We have compiled the NCERT MCQ Questions for Class 12 Biology Chapter 16 Environmental Issues with Answers Pdf free download covering the entire syllabus. Practice MCQ Questions for Class 12 Biology with Answers on a daily basis and score well in exams. Refer to the Environmental Issues Class 12 MCQs Questions with Answers here along with a detailed explanation.
Environmental Issues Class 12 MCQs Questions with Answers
Multiple Choice Type Questions
Question 1.
The natural aging of the lake is called
(a) Biomagnification
(b) Eutrophication
(c) BOD
(d) None of the above
Answer
Answer: (b) Eutrophication
Question 2.
The Environment Act of Government of India was passed in
(a) 1976
(b) 1966
(c) 1986
(d) 1996
Answer
Answer: (c) 1986
Question 3.
The agents that bring undesirable changes in the environment arc called
(a) Pollution
(b) Fragments.
(c) Pollutants
(d) None of the above
Answer
Answer: (c) Pollutants
Question 4.
Particulate matter can be removed by,
(a) Catalytic converter
(b) Converter
(c) Radioactive converter
(d) Electrostatic converter
Answer
Answer: (d) Electrostatic converter
Question 5.
The petrol used in engines filled with catalytic converter should be
(a) Simple petrol
(b) Any type of petrol
(c) Unleaded petrol
(d) None of the above
Answer
Answer: (c) Unleaded petrol
Question 6.
Which metal inactivates a catalytic converter?
(a) Gold
(b) Iron
(c) Silvers
(d) Lead
Answer
Answer: (d) Lead
Question 7.
Noise is
(a) pleasant sound
(b) desirable level of sound
(c) undesirable high level of sound
(d) None of the above
Answer
Answer: (c) undesirable high level of sound
Question 8.
The Government of India passed the Water Act in
(a) 1954
(b) 1964
(c) 1974
(d) 1984
Answer
Answer: (c) 1974
Question 9.
Presence of large amount of nutrients in water cause excessive growth of
(a) Lotus
(b) Fungal bloom
(c) Bacterial bloom
(d) Algal bloom
Answer
Answer: (d) Algal bloom
Question 10.
The world’s most problematic aquatic weed is also called
(a) Terror of delhi
(b) Terror of Mumbai
(c) Terror of Bangalore
(d) Terror of Bengal
Answer
Answer: (d) Terror of Bengal
Question 11.
DDT can cause
(a) eutrophication in aquatic plants
(b) biomagnification in aquatic plants
(c) cultural eutrophication in aquatic plants
(d) None of the Above
Answer
Answer: (b) biomagnification in aquatic plants
Question 12.
Sanitary landfill were adopted as the substitute for
(a) Sewage
(b) Biomagnification
(c) Eutrophication
(d) Open-burning dumps
Answer
Answer: (d) Open-burning dumps
Question 13.
The powder of recycled modified plastic is called
(a) Polythene
(b) polyblend
(c) Polyster
(d) None of the above
Answer
Answer: (b) polyblend
Question 14.
E-wastes are referred to
(a) radioactive waste
(b) Nuclear waste
(c) Can be both (a) and (b)
(d) Electronic waste
Answer
Answer: (d) Electronic waste
Question 15.
The greenhouse gases are
(a) Hydrogen and Oxygen
(b) Oxygen and nitrogen
(c) Helium and argon
(d) Carbondioxide and methane
Answer
Answer: (d) Carbondioxide and methane
Question 16.
The present average temperature of earth is
(a) 10°C
(b) 12°C
(c) 14°C
(d) 15°C
Answer
Answer: (d) 15°C
Fill in the Blanks
Question 1.
Agents that bring about an undesirable change in the environment are called …………………..
Answer
Answer: pollutants
Question 2.
The Environment Act was passed in …………………..
Answer
Answer: 1986
Question 3.
Particulate matter can be removed by …………………..
Answer
Answer: electrostatic precipitator
Question 4.
The Air Act was passed in …………………..
Answer
Answer: 1981
Question 5.
………………….. is undesirable high level of sound.
Answer
Answer: Noise
Question 6.
The amount of organic matter in sewage water can be estimated by …………………
Answer
Answer: BOD
Question 7.
Planktonic algae refers to …………………..
Answer
Answer: algal bloom
Question 8.
The Water Act was passed in …………………..
Answer
Answer: 1974
Question 9.
The natural aging of a lake is called …………………..
Answer
Answer: Natural eutrophication
Question 10.
………………….. waste refers to everything that goes out in trash.
Answer
Answer: Solid
Write True or False
Question 1.
The natural aging of a lake is called biomagnification.
Answer
Answer: False
Question 2.
Free-floating algal are called algal bloom.
Answer
Answer: True
Question 3.
The Environment Act was passed in 1984.
Answer
Answer: False
Question 4.
The particulate matter can be removed by catalytic – convertor.
Answer
Answer: False
Question 5.
The undesirable change in the abiotic compounds of the body is called pollutants.
Answer
Answer: False
Question 6.
All the buses in Delhi run on CNG.
Answer
Answer: True
Question 7.
Noise is undesirable low level of sound.
Answer
Answer: False
Question 8.
The Water Act was passed in 1974.
Answer
Answer: True
Question 9.
Solid waste refer to anything that goes out in trash.
Answer
Answer: True
Question 10.
E-wastes refers to radioactive waste.
Answer
Answer: False
One Word Questions
Question 1.
What is the natural aging of a lake called?
Answer
Answer: Eutrophication.
Question 2.
What is increase in concentration of the toxicant of successive trophic levels called?
Answer
Answer: Biomagnification.
Question 3.
In which year was the Water Act passed?
Answer
Answer: 1974.
Question 4.
What are the agents which bring about undesirable changes in the environment called?
Answer
Answer: Pollutants.
Question 5.
In which year was the Environment Act passed?
Answer
Answer: 1986.
Question 6.
What is the fine powder of recycled modified plastic called?
Answer
Answer: Polyblend.
Question 7.
Name the pollutant that has degraded the ozone layer.
Answer
Answer: CFCs.
Question 8.
Name one greenhouse gas.
Answer
Answer: Methane.
Question 9.
In which year was the Montreal Protocol signed?
Answer
Answer: 1987.
Question 10.
What is the process of restoring a forest called?
Answer
Answer: Reforestation.
Match the Following
| Column I | Column II |
| 1. Water Act | A. Biomagnification |
| 2. Air Act | B. Electronic waste |
| 3. DDT | C. Greenhouse gas |
| 4. E-waste | D. 1981 |
| 5. Carbon dioxide | E. 1974 |
Answer
Answer:
| Column I | Column II |
| 1. Water Act | E. 1974 |
| 2. Air Act | D. 1981 |
| 3. DDT | A. Biomagnification |
| 4. E-waste | B. Electronic waste |
| 5. Carbon dioxide | C. Greenhouse gas |
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