The thick black liquid with an unpleasant smell is a product of coal and is called ___(i)___ . It is used in the manufacturing of ____(ii)_____ .
The information in which alternative completes the given statements?
A
(i) Coke
(ii) Steel
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B
(i) Coke
(ii) Naphthalene balls
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C
(i) Coal tar
(ii) Steel
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D
(i) Coal tar
(ii) Naphthalene balls
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Solution
The correct option is D (i) Coal tar
(ii) Naphthalene balls Coal tar is one of the three products of coal. The other products of coal are coke and coal gas. Coal tar is a thick, black liquid. It has a very unpleasant smell. It is used in the manufacturing industry on a large scale. Naphthalene balls are obtained from coal tar. The correct answer is d.