Question

Match the following ​
​

Column - A	Column B
1. Oxides of sulphur and nitrogen​	A. Fire extinguisher​
2. CNG	B. incomplete combustion of coal​
3. Oxygen	C. very low ignition temperature​
4. Iinflammable substances​	D. acid rain​
5. carbon dioxide​	E. necessary for combustion​
6. Carbon monoxide​	F. fuel of automobiles​

• A. 1 - D, 2 - F, 3 - E, 4 - C, 5 - A, 6 - B
• B. 1 - D, 2 - F, 3 - E, 4 - C, 5 - B, 6 - A

Answer 1

The correct option is A 1 - D, 2 - F, 3 - E, 4 - C, 5 - A, 6 - B

1. Oxides of sulphur and nitrogen​

D. acid Rain​

Oxides of sulphur and nitrogen (produced from the combustion of fuels) combine with rainwater, making it acidic.​

2. CNG ​

F. fuel for automobiles​

CNG is used as a fuel in automobiles.​

3. Oxygen ​

E. necessary for combustion​

Burning of substances in air (oxygen) is called combustion. Therefore, oxygen is necessary for combustion.​

4. Inflammable substances ​

C. very low ignition temperature. ​

Inflammable substances will have very low ignition temperature. They catch fire easily.​

​
5. Carbon dioxide ​

A. Fire extinguisher. ​

Carbon dioxide stops the influence of oxygen because it displaces the oxygen present near the source of fire which extinguishes the fire. Hence, it is used as a fire extinguisher.​

6. Carbon monoxide​

B. incomplete combustion of coal​

Incomplete combustion of coal releases carbon monoxide because of the insufficient supply of oxygen.​