Explain the differences between pure air and polluted air.

Explain the difference between endothermic and exothermic reactions with examples.

Explain the difference between thermoplastic and thermo-setting plastics.

Explain the difference between self-pollination and cross pollination.

A ray of light is incident from air on a glass plate. It is partly reflected and partly refracted. The phase difference between the reflected and refracted wave is :

Distinguish between a pure inductor and a pure resistor.

Major air pollutant is

The major air pollutant is

Explain the reaction of diborane when it is exposed to air?

What are the different types of pollution ?

Explain five effects of water pollution.