Question

List four factors which affect the rate of evaporation.

Describe an activity to show that water vapour is present in air.

Distinguish solids, liquids and gases in a tabular form under the following characteristics-

Assertion (A): The rate of mixing of copper sulphate or potassium permanganate crystals is faster in hot water than in cold water. Reason (R): The increased temperature of water decreases the kinetic energy of the water molecules, leading to faster movement and quicker dissolution of the crystals.

A motor car, with its glass totally closed, is parked directly under the sun. The inside temperature of the car rises very high. Explain why?