Q. No.Environmental chemistry is best defined as :
1. Study of chemical processes in nature.
2. Study of biochemical processes in nature.
3. Both (1) and (2)
4. None of the above.
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Tropospheric pollution arises due to the presence of:
| 1. | SO2, SO3, and NO2, in the lowest layer of the atmosphere. |
| 2. | SO2, SO3, and NO2, in the uppermost layer of the atmosphere. |
| 3. | SO2, SO3, and NO2, in the middle layer of the atmosphere. |
| 4. | All of the above. |
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CO gas is more dangerous than CO2 gas because :
1. CO is capable of forming a complex with haemoglobin (carboxyhemoglobin), that is more stable than the oxygen-haemoglobin complex.
2. CO is capable of forming a complex with haemoglobin (carboxyhemoglobin), that is less stable than the oxygen-haemoglobin complex.
3. CO2 is capable of forming a complex with haemoglobin (carboxyhemoglobin), that is more stable than the oxygen-haemoglobin complex.
4. CO2 is capable of forming a complex with haemoglobin (carboxyhemoglobin), that is less stable than the oxygen-haemoglobin complex.
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Gases responsible for greenhouse effect are :
1. Carbon dioxide (CO2)
2. Ozone (O3)
3. Nitrous oxide (N2O)
4. All of the above.
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Statues and monuments in India are affected by acid rain because of the formation of :
| 1. | CaSO4 on the reaction of acid rain with limestone. |
| 2. | CaCO3 on the reaction of acid rain with limestone. |
| 3. | Ca(HCO3)2 on the reaction of acid rain with limestone. |
| 4. | None of the above. |
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The correct statement(s) regarding photochemical smog is/are:
| 1. | It occurs in a dry, sunny climate. |
| 2. | It is oxidizing in nature. |
| 3. | It is composed of PAN, acrolein, formaldehyde, nitrogen oxide, and ozone. |
| 4. | All of the above. |
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The reaction/s involved during the formation of photochemical smog are:
\(1. \space NO_2(g) \rightarrow NO(g) + \stackrel{\cdot}{O(g)}\)
\(2. \stackrel{\cdot}{O(g)} + O_2(g) \rightarrow O_3(g)\)
\(3.\space O_3(g) + NO(g) \rightarrow NO_2(g) + O_2(g)\)
4. All of the above
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The reaction(s) involved in ozone layer depletion in the stratosphere is/are:
| 1. |  |
| 2. |  |
| 3. |  |
| 4. | All of the above |
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Consequence(s) of ozone hole is/are:
| 1. | They cause death of many phytoplanktons. |
| 2. | Excess exposure may even cause mutation in plants. |
| 3. | It leads to the ageing of skin, cataracts, skin cancer, and sunburns. |
| 4. | All of the above. |
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The major pollutant(s) of water pollution is/are:
1. Pathogens.
2. Organic waste.
3. Chemical components.
4. All of the above.
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