Question

Complete the following reaction :

$RNH_{2} + H_{2}SO_{4} \rightarrow$

• A. $\lbrack RNH_{3}\rbrack^{+}HSO_{4}^{-}$
• B. $\lbrack RNH_{3}\rbrack_{2}^{+}SO_{4}^{2 -}$
• C. $RNH_{2}.H_{2}SO_{4}$
• D. No reaction

Answer 1

Answer: (B)

$\lbrack RNH_{3}\rbrack_{2}^{+}SO_{4}^{2 -}$

Answer 2

Amines are basic in nature, hence form salts with acid.

$\mathbf{2RN}\mathbf{H}_{\mathbf{2}}\mathbf{+}\mathbf{H}_{\mathbf{2}}\mathbf{S}\mathbf{O}_{\mathbf{4}}\mathbf{\rightarrow}\mathbf{\lbrack RN}\mathbf{H}_{\mathbf{3}}^{\mathbf{+}}\mathbf{\rbrack}_{\mathbf{2}}\mathbf{S}\mathbf{O}_{\mathbf{4}}^{\mathbf{2}\mathbf{-}}$