...............gas doesn't burn, but it helps in burning.

Photosynthesis process depends on the presence of...............gas

The percentage of carbon dioxide gas in air is.....

...........gas is prepared by adding dilute hydrochloric acid to calcium carbonate.

We can extinguish fire using ......... gas.

Carbon dioxide gas is collected by..........

Nitrogen molecule consists of..........nitrogen atoms.

The scientist who discovered nitrogen gas was

Nitrogen is considered the main component of........

............ is called "azote" which means lifeless gas

..................... is (are) colourless, odorless and tasteless gas(es).

The percentage of oxygen gas in the atmosphere is ..............................

......................... is used as a catalyst in the preparation of oxygen in lab.

The gas which makes limewater turbid is ............................

Carbon dioxide is used in the industry of .........................

Nitrogen represents ................... of the Earth's atmosphere.