Water — CHEMISTRY STD 6 — Question

Name two air pollutants which cause global warming.

Give reason:Argon is filled in electric bulbs.

write the correct statement:
The constituents of a mixture are present in a fixed ratio.

Name the phenomenon which causes the following changes:
Formation of water vapour from water

Explain the importance of nitrogen of the air for plant growth.

What is atmosphere ?

Name a few consumer products made by chemists. How are these products useful to us?

Answer the following questions in short:
Why is rainwater considered the purest form of natural water?

Select natural and man made matter from the following list:
Wood, plastic, silk, medicines, detergents, coal, water, ceramic, cotton, glass, nylon, fruits.

Give one difference between atoms and molecules.