MCQ on Environmental Sciences for various Agriculture Exams✅ Part - 15

1) Tannery effluent contains toxic heavy metal
i. Cr
ii. Zn
iii. Ni
iv. Pb

2) Commonly used method for sewage treatment in India is
i. Trickling filter
ii. Oxidation pond
iii. Activated sludge process
iv. Rotating biological contactor

3) Knock knee syndrome is due to
i. Arsenic toxicity
ii. Fluoride toxicity
iii. Cadmium toxicity
iv. Lead toxicity

4) Carcinogens adversely affect
i. Cell wall
ii. DNA
iii. Cell membrane
iv. Mitochondria

5) In body tissue DDT accumulates in
i. Muscles
ii. Bone
iii. Blood
iv. Fat

6) The national forest policy was accepted in
i. 1952
ii. 1972
iii. 1974
iv. 1986

7) COD is always
i. Lower than BOD
ii. Equal to BOD
iii. Equal to or higher than BOD
iv. 1.8 times of BOD

8) For stratospheric ozone depletion the major culprit is
i. CFCs
ii. Cl radical
iii. F radical
iv. N₂O