Which of the following is not an example of a bio-mass energy source?
NCERT Solution for Class 10 Science Chapter 14
Sources of Energy
NCERT Books for Session 2020-2021
CBSE Board and UP Board
Exercises Questions
Page No-255
Questions No-2
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(c) Bio-mass is a source of energy that is obtained from biodegradable natural things (plant materials and animal wastes). Nuclear energy is released during nuclear reactions like fission or fusion producing huge 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.
Hence, the option (c) is correct.
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c) Nuclear energy
Bio-mass is obtained from the dead plants and animal wastes. In these dead plants and animals there is a chemical change as they react with water and sunlight. But nuclear energy is obtained by fusion and fission of atoms resulting in tremendous release of energy. Both nuclear fusion and fission can be carried out in the absence of the sunlight.
Wood is a part of plant, gobar-gas is obtained from the animal dung and coal is obtained by the dead remains of the plants and animals. Therefore, they are all bio-mass energy products.