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
Open drain cause ____________ condition.
  • A
    Hygienic
  • B
    Unhygienic
    Correct
  • C
    Humid
  • D
    Temperate
2
Which of the following substance is present in least amount in air
  • A
    Oxygen
  • B
    Nitrogen
  • C
    Carbon dioxide
  • D
    Helium
    Correct
3
The components of air which are harmful to living beings are
  • A
    Nitrogen and carbon dioxide
  • B
    Dust and smoke
    Correct
  • C
    Dust and water vapour
  • D
    Smoke and water vapour
4
Jaundice affects which organ?
  • A
    Kidney
  • B
    Liver
    Correct
  • C
    Lung
  • D
    Heart
5
Which of the following do not act as air pollutant?
  • A
    Burning of fossil fuels
  • B
    Using electric heater
    Correct
  • C
    Forest fire
  • D
    Volcanic eruption
6
Which of the following is present in polluted air
  • A
    Carbon dioxide and oxygen
  • B
    Poisonous gas and dust particles
    Correct
  • C
    Oxygen and nitrogen
  • D
    Water vapour and dust particles
7
Solid parts of sewage can be used as
  • A
    Pesticides
  • B
    Manure
    Correct
  • C
    Insecticides
  • D
    Fertilizers
8
Which of the following is not a pollutant of air?
  • A
    Hydrogen oxide
    Correct
  • B
    Nitrogen oxide
  • C
    Carbon dioxide
  • D
    Sulpher dioxide
9
Air is a mixture of
  • A
    Hydrogen and hydrogen
  • B
    Carbon dioxide and oxygen
  • C
    Many gases
    Correct
  • D
    Oxygen and nitrogen
10
Disease causing micro-organisms are called
  • A
    Microbes
  • B
    Bacteria
  • C
    Fungi
  • D
    Pathogen
    Correct
11
We feel suffocation in a room having burning substance is due to
  • A
    Accumulation of carbon monoxide
    Correct
  • B
    Absence of carbon dioxide
  • C
    Accumulation of nitrogen
  • D
    Accumulation of oxygen
12
Drainage system failure in a cities may cause
  • A
    Hygienic condition
  • B
    Shortage of water
  • C
    Epidemic
  • D
    Water logging on street
    Correct
13
Which of the following is a green house gas?
  • A
    Carbon monoxide
  • B
    Methyl alcohol
  • C
    Hydrogen sulphide
  • D
    Carbon dioxide
    Correct
14
WWTP stands for
  • A
    Waste water treatment plant
    Correct
  • B
    Water weathering treatment plant
  • C
    Waste water treatment plant
  • D
    Waste water transaction plant
15
Sewer system is useful in
  • A
    Rainy season only
  • B
    All seasons
    Correct
  • C
    Summer season only
  • D
    Winter season only