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Question 9The nitrogen molecules present in air can be converted into nitrates and nitrites by:(a) a biological process of nitrogen-fixing bacteria present in the soil(b) a biological process of carbon fixing factor present in the soil(c) any of the industries manufacturing nitrogenous compounds(d) the plants used as cereal crops in the field

Answer»

Question 9

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




(a) a biological process of nitrogen-fixing bacteria present in the soil

(b) a biological process of carbon fixing factor present in the soil

(c) any of the industries manufacturing nitrogenous compounds

(d) the plants used as cereal crops in the field





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