Which of the following are sulphate ores?

Cinnabar

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Gypsum

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Galena

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Iron pyrite

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Solution

The correct option is B Gypsum
Sulphate ores are Gypsum $(C a S O_{4} .2 H_{2} O)$ , Epsom Salt $(M g S O_{4} .7 H_{2} O)$ , Barytes $(B a S O_{4})$ and Anglesite $(P b S O_{4})$ .
Cinnabar is a mercury sulfide mineral with a chemical composition of $H g S$ .
Galena is the natural mineral form of lead(II) sulfide $(P b S)$ .
Iron pyrite, is an iron sulfide with the chemical formula $(F e S_{2})$ .

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

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