Question

Aluminium hydroxide, $Al(OH{)}_3$, is insoluble in water but dissolves readily in both acidic and basic solutions. Such behaviour is characteristic of:

• A. polyprotic substance
  
• B. hydrophilic substance
  
• C. a buffer
• D. amphoteric substance
  

Answer 1

The correct option is D amphoteric substance

Aluminium hydroxide, $Al(OH{)}_3$, is insoluble in water but dissolves readily in both acidic and basic solutions. Such behavior is characteristic of amphoteric behavior.

An amphoteric substance reacts with acid as well as base to form a new compound.