Coal — Class 8 CBSE Science MCQs with Solutions
Free Class 8 CBSE Science Coal MCQs with step-by-step solutions (24 questions). Part of Coal and Petroleum. Practise online on Prepizo — no login needed.
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Questions with solutions
Q1 — Coal · easy · theory
What is the colour of coal?
A. Black ✓ Correct
B. White
C. Bright yellow
D. Green
Solution: Coal is black in colour and as hard as stone.
Q2 — Coal · easy · theory
Coal is described as being as hard as which of the following?
A. Stone ✓ Correct
B. Cotton
C. Rubber
D. Wax
Solution: Coal is as hard as stone.
Q3 — Coal · easy · theory
Coal is made up mainly of which element?
A. Carbon ✓ Correct
B. Oxygen
C. Nitrogen
D. Hydrogen
Solution: Coal contains mainly carbon.
Q4 — Coal · easy · theory
When coal is heated and burnt in air, which gas is mainly produced?
A. Carbon dioxide ✓ Correct
B. Oxygen
C. Hydrogen
D. Nitrogen
Solution: On burning in air, coal produces mainly carbon dioxide gas.
Q5 — Coal · easy · theory
The slow process by which dead vegetation is converted into coal is called:
A. Carbonisation ✓ Correct
B. Refining
C. Distillation
D. Extraction
Solution: The slow conversion of dead vegetation into coal is called carbonisation.
Q6 — Coal · easy · theory
Coke is an almost pure form of which substance?
A. Carbon ✓ Correct
B. Sulphur
C. Iron
D. Hydrogen
Solution: Coke is a tough, porous, black substance that is an almost pure form of carbon.
Q7 — Coal · easy · theory
Naphthalene balls, used to repel moths and insects, are obtained from which product of coal?
A. Coal tar ✓ Correct
B. Coke
C. Coal gas
D. Petrol
Solution: Naphthalene balls are obtained from coal tar.
Q8 — Coal · easy · theory
In thermal power plants, coal is burnt to produce:
A. Electricity ✓ Correct
B. Plastic
C. Steel
D. Fertiliser
Solution: Coal is used in thermal power plants to produce electricity.
Q9 — Coal · easy · theory
Earlier, coal was used in railway engines to produce ______ to run the engine.
A. Steam ✓ Correct
B. Electricity
C. Petrol
D. Diesel
Solution: Coal was earlier used in railway engines to produce steam that ran the engine.
Q10 — Coal · easy · theory
Which set correctly lists the three useful products obtained by processing coal?
A. Coke, coal tar and coal gas ✓ Correct
B. Petrol, diesel and kerosene
C. LPG, CNG and bitumen
D. Wax, grease and lubricating oil
Solution: Processing coal in industry gives coke, coal tar and coal gas.
Q11 — Coal · easy · theory
Coal tar is best described as:
A. A black, thick liquid with an unpleasant smell ✓ Correct
B. A clear, odourless gas
C. A white waxy solid
D. A light, sweet-smelling oil
Solution: Coal tar is a black, thick liquid with an unpleasant smell.
Q12 — Coal · easy · theory
Coal is correctly classified as a:
A. Fossil fuel ✓ Correct
B. Inexhaustible resource
C. Man-made fuel
D. Metal
Solution: Coal was formed from the dead remains of organisms, so it is a fossil fuel.
Q13 — Coal · medium · theory
Which product obtained from coal is used in the manufacture of steel?
A. Coke ✓ Correct
B. Coal tar
C. Coal gas
D. Naphthalene
Solution: Coke is used in the manufacture of steel and in extracting many metals.
Q14 — Coal · medium · theory
Which product of coal was once used for street lighting in cities like London and New York?
A. Coal gas ✓ Correct
B. Coal tar
C. Coke
D. Bitumen
Solution: Coal gas was first used for street lighting and is now used mainly as a source of heat.
Q15 — Coal · medium · theory
Buried dead forests were slowly converted into coal under conditions of:
A. High pressure and high temperature ✓ Correct
B. Low pressure and low temperature
C. High pressure but very low temperature
D. The complete absence of soil
Solution: Under high pressure and high temperature, the buried dead plants slowly turned into coal.
Q16 — Coal · medium · theory
Which of the following is NOT one of the products obtained by processing coal?
A. Bitumen ✓ Correct
B. Coke
C. Coal tar
D. Coal gas
Solution: Processing coal gives three products: coke, coal tar and coal gas. Bitumen is a product of petroleum, not coal.
Q17 — Coal · medium · theory
Coal tar is a mixture of about how many different substances?
A. About 200 ✓ Correct
B. About 20
C. Only 2
D. About 2000
Solution: Coal tar is a mixture of about 200 substances.
Q18 — Coal · medium · theory
Nowadays, which petroleum product is used in place of coal tar for surfacing (metalling) roads?
A. Bitumen ✓ Correct
B. Kerosene
C. Coke
D. LPG
Solution: Bitumen, a petroleum product, is now used instead of coal tar for surfacing roads.
Q19 — Coal · medium · theory
During the processing of coal to obtain which product is coal gas produced?
A. Coke ✓ Correct
B. Coal tar
C. Bitumen
D. Petrol
Solution: Coal gas is obtained during the processing of coal to get coke.
Q20 — Coal · medium · theory
The starting materials for synthetic dyes, drugs, explosives and perfumes are obtained from which product of coal?
A. Coal tar ✓ Correct
B. Coke
C. Coal gas
D. Diesel
Solution: The products of coal tar are the starting materials for dyes, drugs, explosives, perfumes and more.
Q21 — Coal · medium · theory
Coal gas is mainly used today as:
A. A fuel in industries situated near coal processing plants ✓ Correct
B. A fuel for jet aircraft
C. A lubricant for machines
D. A material for making candles
Solution: Coal gas is used as a fuel in industries situated near coal processing plants.
Q22 — Coal · medium · theory
About how long ago did the dense forests that formed coal get buried under the soil?
A. About 300 million years ago ✓ Correct
B. About 300 years ago
C. About 3,000 years ago
D. About 30 million years ago
Solution: Around 300 million years ago dense forests got buried and slowly turned into coal.
Q23 — Coal · medium · theory
Which of the following is NOT a use of coal?
A. Lubricating moving machine parts ✓ Correct
B. Cooking food
C. Running thermal power plants
D. Serving as a fuel in industries
Solution: Coal is used for cooking, power generation and as an industrial fuel, but lubrication is done by lubricating oil, not coal.
Q24 — Coal · medium · theory
Coal is called an exhaustible natural resource because it:
A. Is limited in amount and can be used up by human activities ✓ Correct
B. Is present in unlimited quantity
C. Can be easily made again in a laboratory
D. Is renewed quickly by nature
Solution: Coal is limited and can be exhausted by human use, so it is an exhaustible resource.