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

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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