Class 8 Pollution Of Air And Water CBSE Questions & Answers

Class 8 · Pollution Of Air And Water

This is Science Class 8 Pollution of Air and Water CBSE Questions & Answers. There are 15 questions in this test with each question having around four answer choices.

Questions & Answers

1
In winter, smoke and fog together mix to form
  • A
    Smog
    Correct
  • B
    Ozone
  • C
    Clouds
  • D
    Water vapour
2
Gaseous pollutant like Sulpher dioxide and nitrogen oxide is mainly released from
  • A
    Service sector
  • B
    Paper industry
  • C
    Petroleum refinery
    Correct
  • D
    Cotton industry
3
Presence of SO2 and NO2 in air cause _____________ during raining.
  • A
    Acid rain
    Correct
  • B
    Cloud burst
  • C
    Heavy rain
  • D
    Respiratory problem
4
Which of the following gas is responsible for ozone layer depletion?
  • A
    Sulpher dioxide gas
  • B
    Argon gas
  • C
    Carbon dioxide gas
  • D
    Chlorofluorocarbon gas
    Correct
5
One layer protect us from harmful
  • A
    Visible rays
  • B
    Infrared rays
  • C
    Ultraviolet rays
    Correct
  • D
    Violet ray
6
Chlorofluorocarbon gas was used in
  • A
    Refrigerator and air conditioners
    Correct
  • B
    Rail engine
  • C
    All of these
  • D
    Bus and cars
7
Mathura oil refinery and leather industry around Agra are mainly responsible for
  • A
    Pollution in Delhi
  • B
    Acid rain on Taj Mahal
    Correct
  • C
    Acid rain in Delhi
  • D
    Skin disease
8
Sulpher dioxide combine with water to form
  • A
    Hydrochloric acid
  • B
    Acetic acid
  • C
    Nitric acid
  • D
    Sulphuric acid
    Correct
9
CNG is called clean fuel because
  • A
    Incomplete combustion takes place
  • B
    Combustion of it produce less Carbon dioxide
    Correct
  • C
    Only carbon monoxide is produced
  • D
    Combustion do not produce Carbon dioxide
10
We cannot survive a few minutes without
  • A
    Food
  • B
    Air
    Correct
  • C
    Water
  • D
    Medicine
11
Green house effect is responsible for
  • A
    Global warming
    Correct
  • B
    Acid rain
  • C
    Drought
  • D
    Air pollution
12
In which process of plant carbon dioxide is converted into oxygen?
  • A
    Respiration
  • B
    Transpiration
  • C
    Transportation
  • D
    Photosynthesis
    Correct
13
The average temperature of earth is increasing slowly due to
  • A
    Global warming
    Correct
  • B
    Increasing plants
  • C
    Absence of microbes
  • D
    Increasing population
14
Which of the following is most polluted stretch of river Ganga?
  • A
    Haridwar in Uttrakhand
  • B
    Patna in Bihar
  • C
    Hubli in W.B
  • D
    Kanpur in U.P
    Correct
15
Kyoto protocol is about the
  • A
    Reduction in emission of green house gas
    Correct
  • B
    Prevention of ozone layer
  • C
    Population control
  • D
    Increase in emission of green house gas