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Q.

Which of the following expression describes nitrogen fixation?

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a

2NH4++ 2O2 + 8e– → N2 + 4H2O

b

2NH3 → N2 + 3H2

c

2N2 + glucose → 2 amino acids

d

N2 + 3H2 → 2NH3

answer is A.

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Detailed Solution

for reducing nitrogen to two molecules of  ammonia it requires three pairs of hydrogen atoms

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