Class 8 Coal and Petroleum assertion and reason– Here, we will share Class 8 Coal and Petroleum assertion and reason for you to prepare for your upcoming exam. if you are searching for the Class 8 Coal and Petroleum assertion and reason worksheet, you are in the right place. queryexpress gives you Assertion Reasoning Questions in Class 8 Science Coal and Petroleum.
Assertion Reasoning Questions Class 8 Science chapter 5
- Assertion (A): Coal is called a fossil fuel.
Reason (R): Coal was formed from the remains of pre-historic plants and animals buried under the earth millions of years ago.
- Both A and R are true, and R is the correct explanation of A.
- Both A and R are true, and R is not the correct explanation of A.
- A is true, but R is false.
- A is false, but R is true
Answer: Both A and R are true, and R is the correct explanation of A.
2. Assertion (A): Coke is a better fuel than coal.
Reason (R): Coke produces more heat while burning and burns without producing any smoke.
Answer: Both A and R are true, and R is the correct explanation of A.
3. Assertion (A): Inexhaustible natural resources are present in unlimited quantity in nature.
Reason (R): Sunlight, air, and water are exhaustible natural resources.
Answer: A is true, but R is false.
4. Assertion (A): Coal gas was used for street lighting.
Reason (R): Coal gas produces light when it burns.
Answer: Both A and R are true, and R is the correct explanation of A.
5. Assertion (A): Bitumen is preferred over coal tar for metalling roads.
Reason (R): Bitumen is a product obtained from petroleum.
Answer: Both A and R are true, and R is the correct explanation of A.
6. Assertion (A): The heating of coal in the absence of air is called destructive distillation.
Reason (R): Destructive distillation of coal produces coal gas, coal tar, and coke.
Answer: Both A and R are true, and R is the correct explanation of A.
7. Assertion (A): Fossil fuels like coal, petroleum, and natural gas are inexhaustible resources.
Reason (R): Fossil fuels were formed from the remains of living organisms millions of years ago.
Answer: A is false, but R is true.
8. Assertion (A): Coal tar is a single compound.
Reason (R): Coal tar gives off an unpleasant smell when heated in the absence of air.
Answer: A is false, but R is true.
9. Assertion (A): Coal is the most valuable source of energy in India.
Reason (R): Coal is found in abundance in India and is mainly composed of carbon.
Answer: Both A and R are true, and R is the correct explanation of A.
- Assertion (A): The temperature rises as the buried remains of plants and animals sink deeper into the earth.
Reason (R): High temperature and high pressure convert the buried remains into fossil fuels.
Answer: Both A and R are true, and R is the correct explanation of A.
Class 8 Coal and Petroleum Assertion and Reason solutions
- Assertion (A): Coal gas is a mixture of methane, hydrogen, and some carbon monoxide.
Reason (R): Coal gas is obtained by heating coal in the presence of air.
Answer: A is true, but R is false.
- Assertion (A): Fossil fuels are considered non-renewable sources of energy.
Reason (R): Fossil fuels, once exhausted, cannot be replenished shortly.
Answer: Both A and R are true, and R is the correct explanation of A.
- Assertion (A): Coal tar contains many useful organic compounds.
Reason (R): Coal tar is obtained by heating coal in the absence of air.
Answer: Both A and R are true, but R is not the correct explanation of A.
- Assertion (A): Coal is an important source of electricity in thermal power plants.
Reason (R): Coal can be directly burned to produce heat energy.
Answer: Both A and R are true, and R is the correct explanation of A.
- Assertion (A): Naphthalene balls are used to repel moths and other insects.
Reason (R): Naphthalene is one of the compounds obtained from coal tar.
Answer: Both A and R are true, and R is the correct explanation of A.
- Assertion (A): Inexhaustible resources can be used again and again.
Reason (R): Inexhaustible resources have a never-ending supply in nature.
Answer: Both A and R are true, and R is the correct explanation of A.
- Assertion (A): The main component of coal is carbon.
Reason (R): Coal was formed from the remains of large land plants and trees.
Answer: Both A and R are true, but R is not the correct explanation of A.
- Assertion (A): Coke is used in the extraction of metals like iron and zinc.
Reason (R): Coke is an almost pure form of carbon and acts as a reducing agent.
Answer: Both A and R are true, and R is the correct explanation of A.
- Assertion (A): Coal tar is used for making roofing materials.
Reason (R): Coal tar contains various compounds that can be processed into useful products.
Answer: Both A and R are true, and R is the correct explanation of A.
- Assertion (A): ‘Exhaustible’ means something that can be used up completely.
Reason (R): Exhaustible resources are available in unlimited quantities in nature.
Answer: A is true, but R is false.
Class 8 coal and petroleum assertion and reason mcq
21. Assertion: Petroleum is found trapped between two layers of impervious rocks.
Reason: Impervious rocks prevent the upward migration of petroleum, leading to its accumulation.
Answer: Both A and R are true, and R is the correct explanation of A.
22. Assertion: Natural gas occurs above the petroleum oil trapped under the rocks.
Reason: Natural gas is lighter than petroleum and tends to migrate upwards.
Answer: Both A and R are true, and R is the correct explanation of A.
23. Assertion: The refining of petroleum into different fractions is done by fractional distillation.
Reason: Fractional distillation separates petroleum into fractions based on their boiling points.
Answer: Both A and R are true, and R is the correct explanation of A.
24. Assertion: Diesel is primarily used as a fuel in heavy motor vehicles such as buses and trucks.
Reason: Diesel engines are more efficient and suitable for heavy-duty applications compared to gasoline engines.
Answer: Both A and R are true, and R is the correct explanation of A.
25. Assertion: LPG (Liquefied Petroleum Gas) burns with a smokeless flame and does not cause air pollution.
Reason: LPG is cleaner than coal or traditional biomass fuels.
Answer: Both A and R are true, and R is the correct explanation of A.
26. Assertion: Paraffin wax, a fraction of petroleum, makes candles and wax paper.
Reason: Paraffin wax has a high melting point and burns efficiently.
Answer: Both A and R are true, and R is the correct explanation of A.
27. Assertion: Bitumen is used for road surfacing and water-proofing the roofs of buildings.
Reason: Bitumen is a durable material that provides waterproofing and protection against weathering.
Answer: Both A and R are true, and R is the correct explanation of A.
28. Assertion: Kerosene is used as a fuel in wick stoves and pressure stoves for cooking food.
Reason: Kerosene has a high energy density and burns efficiently.
Answer: Both A and R are true, and R is the correct explanation of A.
29. Assertion: Petroleum gas (LPG) is used as a fuel in homes and industry.
Reason: LPG is a convenient and versatile fuel used for cooking, heating, and powering industrial processes.
Answer: Both A and R are true, and R is the correct explanation of A.
30. Assertion: Petroleum refining separates crude oil into useful fractions such as petrol, diesel, and lubricating oil.
Reason: Each fraction obtained from petroleum refining has a different chemical composition and boiling point range.
Answer: Both A and R are true
Assertion and reason Questions With Answers Class 8
31. Assertion: Petroleum is not very useful in its crude form and needs to be refined before use.
Reason: Crude petroleum contains impurities and a mixture of hydrocarbons that require separation to obtain useful products.
Answer: Both A and R are true, and R is the correct explanation of A.
32. Assertion: Impervious rocks play a crucial role in the accumulation of petroleum deposits underground.
Reason: Impervious rocks prevent petroleum migration upwards, allowing it to accumulate in reservoirs.
Answer: Both A and R are true, and R is the correct explanation of A.