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 the plants used as cereal crops in field
ScienceClass 9CBSEAnswered 27 Mar 2026
Answer
Answer is (a) a biological process of nitrogen fixing bacteria present in soil
Explanation:
Cereal plants cannot fix the nitrogen on their own. They comprise of bacteria in their root nodules which will convert nitrates to nitrites. This process is called as nitrogen fixation.
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