Hygroscopic substances are used as __________ agents.

(a)

oxidizing

(b)

reducing

(c)

decarboxylating

(d)

drying

Solubility of a solute is governed by

(a)

nature of solute and solvent

(b)

temperature

(c)

pressure

(d)

all the above

Under which of the following cases, dissolution of sugar will be rapid?

(a)

Sugar crystal in hot water

(b)

Sugar crystal in cold water

(c)

Powdered sugar in hot water

(d)

Powdered sugar in cold water

A beaker contains a solution of copper sulphate. precipitation of copper sulphate takes place when small amount of it added to ________ solution.

(a)

Saturated

(b)

Super saturated

(c)

Unsaturated

(d)

Concentrated

Quick lime is dissolved in water is a ______________ process.

(a)

exothermic

(b)

endothermic

(c)

reversible

(d)

both (a) and (b)