The material generally used for soundproofing rooms like a recording studio or an auditorium is:

1. Cotton 2. Coir
3. Wood 4. Styrofoam

Subtopic:  Air Pollution |
 70%

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Compressed Natural Gas (CNG) is:

1.  Propane 2.  Methane
3.  Ethane 4.  Butane
Subtopic:  Air Pollution |
 61%

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The world’s most problematic aquatic weed is:

1.  Azolla                2.  Wolffia
3. Eichhornia 4. Trapa

Subtopic:  Water Pollution |
 95%
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Which of the following exhibits biomagnifications?

1. SO2           2. Mercury
3. DDT 4. Both 2 & 3
Subtopic:  Water Pollution |
 85%
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The expanded form of DDT is:
1. Dichloro diphenyl trichloroethane
2. Dichloro diethyl trichloroethane
3. Dichloro dipyridyl trichloroethane
4. Dichloro diphenyl tetrachloroacetate

Subtopic:  Water Pollution |
 80%

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Which of the following material takes the longest time for biodegradation?

1. Cotton 2. Paper
3. Bone 4. Jute

Subtopic:  Solid Waste Pollution |
 73%

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Choose the incorrect statement:

1. The Montreal Protocol is associated with the control of the emission of ozone-depleting substances
2. Methane and carbon dioxide are greenhouse gases
3. Dobson units are used to measure the oxygen content of air
4. Use of incinerators is crucial to the disposal of hospital wastes

Subtopic:  Ozone Layer Depletion |
 90%
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Among the following, which one causes the maximum indoor chemical pollution?
1. Burning coal
2. Burning cooking gas
3. Burning mosquito coil
4. Room spray

Subtopic:  Air Pollution |
 61%

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The green scum seen in the freshwater bodies is:
1. Blue-green algae
2. Red algae
3. Green algae
4. Both 1 and 3

Subtopic:  Water Pollution |
 72%

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The loudness of a sound that a person can withstand without discomfort is about:

1. 150 dB    2. 215 dB
3. 30 dB 4. 80 dB

Subtopic:  Introduction to Pollution & Types |
 52%
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