Pollution of Air and Water Class 8 MCQ Questions

MCQ on Pollution of Air and Water Class 8

Choose the correct answer :

Question 1.
…………………… combines with water to form acid rain.
A) Sulphur dioxide
B) Calcium hydroxide
C) Phosphorous monoxide
D) Carbon monoxide
Answer:
A) Sulphur dioxide

Question 2.
Identify the renewable energy resource ……………………
A) Coal
B) Petrol
C) Diesel
D) Solar energy
Answer:
D) Solar energy

Question 3.
Which of the following is responsible for global warming ?
A) O₂
B) NO₂
C) PO₂
D) CO₂
Answer:
D) CO₂

Question 4.
If you take print on both sides of the white paper, this resembles ……………….
A) Recycle
B) Reuse
C) Recover
D) Reduce
Answer:
D) Reduce

Question 5.
The most polluted city in India
A) Mumbai
B) Hyderabad
C) Bengaluru
D) New Delhi
Answer:
D) New Delhi

Question 6.
The % of oxygen in the atmosphere is
A) 13 %
B) 0. 03 %
C) 78 %
D) 21%
Answer:
D) 21%

Question 7.
This gas protects us from U.V rays of the sun ?
A) Ozone
B) Nitrogen
C) Oxygen
D) Ammonia
Answer:
A) Ozone

Question 8.
The Taj Mahal is located in
A) Delhi
B) Agra
C) Hyderabad
D) Bangaluru
Answer:
B) Agra

Question 9.
Source of CFC is …………….
A) A/C
B) Refrigerator
C) Jet planes
D) All the above
Answer:
D) All the above

Question 10.
“Vanamahotsav” is generally organised in the month of ……………….
A) April
B) May
C) October
D) July
Answer:
D) July

Question 11.
Identify the ecofriendly fuel.
A) CNG
B) LPG
C) Electric battery
D) All the above
Answer:
D) All the above

Question 12.
The enhanced growth of algal blooms in water bodies is due to the presence of ……………..
A) Nitrates and Phosphates
B) Pesticides
C) Chemicals
D) DDT
Answer:
A) Nitrates and Phosphates

Question 13.
Ozone layer is destroyed by
A) NO₂
B) SO₂
C) CO₂
D) CFCs
Answer:
D) CFCs

Question 14.
Acid rain is due to ………………
A) SO₂
B) NO₂
C) CO₂
D) A and B
Answer:
D) A and B

Question 15.
“Marble Cancer” is due to ………………….
A) Global warming
B) Green house effect
C) Acid rains
D) Water pollution
Answer:
C) Acid rains

Question 16.
Which of the following is responsible for yellowing of the Taj Mahal ……………….
A) Leather factories of Agra
B) Textile industries of Agra
C) Tanning industries of Kanpur
D) Mathura oil refinery
Answer:
D) Mathura oil refinery

Question 17.
Example for SPM is ……………….
A) Soot particles
B) Pollen grains
C) Dust particles
D) All the above
Answer:
D) All the above

Question 18.
The oxygen carrying capacity of blood is reduced by ………………….
A) CO₂
B) CO₂
C) NO₂
D) SO₂
Answer:
B) CO₂

Question 19.
Identify the poisonous gas ……………..
A) CO₂
B) N₂
C) O₂
D) CO
Answer:
D) CO

Question 20.
Which of the following is a green house gas
A) CO₂
B) SO₂
C) Methane
D) All the above
Answer:
D) All the above

Question 21.
Ganga Action plan was implemented in
A) 1984
B) 1985
C) 1986
D) 1990
Answer:
B) 1985

Question 22.
National Mission for Clean Ganga was initiated in the year ……………….
A) 2012
B) 2013
C) 2016
D) 2020
Answer:
C) 2016

Question 23.
River Ganga is considered as dead river in the region of ……………….
A) Varanasi
B) Allahabad
C) Kanpur
D) Lucknow
Answer:
C) Kanpur

Question 24.
Toxicity in plants and animals is due to ……………….
A) Arsenic
B) Lead
C) Fluorides
D) All the above
Answer:
D) All the above

Question 25.
This is the indicator of water quality
A) colour
B) dissolved oxygen
C) bacteria present in the faeces of mammals
D) All the above
Answer:
D) All the above

Question 26.
Which chemical is used to purify the drinking water ?
A) Chlorine tablets
B) Bleaching Powder
C) Sodium bi carbonate
D) A and B
Answer:
D) A and B

Question 27.
Best method of purification of water in our house hold is ……………….
A) filteration
B) chlorination
C) boiling
D) None
Answer:
C) boiling

Question 28.
What are the 3’Rs involved in Conservation of water ………………
A) Reduce
B) Reuse
C) Recycle
D) All the above
Answer:
D) All the above

Question 29.
Identify the water pollutant
A) Garbage
B) Sewage
C) Dead bodies
D) All the above
Answer:
D) All the above

Question 30.
This plan is aimed to reduce the pollution levels in the river Ganga is
A) Ganga Action Plan
B) National Mission for Clean Ganga
C) Namo Ganga
D) A and B
Answer:
D) A and B

Question 31.
Global warming results in …………………
A) Melting of glaciers
B) Change in rain fall patterns
C) Reduced crop production
D) All the above
Answer:
D) All the above

Question 32.
Melting of Gangotri glacier is due to
A) Green house effect
B) Global warming
C) Acid rains
D) CFCs
Answer:
B) Global warming

Question 33.

This is a source of ……………….
A) Water pollution
B) Air pollution
C) Noise pollution
D) None
Answer:
B) Air pollution

Question 34.

Observe the above picture. The reason for the smoke is …………………..
A) burning of fossil fuels
B) greenhouse effect
C) global warming
D) None of the above
Answer:
A) burning of fossil fuels

Question 35.
This beautiful monument was suffering from

A) low tourist visits
B) loss in structural stability
C) floods of river Yamuna
D) Marble cancer
Answer:
D) Marble cancer

Question 36.

The above picture indicates that
A) The water body was discharged by industrial wastes
B) favours aquatic life
C) full of potable water
D) None of the above
Answer:
A) The water body was discharged by industrial wastes

Question 37.
……………… % of the world’s population is without safe drinking water.
A) 25
B) 30
C) 35
D) 40
Answer:
A) 25

Question 38.
CNG is used as fuel in all the buses in
A) Mumbai
B) Delhi
C) Kolkata
D) Chennai
Answer:
B) Delhi

Question 39.
Which of the following was ordered by Supreme Court to save the Taj from pollution ?
A) switch to cleaner fuels
B) use unleaded petrol
C) stop pollutants from Mathura Refinery
D) all the above
Answer:
D) all the above

Question 40.
Affects of Suspended Particulate Matter is
A) Reduce visibility
B) Respiratory problems
C) Damage buildings
D) All the above
Answer:
D) All the above

Question 41.
Which of the following is not a greenhouse gas ?
A) Carbon dioxide
B) Sulphur dioxide
C) Nitrogen
D) Methane
Answer:
C) Nitrogen

Question 42.
See the map below showing the position of two factories and a village. People in the village suspect that one or both of the factories are polluting the river from which they use the water for their daily needs. However, the factories claim that the river is already polluted before it reaches them and they are not responsible for the pollution. (Note the directions of the river’s flow.)

Which is the MINIMUM number of points at which samples of watei1 should be taken to identify which factory is polluting ?
A) All five points 1, 2, 3, 4 and 5
B) Four points 1, 2, 3 and 4
C) Four points 1, 2, 4 and 5
D) Three points 2, 4, and 5
Answer:
B) Four points 1, 2, 3 and 4
8th Class Biology Bit Bank