Q.1 Non-biodegradable pollutants are created by

1. nature

2. excessive use of resources

3. humans

4. natural disasters

Subtopic:  Solid Waste Pollution |
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Q. 8 Which of the following material takes the longest time for biodegradation?

1. Cotton

2. Paper

3. Bone

4. Jute

Subtopic:  Solid Waste Pollution |
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Q.17 Which one of the following impurities is easiest to remove from waste
water?

1. Bacteria

2. Colloids

3. Dissolved solids

4. Suspended solids

Subtopic:  Solid Waste Pollution |
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