Nitrates are converted to nitrogen by

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(C) The process of converting nitrates $(NO_3^-)$ back into atmospheric nitrogen $(N_2)$ is known as denitrification.This process is carried out by sp

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Denitrifying bacteria

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(C) The process of converting nitrates $(NO_3^-)$ back into atmospheric nitrogen $(N_2)$ is known as denitrification.This process is carried out by specific soil bacteria known as denitrifying bacteria.Examples of such bacteria include $Thiobacillus \ denitrificans$,$Pseudomonas \ aeruginosa$,and $Micrococcus \ denitrificans$.These bacteria reduce nitrates present in the soil into gaseous nitrogen,which then returns to the atmosphere.

Section $A$	Section $B$
$(i)$ Nitrosomonas	$(a)$ Nitrite $\rightarrow$ Nitrate
$(ii)$ Agrobacterium	$(b)$ Nitrogen fixative bacteria
$(iii)$ Rhizobium	$(c)$ $NO_3^- \rightarrow N_2$
$(iv)$ Nitrobacter	$(d)$ Ammonia $\rightarrow$ Nitrite
	$(e)$ Denitrifying bacteria

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........... $+$ .......... $\rightarrow 2NO_2^- + 2H^+ + 2H_2O$

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