Question

The nitrogen molecules present in air can be converted into nitrates and nitrites by:

• A. a biological process of nitrogen-fixing bacteria present in soil
• B. a biological process of carbon fixing factor present in soil
• C. any of the industries manufacturing nitrogenous compounds
• D. the plants used as cereal crops in field

Answer 1

The correct option is A

a biological process of nitrogen-fixing bacteria present in soil

The correct answer is option A.

Explanation of the correct option:

1. Nitrogen fixation is a biological process that involves nitrogen-fixing bacteria in the soil converting nitrogen molecules in the air into nitrates and nitrites.
2. Plants generate nutrients from various elements that they get from the atmosphere as well as the soil.
3. Plants get nitrogen from the soil and use it in the protein synthesis process.
4. Atmospheric nitrogen, unlike oxygen and carbon dioxide cannot be acquired through the stomata of leaves.

Final answer

The nitrogen molecules present in air can be converted into nitrates and nitrites by a biological process of nitrogen-fixing bacteria present in soil.