Class 8 Exam > Class 8 Notes > Science Class 8 > HOTS Questions: Coal and Petroleum
HOTS Questions: Coal and Petroleum | Science Class 8 PDF Download
1. When heated in air produces
a. Carbon monoxide
b. Carbon dioxide
c. Nitrogen dioxide
d. Oxygen
2. Coal is produced in industry to get
a. Coke
b. Coal tar
c. Coal gas
d. All of these
3. Coke is used in the manufacturing of
a. Lead
b. Iron
c. steel
d. Copper
4. Which is an almost pure form of carbon?
a. Coke
b. Coal tar
c. Coal gas
d. None of these
5. The characteristic of coal is
a. tough
b. Black in colour
c. Porous
d. All of these
6. Coal tar has an _________ smell.
a. Unpleasant
b. Pleasant
c. Both (a) & (b)
d. None of these
7. Coal tar is used in manufacture of
a. Synthetic dyes
b. Drugs
c. Explosives
d. All of these
8. Naphthalene balls are obtained from
a. Carbon
b. Coke
c. Coal tar
d. Coal gas
9. Which gas is obtained during the processing of coal?
a. Carbon dioxide
b. Coal gas
c. Carbon monoxide
d. Sulphur dioxide
10. Heavy motor vehicles like trucks run on
a. Petrol
b. Diesel
c. Coal
d. Coal tar
11. Petrol and diesel can be obtained from
a. Coal tar
b. Coal
c. Petroleum
d. Coal gas
12. Petroleum is formed from
a. Domestic animals
b. Organisms in sea
c. Wild animals
d. Insects
13. Petroleum is mixture of
a. Petrol
b. Diesel
c. Petroleum gas
d. All of these
14. The layer containing petroleum oil & gas is
a. Above that of water
b. Below water
c. Between water and sand
d. Below sand
15. Refining is
a. Extracting petroleum gas
b. Separation of various fractions of petroleum
c. Heating of coal
d. Sedimentation of fossil fuel
1. b
2. d
3. c
4. a
5. d
6. a
7. d
8. c
9. b
10.b
11. c
12. b
13. d
14. a
15. b
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FAQs on HOTS Questions: Coal and Petroleum - Science Class 8
| 1. What are the uses of coal and petroleum? |  |
Ans. Coal is used mainly for generating electricity in power plants, producing steel, and manufacturing cement. Petroleum is used as a fuel for transportation, heating, and electricity generation. It is also used in the production of plastics, chemicals, and other industrial products.
| 2. How is coal formed? | |
Ans. Coal is formed from the remains of plants that lived millions of years ago in swamps and bogs. Over time, the plant matter is buried by sediment and undergoes a series of chemical and physical changes, resulting in the formation of coal.
| 3. What are the environmental impacts of using coal and petroleum? | |
Ans. Burning coal and petroleum releases greenhouse gases and other pollutants into the atmosphere, contributing to climate change and air pollution. Mining coal can also have negative impacts on local ecosystems and water quality.
| 4. What is the difference between coal and petroleum? | |
Ans. Coal is a solid fossil fuel that is primarily used for electricity generation and industrial purposes. Petroleum, on the other hand, is a liquid fossil fuel that is mainly used for transportation, heating, and electricity generation. Coal is formed from the remains of plants, while petroleum is formed from the remains of marine organisms.
| 5. What are some alternative sources of energy to coal and petroleum? | |
Ans. Some alternative sources of energy include solar power, wind power, hydropower, geothermal power, and biomass energy. These sources of energy are renewable, meaning they can be replenished naturally and do not produce greenhouse gases or other pollutants.
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