Pollution of Air and Water-Air Pollution [CBSE (Central Board of Secondary Education) Class-8 Science]: Questions 8 - 10 of 10
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Question 8
Question MCQ▾
The substances which contaminate the air are called as:
Choices
| Choice (4) | Response | |
|---|---|---|
a. | Air pollutants | |
b. | Methane, Radon gas | |
c. | Dust particles, Smoke and carbon monoxide | |
d. | Volcanic activities | |
Question 9
Question MCQ▾
Smog is the combination of the:
Choices
| Choice (4) | Response | |
|---|---|---|
a. | Smoke and carbon monoxide | |
b. | Pollution caused by chemicals | |
c. | Smoke and fog | |
d. | Rain mixed with sulphur dioxide and nitrogen dioxide | |
Question 10
Question MCQ▾
Efforts made to reduce pollution from mobile sources include:
Choices
| Choice (4) | Response | |
|---|---|---|
a. | Automobiles use should be lessened | |
b. | Using smokeless sources of energy AND Plantation of new trees | |
c. | Use of electrostatic precipitator | |
d. | All b., a. and c. are correct | |