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Environment In Relation To Human Welfare - Questions and Answers

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16. Some of the chemicals in the smoke dissolve in water droplets to form
A. Acid
B. Alcohol
C. Smog
D. Soot
Explanation:
17. The troposphere extends from the earth’s surface upto
A. 15 Km
B. 30 Km
C. 60 Km
D. 75 Km
Explanation:
18. Biologically active isotopes from Uranium – 235 are
A. Strontium – 90
B. Caesium – 137
C. Iodine – 131
D. All the three
Explanation:
19. A substance that occurs in the environment as a result of man’s activities and which has a deleterious effect on living organisms is called
A. Nutrient agent
B. Chemical agent
C. Pollutant
D. Biological agent
Explanation:
20. The major particulate pollutants are
A. Smoke and Radioactive dust
B. Water vapour and carbon dioxide
C. Methane and nitrous oxide
D. Sulphur dioxide and nitrogen dioxide
Explanation:
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