Q.

Coal gas is attained from to a process carried out at                  

A. 300oc
B. 700oc
C. 900oc
D. 1300oc
Answer» D. 1300oc
Explanation: coal gas is produced by heating the coal at 1300oc when there is a lack of air. it is usually done in coke ovens or gas making retorts. this gas is colorless and is lighter than air.
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