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प्रश्न
Why is charcoal considered better fuel than wood?
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उत्तर
Charcoal is considered a better fuel than wood because of the
following reasons:
- Calorific value of charcoal is higher than the calorific value of wood.
- It produces no smoke.
- It burns easily without any flame.
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संबंधित प्रश्न
State any four characteristics of a good source of energy.
What is meant by a renewable source of energy? Give two examples of renewable sources of energy.
A non-renewable source of energy is:
(a) wood
(b) alcohol
(c) hydrogen gas
(d) natural gas
Write the full forms of CNG and LPG.
Which of the following is not produced by the burning of fossil fuels?
(a) nitrogen oxides
(b) sulphur oxides
(c) sodium oxides
(d) carbon oxides
Name the major component of biogas.
Describe the construction and working of a biogas plant with the help of a labelled diagram.
A certain form of energy is available due to the difference in the temperature of water at the surface of the ocean and its deeper levels.
(a) Name the form of energy.
(b) Is this energy ultimately derived from the sun or not?
(c) Explain how this form of energy can be converted into electricity.
(d) What is the minimum temperature difference in water at the surface of ocean and its deeper level which is required to operate power plants based on is energy?
Fill in the blank
Solar cells use the power supplied by the ______.
Some natural resources are given below. Classify them into the exhaustible and inexhaustible natural resources.
| air, coal, natural gas, sunlight, petroleum, minerals, forests, oxygen |
