Question

Which of the following react as a base : P(OH)${}_3$ or Al(OH)${}_3$.
If Al(OH)${}_3$ enter 1, or else enter 0

• A. 1

Answer 1

The correct option is A 1
$P(OH{)}_3$ reacts as a base whereas $Al(OH{)}_3$ is amphoteric in nature. It reacts as an acid as well as a base. It dissolves in acid, forming $\left[Al\right(H_{2}O{)}_6{]}^{3+}$ (hexaaquaaluminium) or its hydrolysis products.
It also dissolves in strong alkali, forming $\left[Al\right(OH{)}_4{]}^{-}$ (tetrahydroxidoaluminate).