Pollution of air and water Worksheet-5

Pollution of air and water Worksheet-5

Multiple-Choice Question:

21. Oil slick causes mass scale death of fish due to-

(A) Clogging of gills

(B) Non-availability of oxygen in water

(C) Non-availability of food

(D) Disruption of food chain

22. Which one the following is not a green house gas/substance?

(A) CO­₂                   (B) CH₄              (C) O₂                   (D) CFCs

23. Ozone depletion shall cause higher incidence of-

(A) Skin cancers                           (B) Cataract

(C) Decreased immunity            (D) All

24. The wastes, which can be decomposed by  biological agents, are called-

(A) Non-biodegradable               (B) Bio-degradable

(C) Radio-active waste                (D) Domestic waste

25. Green house effect-

(A) Destroys the vegetation        (B) Increases eutrophication of lakes

(C) Keep the earth warm            (D) Decreases soil fertility

26. Pollution affects lives of the organisms as-

(A) It increases quality of life

(B) It reduces quality of life

(C) It has moderate effect on life

(D) It maintains quality of life

27. The metals which are air pollutants are-

(A) Silver, cadmium, asbestos

(B) Iron, manganese, copper

(C) Lead, nickel, mercury

(D) Arsenic, aluminimum, lead

Multiple Response:

28. Which is/are true for atmosphere?

(A) Density of air decreases with height

(B) Oxygen concentration is 78%

(C) Traces of noble gases are present

(D) Maximum conc. is of carbon dioxide

(E) Concentration of argon gas is .94%

29. What is true for air pollution?

(A) Air pollutant are solid, liquid or gas

(B) Caused by burning of coal in factories

(C) Caused by excessive use of fertilization

(D) Causes eutrophication

(E) Responsible for acid rain

30. Which of these are air pollutants?

(A) HCFCs                                     (B) Oxides of carbon

(C) Fertilizers                                (D) Photochemical oxidants

(E) Solid pesticides

Answer key:

21. (A)

22. (C)

23. (D)

24. (B)

25. (C)

26. (B)

27. (C)

28. (A,C,E)

29. (A,B,E)

30. (A,B,D)