Question

Which of the given species can act as both Bronsted 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 that can donate protons (H+) and Lewis acids are the compounds that can donate their lone pair. Here, only $N{H}_4^{+}$ ions can act as both Bronsted acid and Lewis acid.