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CBSE Sample Paper Class 8 Science Coal and Petroleum
Coal and Petroleum
1.) Answer the short questions (10×1)
a.) What is natural resource?
b.) What is fossil fuel?
c.) What is the main component of coal?
d.) What is carbonisation?
e.) What are the processed product from coal?
f.) Name of the materials we get from petroleum.
g.) What is CNG?
h.) Which vehicle is the least polluting?
i.) What is the most pure form of coal?
j.) What is petrochemicals?
2.) Briefly answer the following questions (6×3)
a.) Classify and describe natural resources.
b.) Uses of coal.
c.) What is refining of Petroleum?
d.) Write the function of the following.
Petrol, Kerosene and Diesel
e.) Mention the ways someone can save fuel while driving.
f.) Name the various constituents of Petroleum.
3.) Fill in the blanks (8×1)
a.) Coal mainly contains ______.
b.) ______ and _______ is obtained from petroleum.
c.) Petroleum is refined in a ________.
d.) Fossil fuel are ________ natural resource.
e.) Coal tar is in ______ form.
f.) World’s first oil well was drilled in _______.
g.) Petroleum is a ______ fuel.
h.) Naphthalene is obtained from _______.
4.) Write true or false (8×1)
a.) Petroleum is a clear oily liquid.
b.) Coal and petroleum are exhaustible resources.
c.) CNG is a very polluting fuel.
d.) Coal gas is obtained during the processing of coal to get coke.
e.) We can use natural resources recklessly.
f.) Air is an exhaustible resource.
g.) Fossil fuel can be made in labs.
h.) Coke is mixture of 200 substances.
(5) Match the columns (6×1)
Column A |
Column B |
Sunlight |
Petroleum |
Bitumen |
Candles |
Paraffin wax |
Carbon |
Black gold |
Inexhaustible |
CNG |
Road surface |
Coal |
Clean fuel |
Answer
(1) Answer the short questions (10×1)
(a) What is natural resource?
Answer – Substances or resources obtained from the nature is called natural resources.
(b) What is fossil fuel?
Answer – Natural resources like coal, petroleum and natural gas, all are formed form the dead remaining of living organisms or the fossils. So these are called fossil fuel.
(c) What is the main component of coal?
Answer – Main component of coal is carbon.
(d) What is carbonisation?
Answer – The slow conversion of dead vegetation into coal under high pressure and high temperature is called carbonisation.
(e) What are the processed product from coal?
Answer – The processed product of coal are coke, coal tar and coal gas.
(f) Name of the materials we get from petroleum.
Answer – Petrol and diesel we get from petroleum.
(g) What is CNG?
Answer – Natural gas is stored under high pressure, so it is called compressed natural gas.
(h) Which vehicle fuel is the least polluting?
Answer – CNG is the least polluting vehicle fuel.
(i) What is the most pure form of coal?
Answer – Coke is the most pure form of coal.
(j) What is petrochemicals?
Answer – The useful substances that are obtained from petroleum and natural gas are called petrochemicals.
(2) Briefly answer the following questions (6×3)
(a) Classify and describe natural resources.
Answer – Natural resources are two types, inexhaustible natural resources and exhaustible natural resources.
- Inexhaustible natural resources – This kind of resources are unlimited in nature and they are less likely to be exhausted.
- Exhaustible natural resources –This kind of resources are limited in nature and there is a risk for it to be exhausted from nature due to human activities.
(b) Uses of coal.
Answer – Used of coal includes,
- Coal was used in rail engines.
- Coal is used in thermal power plants to produce energy.
- Coal is used to cook food.
- Various industry use coal as fuel.
(c) What is refining of Petroleum?
Answer – Petroleum is a dirty crude oil. It consists of lots of components. These components are separated in refineries. This separation of components is called refining of Petroleum.
(d) Write the function of the following.
Petrol, Kerosene and Diesel
Answer –
Petrol – Petro is used as motor fuel, aviation fuel.
Kerosene – It is used as fuel for stoves, lamps and for jet aircrafts.
Diesel – Diesel is used in heavy motor vehicles, electric generators.
(e) Mention the ways someone can save fuel while driving.
Answer – The ways to save fuel while driving includes,
- We should drive at a constant and moderate speed as far as possible.
- We should switch off the engine in traffic lights and when we are waiting.
- Tire pressure should be correct.
- Regular maintenance of car.
(f) Name the various constituents of Petroleum.
Answer – The various constituents of Petroleum are,
- Liquid petroleum gas
- Petrol
- Kerosene
- Diesel
- Lubricating oil
- Paraffin wax
- Bitumen
(3) Fill in the blanks (8×1)
(a) Coal mainly contains carbon .
(b) Petrol and diesel is obtained from petroleum.
(c) Petroleum is refined in a petroleum refinery .
(d) Fossil fuel are exhaustible natural resource.
(e) Coal tar is in liquid form.
(f) World’s first oil well was drilled in Pennsylvania, USA .
(g) Petroleum is a fossil fuel.
(h) Naphthalene is obtained from coal tar .
(4) Write true or false (8×1)
(a) Petroleum is a clear oily liquid.
Answer – False.
(b) Coal and petroleum are exhaustible resources.
Answer – True.
(c) CNG is a very polluting fuel.
Answer – False.
(d) Coal gas is obtained during the processing of coal to get coke.
Answer – True.
(e) We can use natural resources recklessly.
Answer – False.
(f) Air is an exhaustible resource.
Answer – False.
(g) Fossil fuel can be made in labs.
Answer – False.
(h) Coke is mixture of 200 substances.
Answer – False.
(5) Match the columns (6×1)
Column A |
Column B |
Sunlight |
Inexhaustible |
Bitumen |
Road surface |
Paraffin wax |
Candles |
Black gold |
Petroleum |
CNG |
Clean fuel |
Coal |
Carbon |