What happens when:
(i). Methyl chloride is treated with alcoholic KCN.
(ii). Ethyl chloride is treated with alcoholic KOH.
(iii). Chloroform is heated with Ag powder.

Options

A. Methyl substituted chlorosilanes are formed
B. Only `Me_(4)Si` formed
C. Polymerised chains of `(CH_(3))_(3) SiCI` are formed
D. silicons are formed

Answer

A

Explanation

Methyl substituted chlorosilanes are formed which on hydrolysis give `Me_(2) Si(OH)_(2)` which polymerise to give silicones.
`2CH_(3) CI + Si underset(570 K)overset("cu. Powder)(to) (CH_(3))_(2) SiCI_(2) + CH_(3) SiCI_(3) + (CH_(3))_(3) SiCI + (CH_(3))_(4) Si`