Class 11 chemistry MCQs with answers are provided here for chapter 14 Environmental Chemistry. These MCQs are based on the CBSE board curriculum and correspond to the most recent Class 11 chemistry syllabus. By practising these Class 11 Multiple choice questions, students will be able to quickly review all of the ideas covered in the chapter and prepare for the Class 11 Annual examinations as well as other entrance exams such as NEET and JEE.
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Class 11 Environmental Chemistry MCQs
1. The gas which reacts with haemoglobin in blood is ———
(a) CO
(b) SO2
(c) CO2
(d) NO
Ans: (a)
Solution: Carbon monoxide(CO) replaces oxygen by reacting with haemoglobin in the blood.
2. Ozone is present in ———————–
(a) Thermosphere
(b) Mesosphere
(c) Stratosphere
(d) Troposphere
Ans: (c)
Solution: Ozone is present in the stratosphere.
3. Acid rain is due to ————–
(a) Formation of oxide of sulphur
(b) Formation of oxide of nitrogen
(c) Formation of H2SO4 and HNO3
(d) All of these
Ans: (d)
Solution: Acid rain is due to all of the above reasons.
4. Biochemical oxygen demand (BOD) is a measure of ———–
(a) Organic pollutant in water
(b) Organic SPN in water
(c) Inorganic pollutants in water
(d) Particulate matter in water
Ans: (a)
Solution: Biochemical oxygen demand (BOD) is a measure of organic pollutant in water.
5. Freons are not recommended to be used in the refrigerator because they cause
(a) acid rain
(b) depletion of the ozone layer
(c) global warming
(d) BOD
Ans: (b)
Solution: Freons cause depletion of the ozone layer so it is not recommended in the refrigerator.
6. The gas released in the Bhopal gas tragedy was ———–
(a) Ammonia
(b) Methyl cyanide
(c) Nitrous oxide
(d) Methyl isocyanate
Ans: (d)
Solution: The gas released in the Bhopal gas tragedy was Methyl isocyanate
7. The major source of CO pollution is ————
(a) Forest fire
(b) Deforestation
(c) Automobile exhaust
(d) All of the above
Ans: (c)
Solution: The major source of CO pollution is automobile exhaust.
8. Which is a Greenhouse gas?
(a) CO2
(b) CH4
(c) CF2Cl2
(d) All of the above
Ans: (d)
Solution: All of the above gases such as CO2, CH4, and CF2Cl2 are Greenhouse gases.
9. Water pollution is less if BOD is
(a) Less than 5 ppm
(b) Less than 15 ppm
(c) Less than 50 ppm
(d) Less than 100 ppm
Ans: (a)
Solution: Water pollution is less if BOD is less than 5 ppm
10. Which is not a source of pollution?
(a) Forest fire
(b) Coal fire
(c) Volcanes
(d) None of the above
Ans: (d)
Solution: Among them, all are the sources of pollution.
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