Environmental Issues MCQ Questions for Class 12 Biology Chapter 16 with Answers

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NCERT MCQ Chapters for Class 12 Biology


Q1. Which one of the following diseases is not due to contamination of water ?

(A) Hepatitis-B
(B) Jaundice
(C) Cholera
(D) Typhoid.


(A) Hepatitis-B


Q2. Which of the following is an effect of waste accumulation?

(A) Urbanisation
(B) Over population
(C) Health problems
(D) Industrialisation


(C) Health problems


Q3. Which of the following will be able to cope with greenhouse effect?

(A) Hibernators
(B) Homeotherms
(C) Poikilotherms
(D) Stenotherms


(B) Homeotherms


Q4. Compressed Natural Gas (CNG) is:

(A) propane
(B) methane
(C) ethane
(D) butane.


(B) methane


Q5. Rain is called acid rain, its pH is below:

(A) 7
(B) 6.5
(C) 6
(D) 5.6


(D) 5.6


Q6. Increasing skin cancer and high mutation rate are the result of

(A) ozone depletion
(B) acid rain
(C) CO pollution
(D) CO2 pollution.


(A) ozone depletion


Q7. Peroxyacyl nitrates (PAN) are formed through photochemical reactions between

(A) sulphur oxides and hydrocarbons
(B) nitrogen oxides and hydrocarbons
(C) nitrogen oxides and O3
(D) CFCl3 and O3.


(B) nitrogen oxides and hydrocarbons


Q8. Acid Rain comes under which type of pollution?

(A) Water pollution
(B) Air pollution
(C) Soil pollution
(D) Sound Pollution


(C) Soil pollution


Q9. Catalytic converters are fitted into automobiles to reduce emission of harmful gases. Catalytic converters change unburnt hydrocarbons into:

(A) carbon dioxide and water
(B) carbon monoxide
(C) methane
(D) carbon dioxide and methane.


(A) carbon dioxide and water


Q10. Which of the following elements is responsible for Minamata disease?

(A) Pb
(B) Cd
(C) Fe
(D) Hg


(D) Hg


Q11. In normal adults, the enzyme which catalyses conversion of MHb into Hb is:

(A) MHb protease
(B) MHb oxidase
(C) MHb lipase
(D) MHb reductase


(D) MHb reductase


Q12. The material generally used for sound proofing of rooms like a recording studio and auditorium, etc. is:

(A) cotton
(B) coir
(C) wood
(D) styro foam.


(D) styro foam.


Q13. Bluebaby syndrome results from:

(A) Excess of TDS
(B) Excess of DO
(C) Excess of chloride
(D) Methaemoglobin


(D) Methaemoglobin


Q14. Ozone depletion is occurring widely in

(A) troposphere
(B) stratosphere
(C) ionosphere
(D) all of these.


(B) stratosphere


Q15. The Government of India has passed the environment (Protection) Act in the year

(A) 1990
(B) 1987
(C) 1986
(D) 1992.


(C) 1986


Q16. Ozone Layer is found in :

(A) Stratosphere
(B) Lithosphere
(C) Troposphere
(D) Hemisphere


(A) Stratosphere


Q17. The loudness of a sound that a person can withstand without discomfort is about

(A) 150 dB.
(B) 215 dB.
(C) 30 dB.
(D) 80 dB.


(D) 80 dB.


Q18. High value of BOD (Biochemical Oxygen Demand) indicates that :

(A) Water is highly polluted
(B) Water is less polluted
(C) Consumption of organic matter in the water is higher by the microbes
(D) Water is pure


(A) Water is highly polluted


Q19. Ozone depletion shall cause higher incidence of

(A) Decreased immunity only.
(B) Skin cancer only
(C) Skin cancer, Cataract and decreased immunity.
(D) Cataract only


(C) Skin cancer, Cataract and decreased immunity.


Q20. Non-biodegradable pollutants are created by:

(A) nature
(B) excessive use of resources
(C) humans
(D) natural disasters.


(C) humans


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