Question
Environmental Chemistry Question on Nitrogen Fixation
Which one of the following conversions belongs to nonsymbiotic nitrogen fixation?
A
Atmospheric nitrogen to ammonia by Rhizobium bacteria in nodules attached to roots of legumes
B
Atmospheric nitrogen to ammonia by Azotobacter species
C
Nitrate to gaseous nitrogen under anaerobic conditions
D
Nitrate to ammonia under aerobic conditions
Answer
Atmospheric nitrogen to ammonia by Azotobacter species
Explanation
Solution
The correct answer is (B) : Atmospheric nitrogen to ammonia by Azotobacter species