In the process of extraction of iron from iron pyrite ore, which of the following process is/are used for concentration of ore?

Magnetic separation.

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Gravity separation.

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Froth flotation.

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Leaching.

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Solution

The correct options are
A Magnetic separation.
C Froth flotation.
Chemically, iron pyrite is ${FeS}_{2}$ .
Magnetic separation is applicable when either the ore particles or the impurities are magnetic (attracted by a magnet) in nature.
In case of iron pyrite the ore particles are magnetic in nature hence it can be concentrated using magnetic separation.

Also as the formula ${FeS}_{2}$ suggests - does have sulphur atoms. Froth floatation is mainly used for sulphide ores. So, we can definitely use froth flotation process for concentration.

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