Question

The principle behind purification by crystallisation is that the :

• A. amount of solute that can be dissolved by a solvent increases with temperature
• B. amount of solute that can be dissolved by a solvent decreases with increase in temperature
• C. both a and b
• D. none of above

Answer 1

The correct option is A amount of solute that can be dissolved by a solvent increases with temperature

Crystallisation is one of the very important purification techniques, purifying substances by removing unwanted by-products. Crystalline compounds are generally purified via this crystallisation process. The principle behind the crystallisation is that the amount of solute that can be dissolved by a solvent increases with temperature.