Q99
Coke is produced
A.
When coal is strongly heated continuously for 42 to 48 hours in the absence of air in a closed vessel
AnswerB.
From the finely ground coal by moulding under pressure with or without a binding material
C.
When coal is first dried and then crushed to a fine powder by pulverizing machine
D.
By heating wood with a limited supply of air to a temperature not less than 280°C
Answer: Option A
Solution
Answer: Option A
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