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Standard VIII
Biology
Soil Fertility and Nitrogen Fixation
The nitrogen ...
Question
The nitrogen molecules present in the air can be converted into nitrates and nitrites by :
A
nitrogen fixation
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B
carbon fixation
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C
industries in the form of by ctprodu
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D
cereal plants
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Solution
The correct option is
A
nitrogen fixation
The nitrogen molecules present in the air can be converted into nitrates and nitrites by nitrogen fixation.
Hence the option A is correct.
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Q.
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 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
Q.
The nitrogen present in the air can be converted into nitrates by
Q.
Which of the following can convert the nitrogen molecules present in air into nitrates and nitrites?
(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
Q.
Nitrogen is first converted into nitrites by
, then into nitrates by
.
Q.
Atmospheric nitrogen is converted to usable forms like nitrites and nitrates by the process of ______ .
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