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

Options

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 nitrogeneous compounds
D. the plants used as cereal crops in field

Answer

A

Explanation

Nitrogen gas makes up approx imatily `78%` of our atmosphere and nitrogen is also a part of molecules essential for life like proteins, nucleic acids (DNA and RNA). It is thus an essential nutrients for all life forms. The nitrogen molecules present in air can be converted into nitrates and nitries by a biological process of nitrogen fixing bacteria (present in the soil or present in association with plants).