Question

9
a. State the importance of following gases:-
(1) Oxygen (ii) Nitrogen
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Answer 1

Answer:

1) oxygen is helpful for human beings for their survival.

2) carbon dioxide is nessary for plants to make their food.

Answer 2

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Oxygen

Oxygen is essential for respiration because the body uses it to 'burn' food molecules. Animals take in oxygen when inhaling and give off carbon dioxide when exhaling. Oxygen makes up almost 21% of the total gases in air, with most of the remaining gas being physiologically inert nitrogen.

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Nitrogen

Nitrogen is important to the chemical industry. It is used to make fertilisers, nitric acid, nylon, dyes and explosives. To make these products, nitrogen must first be reacted with hydrogen to produce ammonia.

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