Earth’s Atmsphere

Proff. R. S. Sengar

1. Greenhouse gases are:

(a) CFC, NO2, H2S

(b) CO2, CH4, CFC, NO2

(c) N2O, CH4, SO2

(d) SO2, NO2, CO3

Ans. A

2. The property of sewage content being decomposed through microbial action is known as:

(a) Denitrification  (b) Purification

(c) Eutrophication  (d) Putresecibility

Ans. D

3. Ozone destroying substances include:

(a) CH4      (b) CFC

(c) N2O      (d) All of these

Ans. D

4. Depletion of ozone shield increases the amount of and:

(a) Cosmic rays   (b) U. V. C

(c) U. V. B       (d) U. V. A

Ans. C

5. Range of human hearing is:

(a) 20–200000 Hz (b) 200–2000 Hz

(c) 20–200 Hz     (d) 2–20 Hz

Ans. A

6. Frequency of sound is measured in:

(a) Fathoms      (b) Watts

(c) Harts     (d) Decibel

Ans. C

7. Ozone hole was discovered over:

(a) Europe        (b) Africa

(c) India      (d) America

Ans. D

8. CNG is:

(a) Coal Nitrate Gas

(b) Compressed Natural Gas

(c) Complete Nitrogen Gas

(d) Carbon Nitrogen Gas

Ans. B

9. National Environment Engineering Research Institute is at:

(a) Mumbai       (b) Delhi

(c) Nagpur        (d) Kanpur

Ans. C

10. Co is very harmful to humans because it:

(a) Blocks the respiratory tract

(b) Turns pH of blood to 3.5 from 7.4

(c) Inhibits ETC of cellular respiration

(d) Combines with haemoglobin & produce carboxy–haemoglobin which impairs oxygen transport

Ans. D

11. ‘Stone leprosy’ is due to:

(a) Smoke        (b) Acid Rain

(c) PAN      (d) Lichens

Ans. B

12. PAN stands for:

(a) Post aesthetic necrosis

(b) Peroxyacyl nitrate

(c) Para Amino nitrate

(d) Per acetyl nitride

Ans. B

13. The most Polluted city of the world is:

(a) Kolkata       (b) Mexico

(c) Tokyo         (d) New York

Ans. C

14. The major cause of air pollution in urban areas are:

(a) Oil Refineries 

(b) Automobiles

(c) Plastics, Cans

(d) Burning of fossil fuels

Ans. B

15. Bhopal gas tragedy in 1984 was due to the release of:

(a) CO. N2O

(b) CH4, N2O

(c) Phosgene &Methylisocyanate

(d) H2S, SO2

Ans. C

16. CFC acts as air pollutant despite its multiple uses:

(a) It along with NO2 reacts with ozone

(b) It corrods the metals and deteriorate pants

(c) Impair the sensation of smell

(d) It cause classification of ligaments

Ans. A

17. Which is the biodegradable pollutant?

(a) Asbestos      (b) Plastic

(c) Sewage       (d) Mercury

Ans. C

18. Biodegradable pollutants can:

(a) Rarely decomposed by microbes & produce highly toxic contents

(b) Degrade very rapidly

(c) Become a part of rapid turnover in biogeochemical cycle

(d) Produce energy, manure, and compost and biogas

Ans. A

19. The source of chloroflorocarbons/ feron is:

(a) Solid plastic foam 

(b) Refrigerators

(c) Propellents

(d) All of the above

Ans. D

20. In the area with heavy traffic, which gas is responsible for producing brown air or radish brown haze?

(a) NO2      (b) H2S

(c) CO2      (d) SO2

Ans. A

Writer: Professor R. S. Sengar, Director Training and Placement, Sardar Vallabhbhai Patel University of Agriculture and Technology, Modipuram, Meerut.