NIOS Class 10 Science and Technology Chapter 12: SOURCES OF ENERGY– Chapter-wise Important Questions and Answers

NIOS Class 10 Science and Technology Chapter 12: SOURCES OF ENERGY | MCQs, Short & Long Answer Questions | 12. SOURCES OF ENERGY

Chapter 12: SOURCES OF ENERGY

INTEXT QUESTIONS 12.1

1. List out any five activities from your daily life in which different forms of energy are involved.

Answer: The five daily activities involving different forms of energy are:

(a) Cooking of food – heat energy and chemical energy of fuel

(b) Lightning of bulbs – electrical energy and light energy

(c) Talking to each other – sound energy

(d) Cycling – mechanical energy

(e) Torch – chemical energy of cells.

 

2. What are the three most common forms of energy that we use frequently?

Answer:  The three most common forms of energy that we use frequently are:

(i) Heat, (ii) Light and (iii) Electricity

 

3. Differentiate between renewable and non-renewable sources of energy.

Answer: The difference between renewable and non-renewable sources of energy are :

Renewable Sources of Energy	Non-Renewable Sources of Energy
1. These sources can be replenished or renewed naturally over a short period of time.	1. These sources exist in limited quantities and take millions of years to form, so they get exhausted with use.
2. They are generally eco-friendly and cause little or no pollution (e.g., solar, wind, tidal energy).	2. They cause significant environmental pollution, including air, water, and soil pollution (e.g., coal, petroleum).
3. They are available abundantly in nature and are essentially free once the harnessing system is installed.	3. They are costly to extract, transport, and process, and their prices keep increasing due to scarcity.

 

INTEXT QUESTIONS 12.2

1. Name any four non-renewable sources of energy and give at least one advantage of each.

Answer:

Non-renewable Source of Energy	One Advantage
(i) Coal	It is cheaper and easily accessible.
(ii) Oil	It is excellent sources of energy for our transportation.
(iii) Natural Gas	It is cleaner burning than gasoline, but does produce Carbon Dioxide, the main greenhouse gas and it has high calorific value.
(iv) Nuclear Fuel	Nuclear fuel used in nuclear power stations does not burn and hence no waste gases are produced.

 

2. Nuclear energy is considered to be a very powerful alternative of fossil fuels. Even then why is it not being used on a much larger scale?

Answer: Nuclear energy is considered a very powerful alternative to fossil fuels. Even then, it is not being used on a much larger scale because of the following reasons:

(i) It is difficult to set up nuclear power plants.

(ii) A large amount of money is required to ensure safety in nuclear power plants.

(iii) The nuclear waste produced is hazardous and its disposal is difficult.

3. What are the limitations of using natural gas for meeting our energy requirements?

Answer: The limitations of using natural gas for meeting our energy requirements:

(i) Stock of natural gas is limited and it cannot be replenished.

(ii) Use of natural gas can cause unpleasant smell in the area.

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