CBSE  /  Class 10  /  Science  /  Sources of Energy

  • 1. 
    Which of the following is a non-renewable source of energy?

  • Wood
  • Sun
  • Fossil fuels
  • Wind

  • 2. 
    Acid rain happens because

  • Sun heats up the upper layer of the atmosphere
  • burning of fossil fuels releases oxides of carbon, nitrogen and sulphur in the atmosphere
  • electrical charges are produced due to friction amongst clouds
  • earth atmosphere contains acids

  • 3. 
    Fuel used in thermal power plants is

  • water
  • uranium
  • biomass
  • fossil fuels

  • 4. 
    In a hydro power plant

  • potential energy possessed by stored water is converted into electricity
  • kinetic energy possessed by stored water is converted into potential energy
  • electricity is extracted from water
  • water is converted into steam to produce electricity

  • 5. 
    Which is the ultimate source of energy?

  • Water
  • Sun
  • Uranium
  • Fossil fuels

  • 6. 
    Which one of the following forms of energy leads to least environmental pollution in the process of its harnessing and utilisation?

  • Nuclear energy
  • Thermal energy
  • Solar energy
  • Geothermal energy

  • 7. 
    Ocean thermal energy is due to

  • energy stored by waves in the ocean
  • temperature difference at different levels in the ocean
  • pressure difference at different levels in the ocean
  • tides arising out in the ocean

  • 8. 
    The major problem in harnessing nuclear energy is how to

  • split nuclei
  • sustain the reaction
  • dispose off spent fuel safely
  • convert nuclear energy into electrical energy

  • 9. 
    Which part of the solar cooker is responsible for greenhouse effect?

  • Coating with black colour inside the box
  • Mirror
  • Glass sheet
  • Outer cover of the solar cooker

  • 10. 
    The main constituent of biogas is

  • methane
  • carbon dioxide
  • hydrogen
  • hydrogen sulphide
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