Question

Which of the following acts as both Bronsted acid and Lewis acid?

• A. $C{u}^{+2}$
• B. $S{O}_2$
• C. $F{e}^{+3}$
• D. $N{H}_4^{+}$

Answer 1

The correct option is D $N{H}_4^{+}$

Bronsted acids are the compounds which can donate proton $\left(H^{+}\right)$ and Lewis acids are the compounds which can donate their loan pair.
Herer, only $N{H}^{+}$ ion can act as both Bronsted acid and Lewis acid.
Hence, option D is correct.