Chhattisgarh State Class 10 Science Chapter 18 Solution

Chhattisgarh State Board Class 10 Science Chapter 18 Energy: Forms and Sources Exercise Multiple Choice, Fill in the Blanks, Questions and Answers here.

Chhattisgarh State Class 10 Science Chapter 18 Solution

1) Choose the correct option:

(i) Most of the energy sources used by us utilize solar energy. Which energy source out of following is not derived from solar energy:

(a) Geo thermal energy (b) Wind energy

(c) Nuclear energy (d) Bio mass.

Ans: –  (a) Geo thermal energy.

(ii) Biogas is a mixture of following gases-

(a) Nitrogen, Helium, Hydrogen.

 (b) Oxygen, Nitrogen, Hydrogen

(c) Ethane, Oxygen, Hydrogen.

 (d) Methane, Carbon dioxide, Hydrogen.

Ans: – (d) methane, carbon dioxide, hydrogen.

(iii) Nuclear fission is a reaction in which-

(a) Two light nuclei combine

(b) Breaking of a heavy nucleus into light nuclei.

(c) Both of the above.

 (d) None of the above.

Ans: – (b).

(iv) Fossil fuels are-

(a) Coal, petroleum, natural gas.

(b) Biogas, wave energy, nuclear energy.

(c) Tidal energy, hydel power energy.

(d) Wave energy, ocean thermal energy, geo thermal energy.

Ans: – (a) coal, petroleum, natural gas.

(v) Solar cell is a device which converts-

(a) Electric energy into kinetic energy.

(b) Solar energy into potential energy

(c) Solar energy into electric energy.

 (d) Solar energy into nuclear energy.

Ans: – (c) solar energy into electrical energy.

2) Fill in the blanks-

(i) We cannot use solar heaters on a …cloudy…………………… day to heat water.

(ii) Lighting a torch is conversion of chemical energy into ……light …………… energy.

(iii) The energy generated due to oceans is ………tidal energy…………..

(iv) A solar cooker converts …..light………………. energy into ……… heat………….. energy.

3) Explain the mechanism of solar cooker with the help of a labelleddiagram,

Ans: –

4) Explain why-

(i) The inside of a solar cooker box is painted black.

Ans: –  As we all know that black colour absorbed the light most. So, the solar cooker painted with the black colour because the black colour absorbs the sun light most which produced more heat.

(ii) The solar cooker box is covered with a glass-sheet.

Ans: – The glass is needed in the solar cooker. As we all know that a greenhouse arrange mental ways closed the path of the reflected rays and increase the heat so this time solar cooker is also working as it and restricted the reflection of rays.

(iii) Plane mirror reflectors are used inside the solar cookers.

Ans: – There are more harmful element in radiation of heat in solar radiation. As we all know that the this is important to remove this harmful element present in there, we used the plane mirror as a reflector.

5) Name the device which converts solar energy into electric energy.

Ans: – Photovoltaic cell are uses as to convert the solar energy into electric energy.

6) Apart from cattle-dung, which other material can be put inside a biogas plant?

Ans: – There are different material that are being used a biogas plant like the excretory of human being, garbage, vegetable waste, poultry waste, paper waste etc.

7) Explain any two differences between nuclear fusion and nuclear fission.

Ans: –

Nuclear fusion

Nuclear fission
In fusion reaction two different atom make a larger atom and produced energy.

In fission reaction any single atom divided into different atoms.

There is no chain reaction.

Chain reaction is present there.

8) On what basis we can classify the sources of energy into renewable and non-renewable.

Ans: – The source that are replenish in nature is differentiate between the renewable and non-renewable energy.

9) Write two sources of energy which you think are renewable. Give reasons for your choices.

Ans: – The source of renewable energy is tidal and wind energy. As the source of this material are not limited in nature this called the renewable energy.If the earth remains thenthese sources of energy will be remained.

10) Write down the benefits of use of solar energy.

Ans: – The benefits of uses solar energy are –

  • There no limited resources of that.
  • There will be no pollution after uses this energy sources.

11) What are limitations of wind energy?

Ans: – The limitations of wind energy are –

  • As we all know that the installation equipment of wind energy is very costly so for poor nation it will be very problematic.
  • Second things are that we are not able till now to learn this technology more so there is an immaturity in technology remain.

12) What do you understand by conversion of energy?

Ans: – The conversion of energy means the changes of energy from one form to other form. As we all know from the laws of conservation of energy that the energy doesn’t create or destroyed.So, by the different way like the tidal, wind,hydro, sunlight the energy converse to the other form.

Updated: December 27, 2021 — 11:22 am

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