Match each item in Column I with one item in Column II and choose the correct answer from the code given below:

           COLUMN I                                                                  COLUMN II
A. Air [Prevention and Control of Pollution] Act                          a. 1981
B. Water [Prevention and Control of Pollution] Act                     b. 1974
C. Environment [Protection] Act                                               c. 1986
D. Montreal Protocol                                                               d. 1987

Codes:
             A.            B.                   C.              D.
1.          a              b                    c               d

2.          b              a                    d               c

3.          d              c                    b               a

4.          c              d                    a               b

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What is eutrophication?

1. The nutrient enrichment of lakes and ponds
2. The decrease in the pH of a lake or pond
3. The increase of water temperature of a lake or pond
4. The depletion of nutrients inlakes and ponds

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In what way does thermal pollution affect organisms?
1. Lowers the pH of water
2. Interrupts normal physiological pathways
3. Decreases oxygen supply in water
4. Increases oxygen supply in water

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Which of the following is not likely to happen as a result of the rising levels of CO2 in our atmosphere?

1. Increased incidents of skin cancer

2. Rise in sea levels

3. Change in climatic patterns

4. Shifts in locations of deserts and fertile regions

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The UN Conference of Parties on climate change in the year 2011 was held in 

(1) Poland

(2) South Africa

(3) Peru

(4) Qatar

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Which one of the following statements is not valid for aerosols ?

(a) They are harmful to human health
(b) They alter rainfall and monsoon patterns
(c) They cause increased agricultural productivity
(d) They have negative impact on agricultural land

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Biochemical Oxygen Demand (BOD) may not be a good index for pollution in water bodies receiving effluents from

(a) domestic service
(b) dairy industry
(c) petroleum industry
(d) sugar industry

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A lake which is rich in organic waste may result in
(a) increased population of aquatic organisms due to minerals
(b) drying of the lake due to algal bloom
(c) increased population of fish due to lots of nutrients
(d) mortality of fish due to lack of oxygen

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The highest DDT concentration in aquatic food chain shall occur in 
(a) phytoplankton
(b) seagull
(c) crab
(d) eel

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Depletion of which gas in the atmosphere can lead to an increased incidence of skin cancers
(a) ozone
(b) ammonia 
(c) methane
(d) nitrous oxide

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