Chloromethane on treatment with excess of ammonia yields mainly

Options

A. N, N-dimethylmethanamine
B. N-methylmethanamine `(CH_3-NH-CH_3)`
C. Methanamine `(CH_3NH_2)`
D. Mixture containing all these in equal proportion

Answer

C

Explanation

Chloromethane on treatment with excess of ammonia yields mainly methamine.
`CH_3Cl+underset("Excess")NH_3 rarr underset("Methanamine")(CH_3NH_2)+HCl`
However, if the two reactants are present in the same amount, then the mixture of primary, secondary and tertiary amine is obtained
`CH_3Cl+NH_3rarr underset("Primary amine")(CH_3NH_2)+HCl`
`CH_3NH_2+CH_3Cl rarr underset("(Secondary amine)")((CH_3)_2)NH+HCl`
`CH_3NH_2+CH_3Cl rarr underset("(Tertiary amine)")((CH_3)_3)N+HCl`
`(CH_3)_3N+CH_3Cl rarr underset("(Quatemary ammonium salt)")(CH_3)_4overset(+)(N)overset(-)(Cl)`]