NCERT Solution Class X Science Sources of Energy Question 2 (Ex 14.6)

Question 2:

Which of the following is not an example of a bio-mass energy source?

(a) wood                   (b) gobar gas

(c) nuclear energy       (d) coal

Answer:

(c) Bio-mass is a source of energy that is obtained from plant materials and

animal wastes. Nuclear energy is released during nuclear fission and fusion.

In nuclear fission, uranium atom is bombarded with low-energy neutrons.

Hence, uranium atom splits into two relatively lighter nuclei. This reaction

produces huge amount of energy. In nuclear fusion reaction, lighter nuclei

are fused together to form a relatively heavier nuclei. This reaction produces

tremendous amount of energy. Hence, nuclear energy is not an example of

bio-mass energy source. Wood is a plant material, gobar gas is formed from

animal dung, and coal is a fossil fuel obtained from the buried remains of

plants and animals. Hence, these are bio-mass products.

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