Destructive distillation of coal gives a thick black liquid with an unpleasant smell, called ________ which is used for _______.
A
coke; metal extraction
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B
coal tar; surfacing of roads
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C
coal tar; power generation
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D
coke; power generation
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Solution
The correct option is B coal tar; surfacing of roads Coal tar is a thick black liquid which has an unpleasant smell and contains a mixture of carbonaceous substance. It is a derivative of coal obtained by destructive distillation and is mainly used for the surfacing of roads.