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Coal and Petroleum (Class - VIII)

Description: Coal and Petroleum
Number of Questions: 15
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Tags: Coal and Petroleum Class - VIII Science Classification of Resources Crystallization Rusting and Its Prevention Identifying Chemical Changes Physical Changes and Its Characteristics Common Types of Chemical Changes Coal - its Discovery and its Products Petroleum and the Process of Refining Natural Gas, a Natural Resource Limited Life of Certain Natural Resources
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Which of the following statements regarding 'natural resources' is incorrect?

  1. All the natural resources occur in nature.

  2. Fossil fuel is a type of natural resource.

  3. All natural resources are non-living.

  4. Both options 1 and 2

  5. Both options 2 and 3

Show answer
Correct Option: C
Explanation:

Yes, it is the correct answer, as this statement is incorrect. These resources can be either living or non-living.

Which of the following statements regarding coal is incorrect?

  1. The only product produced after processing coal is coke.

  2. It is used to generate electricity.

  3. It is a hard and black substance.

  4. It is used to bake bricks.

  5. Coal is a fossil fuel.

Show answer
Correct Option: A
Explanation:

Yes, it is the correct answer. After processing of coal, the products produced are coke, coal tar and coal gas.

Which of the following are the conditions under which fossil fuels are formed from the remains of organisms?

(a) Absence of oxygen

(b) Absence of water

(c) High temperature

(d) High pressure

  1. Only (a), (b) and (c)

  2. Only (b), (c) and (d)

  3. Only (a) and (b)

  4. Only (c) and (d)

  5. Only (a), (c) and (d)

Show answer
Correct Option: E
Explanation:

Yes, it is correct. When the dead remains of plants and animals are deprived of oxygen and the temperature and pressure is high for a long period of time, fossil fuels are formed.

Which of the following statements is/are true regarding geothermal energy resource?

  1. It is the heat of the Earth.

  2. It is used in electricity production.

  3. It produces lots of pollution.

  4. Only 1 and 2

  5. Only 1 and 3

Show answer
Correct Option: D
Explanation:

Yes, it is correct. Both 1 and 2 are true.

Which of the following products obtained after processing coal is/are used in the manufacture of steel?

  1. Carbon dioxide

  2. Coal tar

  3. Coke

  4. Coal gas

  5. All of these

Show answer
Correct Option: C
Explanation:

Yes, it is correct. Coke is the tough, porous black substance used in manufacturing steel.

Which of the following statements correctly defines coal?

  1. Coal is soft and black stone like substance formed from the remains of dead animals.

  2. Coal is hard and black stone like substance formed from the remains of dead plants.

  3. Coal is soft and black stone like substance formed from the remains of dead animals and plants.

  4. Coal is hard and black stone like substance formed from the remains of dead animals and plants.

  5. Coal is hard and black stone formed by deposition of sand.

Show answer
Correct Option: B
Explanation:

Yes, it is the correct answer. It is hard and black stone like substance formed by the decomposition of the dead remains of plants when they got buried under high temperature and high pressure.

Dilute sulphuric acid is used in the extraction and refining process of petroleum to

  1. remove basic impurities

  2. obtain various components of petroleum

  3. remove acidic impurities

  4. pump out oil from the pipe

  5. None of these

Show answer
Correct Option: A
Explanation:

Yes, it is correct. Acid is used to remove basic impurities from petroleum.

Which of the following is not an air pollutant produced by the combustion of fossil fuels?

  1. Sulphuric acid

  2. Nitrogen oxide

  3. Sulphur dioxide

  4. Heavy metals

  5. Volatile organic compounds

Show answer
Correct Option: A
Explanation:

Yes, it is the correct answer. Sulphur dioxide, when produced in excess, rises high in the atmosphere and reacts with water to produce sulphuric acid. This causes acid rain.

On heating in absence of oxygen (pyrolysis), n-hexadecane cracks into

  1. two octanes

  2. two octenes

  3. n-octane and one octene

  4. n-octene and octane

  5. None of these

Show answer
Correct Option: C
Explanation:

Yes, it is correct. N-hexadecane, on heating, cracks into n-octane and octene.

Petrol and diesel are the most common fuels used for automobiles. They are obtained from petroleum and are formed from

  1. dead plants

  2. dead animals buried underground

  3. dead organisms of the sea

  4. dead marine plants

  5. All of these

Show answer
Correct Option: C
Explanation:

Yes, it is correct. Sea organisms that die get accumulated at the bottom of the sea. The deposition of sand and clay on them compresses this organic material and converts it into petroleum.

Which of the following petroleum products is used in making roads nowadays?

  1. Coke

  2. Coal tar

  3. Bitumen

  4. Coal

  5. None of these

Show answer
Correct Option: C
Explanation:

Yes, it is correct. Bitumen is nowadays used to make roads instead of coal tar. Bitumen is commonly called asphalt.

Which of the following products is/are produced when combustion of pentane takes place in the presence of insufficient amount of oxygen?

  1. Carbon dioxide

  2. Carbon dioxide and water

  3. Methane and propane

  4. Carbon monoxide and water

  5. None of these

Show answer
Correct Option: D
Explanation:

Yes, it is correct. Incomplete combustion of pentane takes place in insufficient amount of oxygen. The products then produced are carbon monoxide and water.

Which of the following is not a method of conserving petroleum?

  1. Correct pressure levels in the tyres while driving a petrol vehicle

  2. Driving at high speed and reaching the destination faster

  3. Using public transport

  4. Switching off engines at traffic junctions

  5. Timely servicing of vehicles

Show answer
Correct Option: B
Explanation:

Yes, it is the correct answer. Fuel consumption increases significantly over 90 km/h. At 110 km/h, a car uses up to 25 per cent more fuel than it would consume at 90 km/h.

Natural gas is used in the production of fertilisers because

  1. it supplies hydrogen gas used in the process

  2. it supplies nitrogen gas used in the process

  3. it supplies ammonia

  4. it supplies oxygen

  5. None of these

Show answer
Correct Option: A
Explanation:

Yes, it is correct. Natural gas supplies hydrogen and nitrogen is supplied by the air for the process used to make fertilisers.

Natural gas is a better fuel because

(1) It burns completely

(2) It is cheaper

(3) It generates less pollution

(4) It is a fossil fuel

  1. Only (1) and (2)

  2. Only (2) and (3)

  3. Only (3) and (4)

  4. Only (1) and (3)

  5. Only (2) and (4)

Show answer
Correct Option: D
Explanation:

Yes, it is correct. Natural gas is a better fuel because it burns completely and releases very few polluting emissions.

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