Question

Ammonium chloride dissolves in water with the absorption of heat. Which of the following is true?

• A. The solubility of ammonium chloride decreases with increase in temperature
• B. The solubility of ammonium chloride increases with increase in temperature
• C. At higher temperature, ammonium chloride in solution exists as ammonia and hydrochloric acid
• D. At lower temperature, ammonium chloride in solution is present in the molecular form

Answer 1

The correct option is B The solubility of ammonium chloride increases with increase in temperature

When ammonium chloride dissolves in water, heat is absorbed.
Thus, the dissolution of ammonium chloride is an endothermic reaction.
When the temperature of endothermic reaction is increased, the value of the equilibrium constant increases.
Hence, the solubility of ammonium chloride increases with increase in temperature.