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
A number of peoples are suffering from respiratory disease due to
  • A
    Air pollution
    Correct
  • B
    Noise pollution
  • C
    Water pollution
  • D
    Soil pollution
2
The water that is purified and fit for drinking is called
  • A
    Saline water
  • B
    Portable water
    Correct
  • C
    Drinking water
  • D
    Pure water
3
Finer hair inside the nose
  • A
    Prevent the carbon dioxide gas
  • B
    Filter the microbes
  • C
    Prevent the water vapour
  • D
    Filter the dust particle
    Correct
4
Addition of harmful substance in water leads to
  • A
    Algal bloom
  • B
    High oxygen demand
  • C
    Microbial growth
  • D
    Water pollution
    Correct
5
We cannot survive a few minutes without
  • A
    Air
    Correct
  • B
    Medicine
  • C
    Water
  • D
    Food
6
People living near sea or ocean also feels lacks of water because
  • A
    Sea water is banned by government
  • B
    Sea water is not reachable
  • C
    All of these
  • D
    Sea water is salty
    Correct
7
There is acute shortage of water due to
  • A
    Pollution of rivers
  • B
    Growing population and overuse
    Correct
  • C
    Lack of technique to purify water
  • D
    Melting of ice at poles
8
Sea water is unfit for drinking because it contain
  • A
    Dissolved organic matter
  • B
    Dead plants and animals
  • C
    Rain water
  • D
    Large amount of salt
    Correct
9
Water can be conserved by
  • A
    Purification
  • B
    Filtration
  • C
    Water cycle
  • D
    Rain water harvesting
    Correct
10
Last stage in treatment of sewage is
  • A
    Aeration
  • B
    Chlorination
    Correct
  • C
    Sterilization
  • D
    Evaporate
11
Presence of soluble salts in sea water makes it
  • A
    All of these
  • B
    Saline
    Correct
  • C
    Polluted
  • D
    Foul smelling
12
Water is the most common __________.
  • A
    Solution
  • B
    Suspension
  • C
    Solvent
    Correct
  • D
    Solute
13
Algal bloom is caused due to
  • A
    Presence of inorganic matter in water
  • B
    Absence of carbon dioxide in water
  • C
    Presence of dissolved salt
  • D
    Presence of organic matter in water
    Correct
14
Gases and fine dust particle together make the
  • A
    Carbon monoxide
  • B
    Water vapour
  • C
    Carbon dioxide
  • D
    Smoke
    Correct
15
Most of rivers in India are polluted due to
  • A
    Addition of untreated sewage
    Correct
  • B
    Absence of oxygen
  • C
    Presence of fish and frog
  • D
    Addition of organic wastes