Question

use Q5) Nitrogen present in the air cannot be used directly by the plants.So how do they use nitrogen?​

Answer 1

Answer: Plants do not use nitrogen directly from the air because nitrogen is noble gas and is unreactive, and cannot be used by green plants to make protein. Nitrogen gas therefore, needs to be converted into nitrate compound in the soil by nitrogen-fixing bacteria in soil, root nodules so that plants can use it.

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Answer 2

Answer:

nitrogen is noble gas and is unreactive

to make fertilisers, nitric acid, nylon, dyes and explosives

Explanation:

Plants do not use nitrogen directly from the air because nitrogen is noble gas and is unreactive, and cannot be used by green plants to make protein. Nitrogen gas therefore, needs to be converted into nitrate compound in the soil by nitrogen-fixing bacteria in soil, root nodules so that plants can use it.

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.