparation of acetaldehyde

Options

A. `CH_3CN underset(HCl)overset(SnCl_2)to CH_3CH=NH overset(H_3O^(+))to CH_3CHO`
B. `CH_3COCl+H_2 underset(BaSO_4)overset(Pd)to CH_3CHO+HCl`
C. `CH_2=CH_2+H_2O overset(Pd^("++"))to CH_3CHO`
D. None of these

Answer

C

Explanation

This is Wacker process
`H_2C=CH_2+PdCl_2+H_2O underset("air or "O_2)overset(CuCl_2)to H_3C CHO+Pd+2HCl`
`[Pd+2HCl rarr PdCl_2+H_2`
`Pd+2CuCl_2 rarr PdCl_2+2CuCl]`.