Question

Pick the correct option regarding the statements given below:

Statement 1: Crystallisation is better than evaporation.
Statement 2: Some solids may get charred when heated to dryness.

• A. Both the statements are true
• B. Both the statements are false
• C. Statement 1 is true but statement 2 is false
• D. Statement 2 is true but statement 1 is false

Answer 1

The correct option is A Both the statements are true

Evaporation is a slow process, so usually, heat is supplied to speed it up. But often, heat has an adverse effect on the mixture that is to be separated. This happens because a few soilds can decompose and may get charred when heated to dryness.

Crystallisation is a process in which a solution is heated for a while and allowed to cool down. This will prevent charring of the solid and also helps in obtaining pure crystals of the solute.
Thus, crystallisation is better than evaporation.