Give the names and formulae of two substances in each case :

(a) hydrated substance

(b) anhydrous substance

(c) liquid drying agent

(d) a basic drying agent

What is the effect of temperature on solubility of KNO₃ and CaSO₄ in water?

Which test will you carry out to find out if a given solution is saturated or unsaturated or supersaturated?

What is the effect of pressure on solubility of gases? Explain with an example.