Class 8 Science - Coal and Petroleum CBSE Worksheets Solutions

Multiple Choice Questions (MCQs)

Q1: What type of natural resources are present in unlimited quantity in nature?

A) Exhaustible resources
B) Non-renewable natural resources
C) Inexhaustible resources
D) Limited resources

Ans. C) Inexhaustible resources

Q2: What is coal primarily used for in manufacturing industries?

A) Generating electricity
B) Producing heat and power
C) Making steam for heating
D) Steel making

Ans. A) Generating electricity

Q3: What is the main constituent of natural gas?

A) Ethane
B) Butane
C) Propane
D) Methane

Ans. D) Methane

Q4: Where was the first oil well drilled?

A) Pennsylvania, USA
B) Assam, India
C) Gujarat, India
D) Mumbai High, India

Ans. A) Pennsylvania, USA

Q5: Which of the following is a use of bitumen?

A) Used in paints
B) Used to surface roads
C) Used in ointments
D) Both a and b

Ans. D) Both a and b

Fill in the Blanks

Q1: Natural resources like coal and petroleum are considered Non-renewable resources because they do not regenerate quickly.

Q2: The first use of coal gas for street lighting was in London in the year 1810.

Q3: The purest form of carbon obtained from coal is called coke.

Q4: The main constituent of natural gas is methane.

Q5: Coal is formed from the remains of vegetation that have been subjected to high pressure and temperature over millions of years.

True or False

Q1: Petroleum is lighter than water, which is why it usually forms deposits above water.

Ans. True

Q2: Coal was first used for cooking and heating during the carboniferous age.

Ans. True

Q3: LPG is used as a lubricating oil in various mechanical processes.

Ans. False

Q4: Natural gas produces a significant amount of ash when burned.

Ans. False

Q5: Coal tar was the first material used to surface roads.

Ans. False

Very Short Answer Questions

Q1: Name the petroleum product used for surfacing of roads.

Ans: Bitumen, a petroleum product, is used for metalling the roads.Bitumen

Q2:  What are ‘Petrochemicals’?

Ans: Many useful substances are obtained from petroleum and natural gas. These are termed as ‘Petrochemicals’.

Q3: Explain the process of formation of petroleum.

Ans: Petroleum was formed from organisms living in the sea. As these organisms died, their bodies settled at the bottom of the sea and got covered with layers of sand and clay. Over millions of years, absence of air, high temperature and high pressure transformed the dead organisms into petroleum and natural gas.Petrochemical Plant

Q4: Which fuel is used in heavy motor vehicles?

Ans: Diesel is used in heavy motor vehicles.Diesel

Q5: What is meant by refining of petroleum and where is it done?

Ans: The process of separating the various constituents/fractions of petroleum is known as refining. It is carried out in a petroleum refinery.

Q6: What are the advantages of using CNG and LPG as fuels?

Ans: The advantages of using CNG and LPG as fuels are:

• They can be transported easily through pipes.
• They can be used directly for burning in homes and factories where it can be supplied through pipes.
• They are clean fuels and do not give smoke when burnt.
• They are less polluting.

Q7: What are the uses of kerosene?

Ans: Kerosene is used as fuel in stoves, lamps and in jet aircrafts.Kerosene

Q8: How is coal gas obtained? Write its uses.

Ans: Coal gas is obtained during the processing of coal to get coke. It is used as a fuel in many industries situated near the coal processing plants.Coal

Q9: Write uses of coal tar.

Ans: Products obtained from coal tar are used as starting materials for manufacturing various substances used in everyday life and in industry, like synthetic dyes, drugs, explosives, perfumes, plastics, paints, photographic materials, roofing materials, etc. Interestingly, naphthalene balls used to repel moths and other insects are also obtained from coal tar.

Q10: Write the uses of paraffin wax.

Ans: Paraffin wax is used in ointments, candles, vaseline etc.Paraffin Wax