Give reasons for the chemical inactivity of nitrogen at ordinary conditions.

The chemical inertness of nitrogen is due to

The density of nitrogen under standard conditions is

Give reason for the need of classification of element .

Give examples of chemical fertilizers.

Give an example for chemical pesticides.

Give the names of a few organisms that help in nitrogen fixation.

Give one example to chemical displacement.

The density of a gas is 2, relative to nitrogen, under the same conditions. The molecular weight of the gas is

Give the paramagnetic oxides of nitrogen.