NCERT Solutions for Chapter 14 Science Class 10 are curated by our team of experts. NCERT Solutions for Science Chapter 14- Sources of Energy Class 10 are framed strictly in accordance with the CBSE Curriculum and the exam pattern. These are the best resources designed after proper research and study to assist the students in scoring good marks. The NCERT textbook questions are answered in a way to provide you with a better understanding of the concepts. Also, the MCQs and long and short questions are all answered according to the weightage and the exam pattern. As Class 10 exams are Board exams, NCERT Solutions provided by Toppr are the best study material. These solutions will not only help the students in preparing for the board exams but also for the Olympiads. With the help of NCERT Solutions for Science Chapter 14- Sources of Energy Class 10 you can also analyze your shortcomings and work on them before the exams.
What is a good source of energy?
Solar energy is the direct source of energy. It is a renewable source of energy. Solar energy is available free of cost to all in unlimited amount.
Coal and petroleum are fossil fuels. They are obtained from deep under Earth's crust.
What are the limitations of extracting energy from
On what basis would you classify energy sources as
a) renewable and non-renewable?
b) exhaustible and inexhaustible?
Are the options given in (a) and (b) the same?
a) Sources of energy which can be regenerated are called renewable sources of energy whereas the sources of energy which cannot be regenerated are called non-renewable sources of energy.
Renewable sources: Sun (solar energy), biomass, wind energy, etc
Non-renewable sources: Coal, petroleum, etc
b) Energy sources which will be exhausted in coming years are called exhaustible sources of energy whereas energy sources which will not be exhausted or disappear in some years are called inexhaustible sources of energy.
Exhaustible sources: Coal, petroleum, etc
Inexhaustible sources: Sun (solar energy), biomass, wind energy, etc
Yes, both a) and b) are almost the same.
The qualities of an ideal source of energy are as follows:
1. Which librate large amount of energy per unit volume or mass.
2. Be easily accessible.
3. Be easy to store and transport, and
4. Perhaps most importantly, be economical.
Solar energy is used in the solar cookers to cook food. As solar energy is renewable source of energy and it is available in unlimited amount, the operation cost of solar cooker is very low. But the manufacturing cost of solar cooker is very high and it doesn't work in absence of sunlight. Places where there is not enough sunlight as the days are too short or always cloudy, solar cookers cannot be used.
Question 1. Explain the process of the production of Bio-gas?
Answer. The Bio-gas plant is built with bricks and has a dome-like structure. In the mixing tank, a slurry of cow dung and water is made. From here, it is transferred into the digester which is a sealed chamber without any oxygen. In the digester, anaerobic micro-organisms decompose or break down complex compounds of the slurry. It takes a few days for the completion of the decomposition process after which the generation of gases like methane, carbon dioxide, hydrogen and hydrogen sulphide takes place. The bio-gas thus produced are stored in the gas tank above the digester. It is drawn from there through pipes for use.
Question 2. What do you understand about Renewable energy sources?
Answer. Renewable sources of energy are the ones that are derived from natural sources such as sun, wind, water, etc. These resources can be replenished. The energy derived from these can be converted into various forms of energy such as solar energy, wind energy, hydropower plants, etc. Solar energy is used in solar cookers, solar panels to generate electricity, solar batteries etc. Wind energy is used in windmills.
Question 3. What is the major hazard of using Nuclear energy?
Answer. The primary hazard of using nuclear energy generation is the storage and disposal of spent or used fuels. If it is not done properly it can result in environmental contamination. Uranium keeps decaying into harmful subatomic particles (radiations) and thus, there is a risk of accidental leakage of nuclear radiation. Also, the cost of the installation of a nuclear power plant is very high.