different perc
Name any two renewable natural sources of energy
Name the three main products obtained from destructive distillation of coal
Write the full forms of CNG, LPG and PNG.
How do petroleum and natural gas occur in nature?
State the main advantages of using natural gas.
Keeping in mind their availability in nature, explain the need of using coal and
petroleum judiciously
Different types of coal generally have the
same content of volatile material and same percentage of carbon
same content of volatile material but different percentage of can
different content of volatile material but same percentage of cart
different content of volatile material as well as
A product, that is not obtained through the refining of petroleum, is
Which of the following is a renewable source of energy?
Answer the following questions in brief.
Define the term fuel. Suoso
Describe, in brief, the process of 'coal formation
Differentiate between lignite and bituminous coal.
3
4.
diesel
Icoal gas
5
tidal energy
diesel
D.
1
carbon
kerosene
petrol
Value Based Question
The chemistry teacher, explained to her students that when petroleum, a naturally
occaring fossil fuel, is separated into its different components, each of these compo-
ents is useful in one way or the other. She then told her students that our daily life
100 can be thought of as 'made up of a number of activities, actions and tasks. She
suggested that 'all of us' should try to ensure and aim that all these components of
eur daily life, are useful/helpful to the society at large.
State the values that you think are contained in the teacher's talk and suggestions.
2 Name any three components, obtained from petroleum, and state any one use of
cach of them
Have a group discussion in which different students suggest ways and means of
making their different daily life actions and activities, useful to the society at large.
o coal
petrol
2
3
Define the term carbonisation
2
4
5
State two uses each of the following:
Something To Do
Make a report on 'electricity consumption' in your house. Suggest some ways that
can help to reduce the consumption.
Unlike thermal power plants, which burn fossil fuels and emit large amounts of
carbon dioxide (a greenhouse gas) into the atmosphere, nuclear power plants use
uranium (a metal) to produce huge amounts of energy from very small amount
of fuel. However, they release harmful radiations that can pose a high risk to the
population.
Do you think nuclear energy can be an answer to the problems caused by the use
of fossil fuels? Try to prepare a report, listing points that suggest that nuclear
power could be could not be a better way of generating electricity as compared to
fossil fuels.
3. Try to find out information about the places/activities for which solar energy or
wind energy is being put to use in place of conventional fossil fuel based energy
sources.
(a) asphalt
(b) paraffin wax
6.
E.
Answer the following questions.
2
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118
Answers
Answer:
two renewable sources of energy - solar energy and geothermal energy
the three main products obtained from destructive distillation of coal are :-
1. Coke. 2. Coal Tar. 3. Coal gas
the full form of CNG - Compressed Natural gas
Full form of PNG - Piped Natural gas
Full form of LPG - Liquified Petroleum Gas
Petrol and natural gas are formed from the remains of plants and animals buried deep inside the earth crust. They are also known as fossil fuels. Million years ago, the plants and algae live in the shallow sea and after dying they were deep buried under the layers of the earth. These are formed in millions of years.
the main advantages of using natural gas are :-
1. Natural gas is abundant and a major source of energy. ...
2. Infrastructure already in place. ...
3. Natural gas can be easily transported. ...
4. Natural gas produces less overall pollution.
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