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Which of the following is used for the removal of impurities by heavy media separation in industries?

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in Engineering Chemistry II by (789k points)
Which of the following is used for the removal of impurities by heavy media separation in industries?

(a) Magnetite

(b) Zinc chloride

(c) Bromoform

(d) Carbon Tetrachloride

I had been asked this question in a national level competition.

Query is from Coal Technology in chapter Fuels and Combustion of Engineering Chemistry II

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The correct option is (a) Magnetite

To explain: For laboratory we can use zinc chloride but for industrial process we have to use magnetite or fine grains of sand. This is due to cost factor and properties of both of them at large scale.

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