Class X

Which of the following is a component of bio-gas?
  1. Methane
  2. LPG
  3. CNG
  4. Hydrogen sulphide
Which of the following produces energy because of temperature difference at various levels in ocean
  1. Tidal energy
  2. Wave energy
  3. Solar energy
  4. Ocean thermal energy
Which method is used to produce electricity in hydroelectric power plant.
  1. By boiling the water to produce steam
  2. By ionizing water
  3. By running dynamo by kinetic energy
  4. All of these
Which energy source is the largest source used in India?
  1. CNG
  2. LPG
  3. Coal
  4. Bio Gas
The power plant which converts potential energy of falling water into electricity is
  1. Nuclear plant
  2. Thermal plant
  3. Hydro power plant
  4. Wind plant
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