Solve this multiple-choice question and choose the correct option.

ConceptCarbonisation of coal (coking) is the strong heating of coal in the absence of air to drive off volatiles and obtain coke. The options given describe other operations: (a) Pulverisation (size reduction), not carbonisation. (b) Briquetting (agglomeration), not carbonisation. (c) Refers to wood (charcoal making) at relatively low temperature; the question is about coal. Final AnswerNone of the above

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Carbonisation of coal: identify the correct description of the process Select the statement that correctly defines carbonisation of coal (coke-making by heating coal in the absence of air). Choose the correct option.

Difficulty: Easy

Drying and crushing coal to a fine powder
Moulding finely ground coal under pressure with or without a binder
Heating wood with limited air to temperatures not less than 280°C
None of the above

Correct Answer: None of the above

Explanation:

ConceptCarbonisation of coal (coking) is the strong heating of coal in the absence of air to drive off volatiles and obtain coke. The options given describe other operations:

(a) Pulverisation (size reduction), not carbonisation.
(b) Briquetting (agglomeration), not carbonisation.
(c) Refers to wood (charcoal making) at relatively low temperature; the question is about coal.

Carbonisation of coal: identify the correct description of the process Select the statement that correctly defines carbonisation of coal (coke-making by heating coal in the absence of air). Choose the correct option.

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