Question

2. Give two uses of the following components
present in air
(a) oxygen
(b) nitrogen
(c) carbon dioxide
(d) water vapour
n​

Answer 1

Explanation:

a.1.Used by human for breakdown of glucose fir producing energy

2.Used in combustion

b.1.It is used in fertilisers

2.its is used in making dyes

c.1.Used by plants in photosynthesis

2.Used in refrigerant

d.1.It is used for cooking

2.it helps in formation of clouds

Answer 2

Answer:

a) oxygen is mainly used for breathing of human beings which lead to survive them and also some animals

b)This is one reason why nitrogen is so enriched in the atmosphere relative to oxygen. The other primary reason is that, unlike oxygen, nitrogen is very stable in the atmosphere and is not involved to a great extent in chemical reactions that occur there.

c) carbon dioxide is mainly present for keeping the earth warm as it is green house gas but more gas is harmful because it leads to global warming

d) water vapour serves creates a positive feedback cycle for global warming. This means that the warmer the world gets, the more water vapour will exist in the air as evaporation rates from oceans, lakes, and streams

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