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Question

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.

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