The nitrogen molecules present in air can be converted into nitrates a

1.	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.
E.	None of these
Answer» B. A biological process of carbon fixing factor present in soil.

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

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