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(B) Atmospheric nitrogen is chemically inert and cannot be directly utilized by plants. One of the natural ways to fix atmospheric nitrogen into nitro

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Lightning

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(B) Atmospheric nitrogen is chemically inert and cannot be directly utilized by plants. One of the natural ways to fix atmospheric nitrogen into nitrogenous compounds (like nitrates) is through physical processes. During lightning (electric discharge),the high temperature and pressure cause nitrogen $(N_2)$ and oxygen $(O_2)$ in the atmosphere to react,forming nitrogen oxides. These oxides subsequently dissolve in rainwater to form nitric acid,which reaches the soil and is converted into nitrates,which are then absorbed by plants. Therefore,$10\%$ of natural nitrogen fixation occurs due to lightning.

Column-$I$	Column-$II$
$I$. Nitrosomonas	Nitrite to nitrate
$II$. Thiobacillus	Denitrification
$III$. Nostoc	Free-living nitrogen fixer
$IV$. Azotobacter	Anaerobic nitrogen fixer

One of the ways in which the nitrogen of the atmosphere is converted into nitrate for plants is by the action of

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The concentration of nitrogen in the atmosphere remains constant due to:

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Nitrifying bacteria,$Nitrosomonas$ and $Nitrobacter$,perform which of the following functions?

Choose the correct pair:
Column-$I$ Column-$II$
$I$. Nitrosomonas Nitrite to nitrate
$II$. Thiobacillus Denitrification
$III$. Nostoc Free-living nitrogen fixer
$IV$. Azotobacter Anaerobic nitrogen fixer

Nitrifying bacteria are those which can convert

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