Q. No.Living in the atmosphere of CO is dangerous because it :
1. Combines with O2 present inside to form CO2
2. Reduces organic matter of tissues.
3. Combines with haemoglobin and makes it incapable to absorb oxygen.
4. Dilutes the blood.
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Biochemical oxygen Demand value less than 5 ppm indicates a water sample to be :
1. Highly polluted.
2. Poor in dissolved oxygen.
3. Rich in dissolved oxygen.
4. Not suitable for aquatic life.
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Photochemical smog formed in congested metropolitan cities mainly consists of :
1. Ozone, SO2, and hydrocarbons.
2. Ozone, PAN, and NO2
3. PAN, smoke and SO2
4. Hydrocarbons, SO2, and CO2
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The oxygen present today in the atmosphere-
1. Is a plant product.
2. Came from ozone.
3. Was present in the beginning.
4. Is produced by carbon dioxide.
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Air pollution from the leakage of methyl isocyanate gas from the union carbide factory in Bhopal caused a major tragedy on:
1. Dec. 2, 1984
2. Dec 15, 1983
3. Dec.10, 1982
4. Dec. 4, 1988
Gas that is not a pollutant is :
1. Carbon monoxide
2. Nitrogen peroxide
3. Carbon dioxide
4. Sulphur dioxide
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When rain is accompanied by a thunderstorm, the pH value of the collected rain water is :
1. Dependent upon the amount of dust in the air.
2. Slightly lower when rainwater is without a thunderstorm.
3. Slightly higher when the thunderstorm is not there.
4. Unaffected by the occurrence of thunderstorms.
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The aromatic compound that is present as particulate among the following is :
1. Benzene
2. Toulene
3. Nitrobenzene
4. Polycyclic hydrocarbons
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