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Which of the following is not an impurity generally present in crude metals?

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in Chemistry – Class 12 by (188k points)
Which of the following is not an impurity generally present in crude metals?

(a) Other metals

(b) Non-metals

(c) Unreacted oxides

(d) Pine oil

This question was posed to me in an online quiz.

My question is taken from Refining in portion General Principles and Processes of Isolation of Elements of Chemistry – Class 12

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Best answer
Correct option is (d) Pine oil

The best I can explain: The impurities generally present in crude metals consist of other metals, formed by reduction of their respective oxides present in the ore, non-metals such as silicon and phosphorus, unreacted oxides and sulphides of the metals and substances taken up in the furnace such as slag.

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