a
(a) \({H_2}S{O_4} \to {H^ + } + HSO_4^ - \) \({C_2}{H_5}OH + {H^ + }\mathop {\xrightarrow{{{\text{Protonation}}}}}\limits_{{\text{of}}\,\,{\text{alcohol}}} \mathop {{C_2}{H_5} - \mathop {\mathop O\limits_ \downarrow ^ \oplus }\limits_H - H}\limits_{{\text{Protonated alcohol}}} \)