Question

Match the following

Column A	Column B
1. Preservation	(A) Source of $\mathrm{Nitrogen}$
2. Fire extinguisher	(B) $\mathrm{Argon}\mathrm{gas}$
3. Nitrates	(C) $\mathrm{Carbon}\mathrm{monoxide}$
4. Electric bulb	(D) $\mathrm{Neon}\mathrm{gas}$
5. In complete combustion of fossil fuels	(E) $\mathrm{CNG}$
	(F) $\mathrm{Nitrogen}$
	(G) $\mathrm{Carbon}\mathrm{dioxide}$

Answer 1

1. Preservation - (F) $\mathrm{Nitrogen}$

$\mathrm{Nitrogen}\mathrm{gas}\left({\mathrm{N}}_2\right)$ is nowadays widely used in packing to preserve food.

2. Fire extinguisher - (G) $\mathrm{Carbon}\mathrm{dioxide}$

$\mathrm{Carbon}\mathrm{dioxide}\left({\mathrm{CO}}_2\right)$ is neither burns nor supports combustion. Hence they are used in fire extinguishers.

3. $\mathrm{Nitrates}$ - (A) Source of $\mathrm{Nitrogen}$

$\mathrm{Nitrates}$ present in the soil gets converted into $\mathrm{Nitrogen}\mathrm{gas}\left({\mathrm{N}}_2\right)$ by Pseudomonas bacteria. This process is called denitrification.

4. Electric bulb -(B) $\mathrm{Argon}\mathrm{gas}$

$\mathrm{Argon}\mathrm{gas}$ filled in electric bulbs to prevent the oxidation of filament.

5. In complete combustion of fossil fuels -(C) $\mathrm{Carbon}\mathrm{monoxide}$

The air pollutant $\mathrm{Carbon}\mathrm{monoxide}\left(\mathrm{CO}\right)$is generated from the incomplete combustion of fossil fuels.

Column column	Column B
1. Preservation	(F) $\mathrm{Nitrogen}$
2. Fire extinguisher	(G)$\mathrm{Carbon}\mathrm{dioxide}$
3. Nitrates	(A) Source of $\mathrm{Nitrogen}$
4. Electric bulb	(B) $\mathrm{Argon}\mathrm{gas}$
5. In complete combustion of fossil fuels	(C) $\mathrm{Carbon}\mathrm{monoxide}$