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  • Assertion: Sulphide ores are concentrated by Froth Flotation method. Reason: Cresols stabilise the froth in the Froth Flotation Method.

In the following question, a statement of assertion followed by a statement of reason is given. Choose the correct answer out of the following choices.

Assertion: Sulphide ores are concentrated by Froth Flotation method.

Reason: Cresols stabilise the froth in the Froth Flotation Method.

(i) Both assertion and reason are true and the reason is the correct explanation of assertion.

(ii) Both assertion and reason are true but the reason is not the correct explanation of assertion.

(iii) The assertion is true but the reason is false.

(iv) The assertion is false but the reason is true.

(v) Assertion and reason both are wrong.

Answers (1)

The answer is the option (ii). Sulphide ores on being wetted by oil, becomes lighter and rises to the surface along with froths. On the other hand, impurities wetted by water settle down as they get heavier.

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