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-

A student takes some water in a beaker and heats it over a flame for determining its boiling point. He keeps on taking its temperature reading. He observes that the temperature of the water

The following figure illustrates the three states of matter and their interconversion. Identify the processes represented by A and B.