The correct statement about domestic waste is :

1. Only biodegradable domestic waste can be used as manure.
2. Non-biodegradable waste should be sent to industries for recycling.
3. It can be disposed off in a landfill.
4. All of the above.


 

Subtopic:  Soil Pollution & Waste Management |
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 Phytoplanktons kill the fish because :

1. Phytoplanktons decrease the BOD level that causes the death of fish.
2. Phytoplanktons increase the BOD level that causes the death of fish.
3. Phytoplanktons reduce the amount of dissolved CO2.
4. None of the above.

Subtopic:  Water Pollution - Biological Oxygen Demand |
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In the absence of greenhouse gases -

1. Life on earth would be impossible.
2. Average temperature of the earth will decrease drastically.
3. There will be no effect on Earth
4. Both (1) and (2)

Subtopic:  Air Pollution - Greenhouse Effect |
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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.

Subtopic:  Introduction |
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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.

Subtopic:  Air Pollution - Greenhouse Effect |
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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.

Subtopic:  Air Pollution - Greenhouse Effect |
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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.

Subtopic:  Air Pollution - Acid Rain |
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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.

Subtopic:  Air Pollution - Smog |
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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

Subtopic:  Air Pollution - Smog |
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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


 

Subtopic:  Air Pollution - Ozone |
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