A) a furnace lined with Haematite is used to convert cast iron to wrought, iron.
B) collectors enhance the wettability of mineral particles during froth flotation.
C) in vapour phase refining, metal should form a volatile compound.
D) copper from its low grade ores is extracted by hydrometallurgy
Correct Answer: B
Solution :
: Collectors enhance the non-wettability of mineral particles by adsorbing on mineral particle surface and forming a thin film of hydrophobic hydrocarbon, so it greatly increases the contact angle hence, bubbles will adhere to the surface.
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