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A furnace lined with Haematite is used to convert cast iron to wrought iron

Collectors enhance the wettability of mineral particles during froth floatation

Copper from it’s low grade ore is extracted by hydrometallurgy

In vapour phase refining, metal should form a volatile compound

answer is B.

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Detailed Solution

Collectors are anionic sulphur ligands which decrease the wettability of mineral particles during froth floatation.

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