Vidaara.orgClass 8 · Mathematics
CodeVID-M8-WS
Coal and Petroleum — Practice Worksheet
Name: ____________________
Roll No.: __________
Date: ____________
General Instructions
- All questions are compulsory.
- Choose the correct option (A, B, C or D) for each question.
- The answer key is at the end — try the paper first!
Section A — Multiple Choice (1 mark each)
15 × 1 = 15 marks
1.
Resources present in unlimited amount that will not run out are called:
- A.Exhaustible
- B.Inexhaustible
- C.Fossil fuels
- D.Minerals
2.
Coal, petroleum and natural gas were formed from:
- A.Dead remains of organisms
- B.Melted rocks
- C.Sea salt
- D.Sunlight
3.
Coal is mainly made of the element:
- A.Iron
- B.Carbon
- C.Sulphur
- D.Oxygen
4.
The slow process of conversion of dead vegetation into coal is:
- A.Refining
- B.Carbonisation
- C.Distillation
- D.Galvanisation
5.
An almost pure form of carbon obtained from coal, used to extract metals, is:
- A.Coke
- B.Coal tar
- C.Coal gas
- D.Petrol
6.
Dyes, paints and medicines can be made from which product of coal?
- A.Coke
- B.Coal gas
- C.Coal tar
- D.Petrol
7.
Petroleum is often called:
- A.White gold
- B.Black gold
- C.Green fuel
- D.Coke
8.
The separation of petroleum into useful fractions is called:
- A.Carbonisation
- B.Refining
- C.Combustion
- D.Filtration
9.
Which fraction of petroleum is used as fuel in cars?
- A.Bitumen
- B.Petrol
- C.Paraffin wax
- D.Lubricating oil
10.
Which petroleum product is used for surfacing roads?
- A.Bitumen
- B.Kerosene
- C.LPG
- D.Diesel
11.
LPG obtained from petroleum is mainly used for:
- A.Cooking
- B.Road making
- C.Making candles
- D.Lubrication
12.
CNG stands for:
- A.Compressed Natural Gas
- B.Coal and Natural Gas
- C.Carbon Nitrogen Gas
- D.Clean Nuclear Gas
13.
Natural gas is considered a good fuel because it:
- A.Is dirty and smoky
- B.Is clean and easy to transport by pipe
- C.Cannot be burned
- D.Is a solid
14.
Fossil fuels must be conserved because they are:
- A.Inexhaustible
- B.Exhaustible and will run out
- C.Useless
- D.Always increasing
15.
In India, the organisation that advises people on saving petroleum products is:
- A.PCRA
- B.ISRO
- C.WHO
- D.FIFA
Section B — Challenge / Olympiad (2 marks each)
6 × 2 = 12 marks
16.
Why does it take care over thousands of years to use coal and petroleum 'sustainably', unlike sunlight?
- A.They take millions of years to form and cannot be quickly replaced
- B.They are made fresh daily
- C.They never run out
- D.They are renewable
17.
Different fractions of petroleum (petrol, diesel, kerosene) are separated during refining because they have different:
- A.Boiling points
- B.Colours only
- C.Magnetic strengths
- D.Tastes
18.
Switching to CNG buses in a city mainly helps to:
- A.Reduce air pollution
- B.Increase petrol use
- C.Make more coal tar
- D.Use more diesel
19.
Coke is preferred over raw coal in extracting iron because coke:
- A.Is a purer, hotter-burning form of carbon
- B.Is a liquid
- C.Contains no carbon
- D.Is a non-metal oxide
20.
A driver who switches off the engine at a long red light is practising:
- A.Fuel conservation
- B.Carbonisation
- C.Refining
- D.Displacement
21.
Burning fossil fuels adds carbon dioxide to the air. Too much of it is a problem because it:
- A.Contributes to global warming
- B.Cools the Earth
- C.Cleans the air
- D.Makes fuels renewable
Answer Key
Section A — Multiple Choice (1 mark each)
- (B) Inexhaustible
- (A) Dead remains of organisms
- (B) Carbon
- (B) Carbonisation
- (A) Coke
- (C) Coal tar
- (B) Black gold
- (B) Refining
- (B) Petrol
- (A) Bitumen
- (A) Cooking
- (A) Compressed Natural Gas
- (B) Is clean and easy to transport by pipe
- (B) Exhaustible and will run out
- (A) PCRA
Section B — Challenge / Olympiad (2 marks each)
- (A) They take millions of years to form and cannot be quickly replaced
- (A) Boiling points
- (A) Reduce air pollution
- (A) Is a purer, hotter-burning form of carbon
- (A) Fuel conservation
- (A) Contributes to global warming
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