HomeLearn Fast select Course
Change UnitChange SubjectLast Menu
ICSE-IX-Geography

17: Sources of Pollution

with Solutions -

Note: Please signup/signin free to get personalized experience.

Note: Please signup/signin free to get personalized experience.

10 minutes can boost your percentage by 10%

Note: Please signup/signin free to get personalized experience.

  
  • #
  • #
    Section : I
    Short Answer Questions
  • Qstn #1
    Name any three air pollutants and the sources of each of them.
    Ans : Air Pollutant:
    1. Carbon Monoxide (CO)
    2. Nitrogen Oxides (NOx)
    3. Sulphur Oxides (SOx)

    Sources of air pollutant:
    1. Gasoline fuel, motor vehicles fuel, burning of wood and coal, solid waste disposal, Industrial processes.
    2. Primary sources are motor vehicles and power generation stations, combustion of organic matters, furnace stacks, incinerators.
    3. Mainly due to burning of coal, smelting operations, refineries, chemical plants, open burning of garbage and municipal incinerators.
  • Qstn #2
    What are natural sources of air pollution ?
    Ans : Natural sources are volcanic eruptions, sand, dust, forest fires etc.
  • Qstn #3
    Name one industry which pollutes the atmosphere with gaseous as well as with particulate matter.
    Ans : Automobile industry.
  • Qstn #4
    What is known as smog ? What harm is done by smog especially in winter ?
    Ans : Smog means smoke + fog. In winter season smog is responsible for many accidents due to the obstacle in visibility.
  • Qstn #5
    Name three gases emitted during burning of garbage.
    Ans : These are Carbon dioxide, Sulphur dioxide, Nitrogen oxides.
  • Qstn #6
    Mention any two sources of water pollution.
    Ans : Two sources of water pollution are :
    • household detergents and sewage,
    • oil spills
  • Qstn #7
    Name two heavy metals from industries that pollute water.
    Ans : Heavy metals are Lead and Mercury.
  • Qstn #8
    Mention any four sources of soil pollution.
    Ans : These are industrial wastes, domestic waste, chemical fertilizers and pesticides.
  • Qstn #9
    Why are radioactive pollutants very dangerous ?
    Ans : The emission of radioactive minerals Uranium 235 Plutonium 239, make the whole surroundings radioactive after fission and carried away by wind to long distances. These are dangerous to health, as these remain as it is for a long time.
  • Qstn #10
    What kind of solid and liquid pollutants does the offshore drilling produce ?
    Ans : Drilling produces dust, stones etc. and crude oil spills pollute largely the oceanic water and disturb marine life.
  • Qstn #11
    What are primary pollutants ?
    Ans : The pollutants that are directly emitted from the sources and are found in the atmosphere in the form in which they are emitted are known as primary pollutants, e.g., ash, radioactive compounds, oxides of sulphur and nitrogen etc.
  • Qstn #12
    With an example, state what are secondary pollutants?
    Ans : The pollutants that are formed in the atmosphere by chemical interactions between primary pollutants and atmospheric constituents are known as secondary pollutants. Examples of secondary pollutants are Sulphur trioxide, Ozone, Peroxyacetyl Nitrate (PAN), Ketones etc.
  • Qstn #13
    What is the connection between urbanisation and air pollution ?
    Ans : The major connection between urbanisation and air pollution are automobiles, industries, burning of garbage and brick kilns. These sources release pollutants such as oxides of carbon, oxides of sulphur, oxides of nitrogen, and hydrocarbons, ozone, chlorofluoromethanes, etc.
next page