MCQ Questions for Class 10 Science Chapter 14 Sources of Energy with Answers

Sources of Energy Class 10 MCQs Questions with Answers

Question 1.
Which of the following is a non-renewable source of energy?
(a) Wood
(b) Sun
(c) Fossil fuels
(d) Wind
Answer:
(c) Fossil fuels

Explanation: Non-renewable sources are those sources that are present in a limited amount and once finished cannot be renewed again for millions of years.

Wood comes from trees, so it is a renewable source of energy. The Sun and wind are also renewable sources of energy but fossil fuels are non-renewable (conventional sources). Once they are used up, they can’t be renewed again, so we need to conserve them.

Question 2.
In a hydropower plant:
(a) the potential energy possessed by stored water is converted into electricity
(b) the 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:

Question 3.
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 in the ocean
Answer:

Question 4.
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:

Question 5.
Which part of the solar cooker is responsible for the greenhouse effect?
(a) Coating with black coLour inside the box
(b) Mirror
(c) Glass sheet
(d) Outer cover of the solar cooker
Answer:
(c) Gloss sheet

Explanation: Sotar cookers are covered with a glass plate which traps infrared radiations (heat) from sunlight and does not allow them to escape. In other words, we can say that it provides a greenhouse effect. Solar cookers achieve a higher temperature by using mirrors to focus the rays of the Sun.

Related Theory

The trapping of heat in the environment due to the presence of greenhouse gases like CO₂, methane, water vapour etc. causes the greenhouse effect. This raises the temperature of Earth.

Question 6.
The main constituent of biogas is:
(a) methane
(b) carbon dioxide
(c) hydrogen
(d) hydrogen sulfide
Answer:
(a) methane

Explanation: Biogas is an excellent fuel as it contains up to 75% methane. It burns without smoke, leaves no residue like ash in wood. charcoal and coal burning. Its heating capacity is high. It is also used for lighting.

Question 7.
The power generated in a windmill:
(a) is more in the 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:

Question 8.
Choose the correct statement:
(a) The Sun can be taken as an inexhaustible source of energy
(b) There is infinite storage of fossil fuel inside 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:

Question 9.
In a hydroelectric power plant, more electrical power can be generated if waterfalls 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:

Question 10.
The biggest source of energy on Earth’s surface is:
(A) Biomass
(B) Solar radiations
(C) Tides
(D) Winds
Answer:

Question 11.
Which is the type of system where the energy is harnessed by the heat accumulated on the surface of the water?
(a) Wind energy
(b) Wave energy
(c) Ocean thermal energy conversion
(d) Solar energy
Answer:
(c) Ocean thermal energy conversion

Explanation: Absorption of heat from the sun by the seas and oceans, solar radiation causes ocean currents and moderate temperature gradients from the water surface downward especially in tropical waters.

Question 12.
The correct energy conversion taking place in a hydroelectric power plant is:
(a) Potential energy of water → Kinetic Energy of turbine → Electrical energy
(b) Potential energy of turbine → Kinetic Energy of water → Electrical energy
(c) Heat energy of water → Kinetic Energy of turbine → Electrical energy
(d) Potential energy of water → Heat Energy → Electrical energy
Answer:

Question 13.
Which of the following are non-conventional sources of energy:
(I) Wind energy
(II) Water
(III) Solar energy
(IV) Geothermal energy
(a) Both (I) and (II)
(b) Both (II) and (III)
(c) Both (III) and (IV)
(d) Both (II) and (IV)
Answer:

Question 14.
Approximately what percentage of energy requirement in India is met by hydropower plants?
(a) 10 %
(b) 25 %
(c) 50 %
(d) 75 %
Answer:
(b) 25 %

Explanation: A quarter or 25 % of the energy requirement in India is met by hydropower plants. But we are still largely dependent upon coal and petroleum for meeting our energy requirements.

Question 15.
The table below lists the sources of energy and whether they are exhaustible or non-exhaustible. Select the row containing incorrect information:

Question 16.
Two fuels obtained from biomass are:
(a) Coal and biogas
(b) Petroleum and natural gas
(c) Charcoal and biogas
(d) Charcoal and natural gas
Answer:
(c) Charcoal and biogas

Explanation: When wood is burnt in a limited supply of oxygen, water and volatile materials present in it get removed and charcoal is left behind as the residue. Charcoal burns without flames is comparatively smokeless and has a higher heat generation efficiency. Similarly, cow-dung, various plant materials like the residue after harvesting the crops, vegetable waste and sewage are decomposed in the absence of oxygen to give biogas.

Assertion Reasoning questions Class 10 Science Chapter 14

For the following questions, two statements are given one labeled Assertion (A) and the Other labeled Reason (R). Select the correct answer to these questions from the codes (a), (b), (c) and (d) as given below:
(a) Both (A) and (R) are true and (R) is the correct explanation of the assertion.
(b) Both (A) and (R) are true, but (R) is not the correct explanation of the assertion.
(c) (A) is true, but (R) is false.
(d) (A) is false, but (R) is true.

Question 17.
Assertion (A): In a wind energy farm, a number of windmills are erected over a large area.
Reason (R): The output of a single windmill is quite small and cannot be used for commercial purposes.
Answer:
(a) Both (A) and (R) are true and (R) is the correct explanation of the assertion.

Question 18.
Assertion (A): All exhaustible sources of energy are non-renewable.
Reason (R): Energy sources that cannot be regenerated are called renewable sources of energy.
Answer:

MCQ Questions for Class 10 Science with Answers