Chapter 14. Sources of Energy

Class 10 Science Chapter 14 Sources of Energy Multiple Choice Questions and Answers :

Question :  Which of the following is not a conventional source of energy ? [SEBA 2016]

(a) Fossil fuels 

(b) Bio-Mass  

(c) Nuclear energy 

(d) Wind energy

Answer : (c) Nuclear energy

[ Nuclear energy is not a conventional source of energy. ]

Question :  Which of the following in not a renewable source of energy ? [SEBA 2017]

(a) Sun

(b) wind

(c) fossil fuel

(d) water

Answer : (c) fossil fuel .

Question :  Which of the following is not derived from energy of the sun ?[SEBA 2018]

(a) Biomass  

(b) Nuclear energy 

(c) Geothermal energy 

(d) Wind energy

Answer : (b) Nuclear energy

[ Nuclear energy is not derived from the energy of the sun. ]

Question :  Which one of the following is an example of non-conventional source of energy ? [SEBA 2021]

(a) Fossil fuels   

(b) Thermal power plants

(c) Hydropower plants 

(d) Solar energy

Answer : (d) Solar energy

[ Solar energy is an example of a non-conventional source of energy. ]

Question :  Which of the following is a conventional source of energy ? [SEBA 2023]

(a) Wind energy  

(b) Nuclear energy 

(c) Geo-thermal energy 

(d) Wave energy

Answer : (b) Nuclear energy

[ Nuclear energy is considered a conventional source of energy. ]

Question :  Which of the following is a non-renewable source of energy?

(a) Wood

(b) Sun

(c) Fossil fuels

(d) Wind

Answer : (c) Fossil fuels

Question :  Acid rain happens because

(a) sun leads to heating of upper layer of atmosphere

(b) burning of fossil fuels release oxides of carbon, nitrogen and sulphur in the atmosphere

(c) electrical charges are produced due to friction amongst clouds

(d) earth atmosphere contains acids

Answer : (b) Burning of fossil fuels releases oxides of carbon, nitrogen, and sulfur into the atmosphere.

Question :  Fuel used in thermal power plants is

(a) water

(b) uranium

(c) biomass

(d) fossil fuels

Answer : (d) Fossil fuels

Question :  In a hydro power plant

(a) Potential energy possessed by stored water is converted into electricity

(b) Kinetic energy possessed by stored water is converted into potential energy

(c) Electricity is extracted from water

(d) Water is converted into steam to produce electricity

Answer : (a) Potential energy possessed by stored water is converted into electricity .

Question :  Which is the ultimate source of energy?

(a) Water

(b) Sun

(c) Uranium

(d) Fossil fuels

Answer : (b) Sun

Question :  Which one of the following forms of energy leads to least environmental pollution in the process of its harnessing and utilisation?

(a) Nuclear energy

(b) Thermal energy

(c) Solar energy

(d) Geothermal energy

Answer : (c) Solar energy

Question :  Ocean thermal energy is due to

(a) energy stored by waves in the ocean

(b) temperature difference at different levels in the ocean

(c) pressure difference at different levels in the ocean

(d) tides arising out in the ocean

Answer : (b) Temperature difference at different levels in the ocean

Question :  The major problem in harnessing nuclear energy is how to

(a) split nuclei?

(b) sustain the reaction?

(c) dispose off spent fuel safely?

(d) convert nuclear energy into electrical energy?

Answer : (c) Dispose of spent fuel safely ?

Question :  Which part of the solar cooker is responsible for green house effect?

(a) Coating with black colour inside the box

(b) Mirror

(c) Glass sheet

(d) Outer cover of the solar cooker

Answer : (c) Glass sheet

Question :  The main constituent of biogas is

(a) methane

(b) carbon dioxide

(c) hydrogen

(d) hydrogen sulphide

Answer : (a) methane ()

Question :  The power generated in a windmill

(a) is more in rainy season since damp air would mean more air mass hitting the blades

(b) depends on the height of the tower

(c) depends on wind velocity

(d) can be increased by planting tall trees close to the tower

Answer : (c) depends on wind velocity .

[ The power generated in a windmill depends on wind velocity. Higher wind speeds result in increased kinetic energy, translating to more power generation in the windmill.]

Question :  Choose the correct statement

(a) Sun can be taken as an inexhaustible source of energy

(b) There is infinite storage of fossil fuel inside the earth

(c) Hydro and wind energy plants are non polluting sources of energy

(d) Waste from a nuclear power plant can be easily disposed off

Answer : (a) Sun can be taken as an inexhaustible source of energy .

Question :  In a hydroelectric power plant more electrical power can be generated if water falls from a greater height because

(a) its temperature increases

(b) larger amount of potential energy is converted into kinetic energy

(c) the electricity content of water increases with height

(d) more water molecules dissociate into ions

Answer : (b) A larger amount of potential energy is converted into kinetic energy.

Question :  Choose the incorrect statement regarding wind power

(a) It is expected to harness wind power to minimum in open space

(b) The potential energy content of wind blowing at high altitudes is the source of wind power

(c) Wind hitting at the blades of a windmill causes them to rotate.The rotation thus achieved can be utilised further

(d) One possible method of utilising the energy of rotational motion of the blades of a windmill is to run the turbine of an electric generator

Answer : (b) The potential energy content of wind blowing at high altitudes is the source of wind power.

Question :  Choose the incorrect statement

(a) We are encouraged to plant more trees so as to ensure clean environment and also provide bio-mass fuel

(b) Gobar-gas is produced when crops, vegetable wastes etc., decompose in the absence of oxygen

(c) The main ingredient of bio-gas is ethane and it gives a lot of smoke and also produces a lot of residual ash

(d) Bio-mass is a renewable source of energy.

Answer : (c) The main ingredient of bio-gas is ethane, and it gives a lot of smoke and also produces a lot of residual ash.