i) Write IUPAC name of `CH_(3)CH_(2)NH_(2)`.
ii) Arrange the following amines in the order of their increasing basic strength in aqueous solution.
`(CH_(3))_(3)N_(1), (CH_(3))_(2)NH_(1), CH_(3)NH_(2)`.

Explanation

(a) When amide is heated with bromine and sodium hydroxide , `1^(0)` - amine is formed.
`R-Co-NH_2+Br_2+4NaOH(aq) overset(Delta)(rarr)R - NH_2 + Na_2CO_3 + 2NaBr + 2H_2O`
(b) (i) Ethanamine
(ii) `(CH_3)_(3)N < CH_3NH_2 < (CH_3)_(2)NH`
(c ) `C_6H_5N_(2)^(+)Ci^(-) + NaCl + 2H_2O`