CBSE Class 10 Science Chapter-14 Sources of Energy – Free PDF Download
Free PDF download of Important Questions with Answers for CBSE Class 10 Science Chapter 14 – Sources of Energy prepared by expert Science teachers from latest edition of CBSE(NCERT) books only by CoolGyan to score more marks in CBSE board examination.
CBSE Class 10 Science Chapter-14 Sources of Energy Important Questions
CBSE Class 10 science Important Questions Chapter 14 – Sources of Energy
1 Mark Questions
1. A solar cooker may not cook food if.
(a) Interior of the box and the container of food are perfectly shining.
(b) Glass sheet over the box is not closed.
(c) Solar cooker is placed in the shade.
(d) All the above.
Ans. (d) All the above.
2. Radiations which are harmful to the living organisms are
(a) Infrared radiation.
(b) ultraviolet radiations
(c) Visible radiation.
(d) micro waves
Ans. (b) ultraviolet radiations
3.Solar cells are made of
(a) metals
(b) insulator
(c)semi conductors
(d) none of these
Ans. (a) Seine conductors
4. The main constituent of CNG is
(a) butane
(b) methane
(c) ethane
(d) propane
Ans. (b) methane
5. Which of the following is not a bio mass energy source?
(a) gobar gas
(b) coal
(c) wood
(d) nuclear energy
Ans. (d) nuclear energy
6. Which of following is more environment friendly?
(a) Burning of coal
(b) burning of fire wood
(c) burning of charcoal
(d) Burning of diesel.
Ans. (c) burning of charcoal
7. Major problem in harnessing nuclear energy is to
(a) split heavy nucleus
(b) sustain nuclear reactions
(c) Convert nuclear energy into electricity
(d) dispose off spent fuel safety.
Ans. (d) dispose off spent fuel safety.
8. Fusion reaction is also known as
(a) chemical reaction
(b) elastic scattering
(c) thermonuclear reaction
(d) photo nuclear reaction
Ans. (c) thermonuclear reaction
9. India exploded her first underground nuclear device at
(a) Ranchi
(b) Kota
(c) Jaipur
(d) Pokhran
Ans. (d) Pokhran
10. Although charcoal is a clean and a better source of heat energy yet it cannot be used as a domestic fuel because it
(a) cause environmental pollution
(b) produce less heat energy
(c) cannot be stored easily
(d) is expensive fuel
Ans. (d) is expensive fuel
11. A solar water heater cannot be used to get hot water on
(a) a sunny day
(b) a cloudy day.
(c) a hot day
(d) a windy day.
Ans. (b) a cloudy day.
12. Which of the following is not an example of a bio-mass energy?
(a) wood
(b) gobar-gas
(c) nuclear energy
(d) coal
Ans. (c) nuclear energy
13. Most of the sources of energy we use represent stored solar energy. Which of the following is not ultimately derived from the Sun’s energy?
(a) geothermal energy
(b) wind energy
(c) nuclear energy
(d) bio-mass
Ans. (c) nuclear energy
14. In the given flow chart of energy conversion during hydroelectric power generation, fill in the blanks with appropriate answer.
Ans. Dynamo.
15. Consider two solar cooker, one covered with a plane glass plate and other kept open. Which of the two cooker would be more efficient and why?
Ans. Solar cooker with covered glass slab, as it will show green house effect.
16. Give one reason how increasing dependence on nuclear power generation is a threat for future generation?
Ans. Radiation emitted during leakage can change the genetic arrangement or disposal to nuclear waste.