NCERT Class 8 Science — Chapter 1: Coal and petroleum

With reference to the products obtained from coal, consider the following statements: 1. Coke is a tough, porous, and black substance which is an almost pure form of carbon. 2. Coal tar is a pure substance containing only carbon. 3. Coal gas is obtained during the processing of coal to get coal tar. Which of the statements given above is/are correct?

The term ‘Carbonisation’ is best described by which of the following?

What is the primary environmental advantage of using Compressed Natural Gas (CNG) for transport vehicles?

Which natural process is primarily attributed to the burying of dense forests that eventually led to the formation of coal?

Which of the following is NOT a constituent of petroleum?

Naphthalene balls, commonly used as moth repellents, are derived from which of the following?

What is a primary application of Paraffin wax obtained from petroleum refining?

In the context of petroleum fractionation, what is the primary function of the lubricating oil fraction?

In the context of subterranean reservoirs, which of the following correctly describes the stratification of petroleum and natural gas?

Which of the following correctly describes the physical properties of crude petroleum?

Which of the following statements about the formation of fossil fuels is correct? 1. It is a slow process taking millions of years. 2. It can be easily replicated in a laboratory at room temperature. 3. It involves the decomposition of dead organisms. Select the correct answer using the code given below:

The geological process of converting dense forests into coal deposits is primarily associated with which time period?

Which of the following fuels is primarily used for heavy commercial vehicles like trucks and tractors?

In the context of petroleum deposits, what is the characteristic of the rock layer typically found immediately above the oil reservoir?

Which one of the following is the primary gaseous product formed during the complete combustion of coal in air?

For which one of the following applications is diesel fuel primarily used?

With reference to the products obtained from coal, consider the following statements: 1. Coke is a tough, porous, and black substance which is an almost pure form of carbon. 2. Coal tar is a pure substance containing only carbon. 3. Coal gas is obtained during the processing of coal to get coal tar. Which of the statements given above is/are correct?

In India, natural gas has been found in which of the following regions? 1. Tripura 2. Rajasthan 3. Maharashtra 4. Krishna Godavari delta Select the correct answer using the code given below:

Which of the following best explains why coal produces mainly carbon dioxide gas when heated in air?

The industrial process of separating the various constituents or fractions of petroleum is termed:

Which one of the following petroleum products is primarily used for the metalling of roads?

Which of the following petroleum fractions has traditionally been used as a solvent for dry cleaning?

Consider the following statements regarding the formation of coal: 1. It was formed from dense forests in low-lying wetland areas about 300 million years ago. 2. The process involved the burial of forests under soil, where they decomposed completely into compost. 3. The conversion of dead vegetation into coal occurred under conditions of low pressure and low temperature. Which of the statements given above are correct?

Consider the following statements regarding Coal Tar: 1. It is a mixture of various substances. 2. It is used to make food preservatives. 3. It is used to make edible oils. Which of the statements given above are correct?

With reference to the uses of petroleum constituents, consider the following pairs: 1. LPG | Fuel for home and industry 2. Petrol | Fuel for heavy motor vehicles 3. Diesel | Fuel for electric generators Which of the pairs given above is/are correctly matched?

With reference to the occurrence of petroleum, how do the densities of oil and gas compare to that of water?

With reference to the constituents of petroleum, consider the following statements: 1. Kerosene is primarily used as a fuel for heavy motor vehicles. 2. Lubricating oil is used for lubrication. 3. Paraffin wax is used in ointments and candles. Which of the statements given above is/are correct?

Consider the following statements about Coal Gas: 1. It was used for street lighting for the first time in London in 1950. 2. Nowadays, it is primarily used as a source of heat rather than light. 3. It is used as a fuel in industries situated near coal processing plants. Which of the statements given above is/are correct?

Which one of the following characteristics describes the odour of coal tar?

The Petroleum Conservation Research Association (PCRA) in India advises people to save petrol/diesel by adopting which of the following measures? 1. Drive at a constant and moderate speed. 2. Switch off the engine at traffic lights. 3. Ensure correct tyre pressure. 4. Ensure regular maintenance of the vehicle. Select the correct answer using the code given below:

Etymologically, the term 'Petroleum' refers to oil derived from:

Consider the following statements regarding the formation of petroleum: 1. It is formed from the remains of vegetation on land. 2. It is formed from organisms living in the sea. Which of the statements given above is/are correct?

The term ‘Carbonisation’ is best described by which of the following?

Consider the following statements regarding the conservation of fossil fuels: 1. Fossil fuels can be prepared in a laboratory from dead organisms if high temperature is provided. 2. Burning of fossil fuels is a major cause of air pollution and global warming. 3. The known reserves of coal and petroleum are limited and will last for a few hundred years. Which of the statements given above is/are correct?

Which of the following statements regarding the uses of Coal Tar is NOT correct?

Consider the following statements regarding the environmental impact of fossil fuels: 1. Their use helps in reducing the global temperature. 2. Their burning results in air pollution. 3. Their availability is limited to a few hundred years. Which of the statements given above are correct?

Hydrogen gas, used in the production of fertilisers (urea), is obtained from which natural resource?

What is the significance of high temperature and high pressure in the geological formation of coal?

Which of the following is obtained from natural gas and used in the production of urea?

Consider the following statements: 1. Sunlight is an inexhaustible natural resource. 2. Air is an exhaustible natural resource. 3. Water is a renewable natural resource. Which of the statements given above is/are correct?

Which of the following substances is obtained during the processing of coal to get coke?

With reference to the formation of petroleum, consider the following statements: 1. It was formed from organisms living in the sea. 2. The formation process required the presence of air to decompose the organic matter. 3. Low temperature and low pressure transformed the dead organisms into petroleum. Which of the statements given above is/are correct?

With reference to fossil fuels, consider the following statements: 1. They are formed from the dead remains of living organisms. 2. Coal and petroleum are fossil fuels, but natural gas is not. 3. They are classified as exhaustible natural resources. Which of the statements given above is/are correct?

What is the primary reason petroleum is often referred to as ‘black gold’?

Which one of the following elements constitutes the primary component of coal?

Consider the following statements: 1. Coal is a soft, white substance. 2. Coal is black in colour. 3. Coal was used in railway engines to produce steam. Which of the statements given above are correct?

With reference to natural resources, consider the following statements: 1. Inexhaustible natural resources are those whose quantity is limited by human consumption. 2. Forests and wildlife are classified as exhaustible natural resources. 3. Minerals and natural gas are examples of exhaustible natural resources. Which of the statements given above is/are correct?

Consider the following statements regarding the history of oil drilling: 1. The world’s first oil well was drilled in Pennsylvania, USA. 2. In India, oil was first struck at Bombay High. 3. Oil is found in India in the river basins of Godavari and Krishna. Which of the statements given above are correct?

Which of the following is/are obtained from 'Petrochemicals'? 1. Synthetic fibres like polyester and nylon 2. Cotton and Jute 3. Natural rubber Select the correct answer using the code given below:

With reference to Natural Gas, consider the following statements: 1. It is stored under high pressure as Compressed Natural Gas (CNG). 2. It cannot be used directly for burning in homes through pipes. 3. It is used as a starting material for the manufacture of chemicals and fertilisers. Which of the statements given above is/are correct?

Which of the following pairs is correctly matched regarding the constituents of petroleum and their uses?

Consider the following statements regarding the physical properties of Coal Tar: 1. It is a solid substance at room temperature. 2. It has an unpleasant smell. 3. It is a black liquid. Which of the statements given above is/are correct?

Consider the following statements about Coke: 1. It is a tough, porous, and black substance. 2. It is primarily used in the manufacture of plastic. 3. It is used in the extraction of non-metals like sulphur only. Which of the statements given above are correct?

Consider the following statements about Natural Gas: 1. It is easy to transport through pipes. 2. It produces more pollutants than petrol and diesel. 3. It is found exclusively in volcanic craters. Which of the statements given above are correct?

Which of the following pairs is correctly matched regarding the constituents of petroleum and their uses?

With reference to the formation of petroleum, consider the following statements: 1. It was formed from organisms living in the sea. 2. The formation process required the presence of air to decompose the organic matter. 3. Low temperature and low pressure transformed the dead organisms into petroleum. Which of the statements given above is/are correct?

With reference to the constituents of petroleum, consider the following statements: 1. Kerosene is primarily used as a fuel for heavy motor vehicles. 2. Lubricating oil is used for lubrication. 3. Paraffin wax is used in ointments and candles. Which of the statements given above is/are correct?

Which one of the following characteristics describes the odour of coal tar?

Consider the following statements regarding the formation of petroleum: 1. It is formed from the remains of vegetation on land. 2. It is formed from organisms living in the sea. Which of the statements given above is/are correct?

With reference to the occurrence of petroleum, how do the densities of oil and gas compare to that of water?

In India, natural gas has been found in which of the following regions? 1. Tripura 2. Rajasthan 3. Maharashtra 4. Krishna Godavari delta Select the correct answer using the code given below:

What is the primary reason petroleum is often referred to as ‘black gold’?

With reference to the uses of petroleum constituents, consider the following pairs: 1. LPG | Fuel for home and industry 2. Petrol | Fuel for heavy motor vehicles 3. Diesel | Fuel for electric generators Which of the pairs given above is/are correctly matched?

Consider the following statements about Coal Gas: 1. It was used for street lighting for the first time in London in 1950. 2. Nowadays, it is primarily used as a source of heat rather than light. 3. It is used as a fuel in industries situated near coal processing plants. Which of the statements given above is/are correct?

Which of the following is NOT a constituent of petroleum?

Which of the following correctly describes the physical properties of crude petroleum?

With reference to Natural Gas, consider the following statements: 1. It is stored under high pressure as Compressed Natural Gas (CNG). 2. It cannot be used directly for burning in homes through pipes. 3. It is used as a starting material for the manufacture of chemicals and fertilisers. Which of the statements given above is/are correct?

Which of the following is/are obtained from 'Petrochemicals'? 1. Synthetic fibres like polyester and nylon 2. Cotton and Jute 3. Natural rubber Select the correct answer using the code given below:

Consider the following statements: 1. Sunlight is an inexhaustible natural resource. 2. Air is an exhaustible natural resource. 3. Water is a renewable natural resource. Which of the statements given above is/are correct?

In the context of subterranean reservoirs, which of the following correctly describes the stratification of petroleum and natural gas?