The nitrogen cycle is the movement of nitrogen between the earth and………
a) sun
b) atmosphere
c) moon
d) none of these
Nitrogen gas can be fixed by…………..ways
a) one
b) seven
c) three
d) four
Explanation: Nitrogen gas can be fixed by three ways which are atmospheric fixation, industrial fixation and biological fixation
Atmospheric fixation of nitrogen is……………
a) 50%
b) 5-8%
c) 4%
d) 10%
Industrial fixation of nitrogen is……………….
a) 2%
b) 70%
c) 32-35%
d) 41-45%
Biological fixation of nitrogen is……………..
a) 70%
b) 40%
c) 60%
d) none of these
The process which is used for making nitrogen containing fertilizers
a) nelson process
b) Haber’s process
c) both a and b
d) none of these
