Olympiad – Class X – Science - Phy - Sources of Energy

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Question - 1

At which of the following locations is geothermal energy feasible?

  • A Those that are nearer to the sea
  • B Those that have thermal plants
  • C Those that have coal mines
  • D Those that are above the hot spots in the crust

Question - 2

What does biogas mainly consist of?

  • A CH4 + CO2
  • B C2H6+ CO2
  • C CH4 + N02
  • D C2H2+C2

Question - 3

Which of the following does NOT allow harmful ultraviolet radiations from the sun to reach the earth?

  • A 02
  • B N02
  • C CO2
  • D 03

Question - 4

Identify the fuel that can replace petrol in racing ears.

  • A Ethanol
  • B Hydrogen
  • C Nitrogen
  • D Methanol

Question - 5

What is needed to produce biogas in a biogas plant?

  • A Only oxygen
  • B Only water
  • C Both oxygen and water
  • D Neither oxygen nor water

Question - 6

What is the least speed of wind needed to generate electricity?

  • A 1.5 km h-1
  • B 15 km h-1
  • C 150 km h-1
  • D 1500 km h-1

Question - 7

Which of the following produces heat the most on burning?

  • A Dung cake
  • B Biomass
  • C Biogas
  • D A fuel

Question - 8

Which of the following causes the least pollution when burnt?

  • A Petrol
  • B Diesel
  • C Coal
  • D Natural gas

Question - 9

The main constituent of natural gas is

  • A CH4
  • B C2H6
  • C C3H8
  • D C4H10

Question - 10

What is the percentage of carbon in coke?

  • A 60%
  • B 80%
  • C 90%
  • D 98%