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?

Correct Option The correct option is 2 and 3 only. Explanation Coal processing yields multiple by-products, including coke, coal tar, and coal gas, each with distinct physical properties and industrial uses. Statement-wise Analysis - Statement 1: Incorrect. Coke is a hard, porous, solid substance with high carbon content, not a soft or liquid material. - Statement 2: Correct. Coal tar is a complex mixture containing approximately 200 chemical substances derived from coal distillation. - Statement 3: Correct. Coal gas is released as a by-product during the destructive distillation of coal carried out to obtain coal tar. Key Takeaway: Coal distillation produces solid coke, liquid coal tar, and gaseous coal gas, each with distinct physical characteristics and industrial significance.

NCERT Class 8 Science — Chapter 1: Coal and petroleum

mcqmedium

With reference to the products obtained from coal, consider the following statements:

Coke is a tough, porous, and black substance which is an almost pure form of carbon.
Coal tar is a pure substance containing only carbon.
Coal gas is obtained during the processing of coal to get coal tar.

Which of the statements given above is/are correct?

Official previous-year question

Verified 1 Aug 2026.

Options

A1 and 2 only
B2 only
C1 and 3 only
D1, 2 and 3

Did you get this right?

Solution

Correct Option

The correct option is 2 and 3 only.

Explanation

Coal processing yields multiple by-products, including coke, coal tar, and coal gas, each with distinct physical properties and industrial uses.

Statement-wise Analysis

Statement 1: Incorrect. Coke is a hard, porous, solid substance with high carbon content, not a soft or liquid material.
Statement 2: Correct. Coal tar is a complex mixture containing approximately 200 chemical substances derived from coal distillation.
Statement 3: Correct. Coal gas is released as a by-product during the destructive distillation of coal carried out to obtain coal tar.

Key Takeaway: Coal distillation produces solid coke, liquid coal tar, and gaseous coal gas, each with distinct physical characteristics and industrial significance.

Your note

More from Chapter 1: Coal and petroleum

Which of the following is NOT a constituent of petroleum?

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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?

medium

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?

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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?

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

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Keep practising Chapter 1: Coal and petroleum

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Correct Option

The correct option is 2 and 3 only.

Explanation

Coal processing yields multiple by-products, including coke, coal tar, and coal gas, each with distinct physical properties and industrial uses.

Statement-wise Analysis

Statement 1: Incorrect. Coke is a hard, porous, solid substance with high carbon content, not a soft or liquid material.
Statement 2: Correct. Coal tar is a complex mixture containing approximately 200 chemical substances derived from coal distillation.
Statement 3: Correct. Coal gas is released as a by-product during the destructive distillation of coal carried out to obtain coal tar.

Key Takeaway: Coal distillation produces solid coke, liquid coal tar, and gaseous coal gas, each with distinct physical characteristics and industrial significance.