Question

In the reaction, ${PH_3 + HI ? PH_4I, PH_3}$ is behaving like

• A. dehydrating agent
• B. oxidising agent
• C. Lewis base
• D. Lewis acid.

Answer 1

Answer: (C)

Lewis base

Answer 2

Phosphine $(PH_3)$ is feebly basic and forms salts with mineral acids under anhydrous conditions.
{\underset{\mathrm{Phosphine}}{{PH_3}}$+ HX ->$\underset{\mathrm{Phosphonium , halide \\ (X=Cl,Br,I)}}{{PH^+_4 X^-}} }