In This Post we are providing Chapter-16 Environmental Issues Reproduction in Organism NCERT MCQ for Class 12 Biology which will be beneficial for students. These solutions are updated according to 2021-22 syllabus. These MCQS can be really helpful in the preparation of Board exams and will provide you with a brief knowledge of the chapter.
NCERT MCQ ON ENVIRONMENTAL ISSUES
1. Ultraviolet rays of the sunlight results in formation of
(a) Carbon monoxide
(b) Sulphur Dioxide
(c) Ozone
(d) Fluorides
Answer: (c) Ozone
2. Which of the following will not cause any atmospheric pollution?
(a) Hydrogen
(b) Sulphur Dioxide
(c) Carbon dioxide
(d) Carbon monoxide
Answer: (a) Hydrogen
3. Sewage water can be purified for recycling with the action of
(a) aquatic plants
(b) penicillin
(c) microorganisms
(d) fishes
Answer: (c) microorganisms
4. Today, concentration of greenhouse gases is high because of
(a) use of refrigerator
(b) increased combustion of oil and coal
(c) deforestation
(d) all of the above
Answer: (d) all of the above
5. Photochemical smog is related to the pollution of
(a) soil
(b) water
(c) noise
(d) air
Answer: (d) air
6. Most important causative pollutant of soil maybe
(a) plastics
(b) iron junks
(c) detergents
(d) glass junks
Answer: (a) plastics
7. Taj Mahal is threatened due to the effect of
(a) chlorine
(b) sulphur dioxide
(c) oxygen
(d) hydrogen
Answer: (a) chlorine
8. When huge amount of sewage is dumped into a river the BOD will
(a) increase
(b) remain unchanged
(c) slightly decrease
(d) decrease
Answer: (c) slightly decrease
9. Which is a fungicide?
(a) 2,4-D
(b) DDT
(c) Bordeaux mixture
(d) BHC
Answer: (c) Bordeaux mixture
10. Rotenone is
(a) a bioherbicide
(b) an insect hormone
(c) a natural herbicide
(d) a natural insecticide
Answer: (b) an insect hormone
11. Which of the following is not produced as exhaust of vehicles?
(a) sulphur dioxide
(b) carbon dioxide
(c) carbon monoxide
(d) fly ash
Answer: (c) carbon monoxide
12. Smog is
(a) smoke
(b) other name for dust storm
(c) moistened air gases
(d) smoke and fog
Answer: (c) moistened air gases
13. The most dangerous metal pollutant of automobile exhaust is
(a) cadmium
(b) silver
(c) lead
(d) manganese
Answer: (c) lead
14. Which one of the following is a greenhouse gas?
(a) carbon dioxide
(b) carbon monoxide
(c) ozone
(d) oxygen
Answer: (a) carbon dioxide
15. Smog produces
(a) O3
(b) NO2
(c) CH4
(d) Aluminum Ion
Answer: (d) Aluminum Ion
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