The world’s most problematic aquatic weed is:

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

Subtopic:  Water Pollution |
 95%
From NCERT

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Which of the following exhibits biomagnifications?

1. SO2           2. Mercury
3. DDT 4. Both 2 & 3
Subtopic:  Water Pollution |
 85%
From NCERT

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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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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%
From NCERT

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Match the following and choose the correct option.

Column I Column II
A. Environment Protection Act i. 1974
B. Air prevention & Control of pollution Act ii. 1987
C. Water act iii. 1986
D. Amendment of Air Act to include noise as an air pollutant iv.  1981


The correct match is :

Options: A B C D
1. iii iv i ii
2. i iii ii iv
3. iv i ii iii
4. iii iv ii i

Subtopic:  Introduction to Pollution & Types | Air Pollution | Water Pollution |
 85%
From NCERT

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Which one of the following diseases is not caused due to contamination of water?

1. Hepatitis-B 2. Jaundice
3. Cholera 4. Typhoid

Subtopic:  Water Pollution |
 87%
From NCERT

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Nuisance growth of aquatic plants and bloom-forming algae in natural waters is generally due to high concentrations of:

1. Carbon 2. Sulphur
3. Calcium 4. Phosphorus

Subtopic:  Water Pollution |
 77%
From NCERT

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