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environmental studies mcq for tet

6. What is BOD5?
(A) Biochemical Oxygen Demand in 5 hrs
(B) Biochemical Oxygen Demand in 5 days
(C) Biochemical Oxygen Demand in 5 months
(D) Biochemical Oxygen Demand in 5 minutes



7. What type of radiation is trapped on the earth’s surface by the green house effect?
(A) UV rays
(B) γrays
(C) Xrays
(D) IR rays



8. London smog is found in?
(A) Summer during day time
(B) Summer during morning time
(C) Winter during day time
(D) Winter during morning time



9. A tight whirlpool of wind formed in the stratosphere which surrounds Antarctica is called?
(A) Polar stratospheric cloud
(B) Polar Vortex
(C) Both (A) & (B)
(D) None of these



10. Bhopal gas tragedy occurred due to?
(A) Methane
(B) Phosgene
(C) Methylisocyanate
(D) Methyl amine