A) Pseudomonas
B) Nitrobacter
C) Nitrosomonas
D) Nitrococcus
Correct Answer: A
Solution :
The reduction of nitrates to nitrogen gas or nitrous oxide by certain microorganisms is called denitrification. Some microoganisms responsible for this are Thiobacillus, Pseudomonas and Bacillus. Nitrosomonas and Nitrosococcus converted \[N{{H}_{3}}\]to\[NO_{2}^{-},\]while Nitrobacter converted\[N{{O}_{2}}\]to\[N{{O}_{3}}\].
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