Class 12 Biology MCQ Chapter 17 Environmental Issues

Class 12 Biology MCQ Chapter 17 Environmental Issues Solutions English Medium to each chapter is provided in the list so that you can easily browse through different chapters Class 12 Biology MCQ Chapter 17 Environmental Issues Question Answer in English and select need one. AHSEC Class 12 Biology Objective Type Question Answer As Per AHSEC New Book Syllabus Download PDF. AHSEC Biology MCQ Class 12 Solutions.

Class 12 Biology MCQ Chapter 17 Environmental Issues

Also, you can read the NCERT book online in these sections Solutions by Expert Teachers as per Central Board of Secondary Education (CBSE) Book guidelines. AHSEC Class 12 Biology Multiple Choice Solutions in English Medium are part of All Subject Solutions. Here we have given AHSEC Class 12 Biology MCQ Question Answer English Medium for All Chapters, You can practice these here.

Environmental Issues

Chapter: 17

MCQs

Choose the Correct Option:

1. Which of the following devices is used to remove particulate matter from industrial exhaust?

(i) Catalytic converter.

(ii) Electrostatic precipitator.

(iii) Scrubber.

(iv) Muffler.

Ans: (ii) Electrostatic precipitator.

2. The main source of PM 2.5 particles in urban areas is:

(i) Factories.

(ii) CNG.

(iii) Automobiles.

(iv) Power plants.

Ans: (iii) Automobiles.

3. Lead in petrol is harmful because it:

(i) Enhances combustion.

(ii) Prevents noise.

(iii) Deactivates catalytic converter.

(iv) Removes CO₂.

Ans: (iii) Deactivates catalytic converter.

4. Which act includes noise as an air pollutant?

(i) Water Act, 1974.

(ii) Air Act, 1981 (Amended 1987).

(iii) Environment Protection Act, 1986.

(iv) Wildlife Protection Act, 1972.

Ans: (ii) Air Act, 1981 (Amended 1987).

5. Delhi successfully reduced air pollution by:

(i) Increasing petrol consumption.

(ii) Switching to diesel.

(iii) Using CNG.

(iv) Cutting trees.

Ans: (iii) Using CNG.

6. A sharp decline in dissolved oxygen in water bodies is due to:

(i) Fertilizers.

(ii) Oil spills.

(iii) Sewage discharge.

(iv) Plastic pollution.

Ans: (iii) Sewage discharge.

7. Biochemical Oxygen Demand (BOD) indicates:

(i) Toxicity.

(ii) Nutrient content.

(iii) Organic pollution.

(iv) Salinity.

Ans: (iii) Organic pollution.

8. Eutrophication is caused by:

(i) Heavy metals.

(ii) Thermal pollution.

(iii) Nutrient-rich sewage.

(iv) Oil spills.

Ans: (iii)  Nutrient-rich sewage.

9. Biomagnification of DDT causes:

(i) Coral bleaching.

(ii) Shell thinning in birds.

(iii) Skin cancer.

(iv) Mutations in plants.

Ans: (ii) Shell thinning in birds.

10. E-wastes primarily contain:

(i) Organic matter.

(ii) Paper and cloth.

(iii) Toxic heavy metals.

(iv) Pesticides.

Ans: (iii) Toxic heavy metals.

11. Which of the following is NOT a method of solid waste disposal?

(i) Sanitary landfill.

(ii) Composting.

(iii) Open burning.

(iv) Biomagnification.

Ans: (iv) Biomagnification.

12. Use of pesticides may lead to:

(i) Organic farming.

(ii) Increased fertility.

(iii) Biomagnification.

(iv) Eutrophication.

Ans: (iii) Biomagnification.

13. Ramesh Chandra Dagar promoted:

(i) Urban farming.

(ii) Chemical agriculture.

(iii) Integrated organic farming.

(iv) Industrial farming.

Ans: (iii) Integrated organic farming.

14. Radioactive substances are dangerous because they:

(i) Smell bad.

(ii) Cause mutations.

(iii) Generate heat.

(iv) Attract insects.

Ans: (ii) Cause mutations.

15. Safe disposal of nuclear waste is done by:

(i) Dumping in rivers.

(ii) Burning in air.

(iii) Deep burial.

(iv) Releasing into atmosphere.

Ans: (iii)  Deep burial.