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
Which component of air is used for fire extinguishers?
  • A
    Nitrogen
  • B
    Carbon dioxide gas
    Correct
  • C
    Oxygen
  • D
    Hydrogen
2
Which is not produced by burning of fossils fuel?
  • A
    Nitrogen oxide
  • B
    Sulpher dioxide
  • C
    Oxygen
    Correct
  • D
    Carbon dioxide
3
Which of these diseases may happen due to drinking of contaminated water?
  • A
    Malaria
  • B
    Cholera
    Correct
  • C
    Pneumonia
  • D
    Small pox
4
In cities, water supply is through
  • A
    Storage tanks
  • B
    Tankers only
  • C
    Networks of pipes
    Correct
  • D
    Series of wells
5
Global warming is caused due to increased level of
  • A
    Green house gases
    Correct
  • B
    Methyl oxide
  • C
    Acidic gases
  • D
    Chlorofluorocarbon
6
Soap do not form foam with
  • A
    Hard water
    Correct
  • B
    Pond water
  • C
    Cold water
  • D
    Hot water
7
Which one is the most common cause of contamination of water in rural area?
  • A
    Soil present around the water bodies
  • B
    Defection in or around water bodies
    Correct
  • C
    Presence of aquatic organisms
  • D
    Addition of manure in field near water bodies
8
Which of the following disease is caused by ultraviolet rays?
  • A
    Diabetes
  • B
    Skin cancer
    Correct
  • C
    Pneumonia
  • D
    Blood cancer
9
River water is unfit for drinking because it has
  • A
    Suspended impurities and pollutants
    Correct
  • B
    All of these
  • C
    Aquatic organism
  • D
    More salts than required
10
Finer hair inside the nose
  • A
    Prevent the water vapour
  • B
    Prevent the carbon dioxide gas
  • C
    Filter the microbes
  • D
    Filter the dust particle
    Correct
11
Agricultural chemical includes
  • A
    Polluted water and irrigation water
  • B
    Fertilizers and pesticides
    Correct
  • C
    Manure and plant wastes
  • D
    Human and animal excreta
12
Water management is the process of
  • A
    Purification of water
  • B
    Equitable distribution of water
  • C
    Water cycling
  • D
    Judicious and careful use of water
    Correct
13
Pollution is affecting the
  • A
    Quality of our daily life
    Correct
  • B
    Quality of aquatic life only
  • C
    Quantity of animals life
  • D
    Vegetation and microbes life
14
Accumulation of harmful non-biodegradable chemicals in food chain is called
  • A
    Biomagnifications
    Correct
  • B
    Expedition
  • C
    Fertilization
  • D
    Bio-fertilization
15
Sewage treatment plants removes
  • A
    Only chemical wastes
  • B
    Solid, liquid and chemical wastes
    Correct
  • C
    Only solid wastes
  • D
    Only liquid wastes