Q.1 Non-biodegradable pollutants are created by
1. nature
2. excessive use of resources
3. humans
4. natural disasters
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyQ. 8 Which of the following material takes the longest time for biodegradation?
1. Cotton
2. Paper
3. Bone
4. Jute
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & BiologyQ.17 Which one of the following impurities is easiest to remove from waste
water?
1. Bacteria
2. Colloids
3. Dissolved solids
4. Suspended solids
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NEET MCQ Books for XIth & XIIth Physics, Chemistry & Biology