Chemistry - Metallurgy Question with Solution | TestHub

(A) Correct: Brass (Cu + Zn), Bronze (Cu + Sn), and Coinage metals (Cu-based alloys) are associated with copper alloys.

(B) Correct: Froth flotation can be used for some non-sulphide ores after adding an activator, which converts the surface into a sulphide-like layer.

(C) Correct: Magnetic separation is used to separate magnetic wolframite (FeWO₄ + MnWO₄) from non-magnetic cassiterite (SnO₂).

(D) Incorrect: Cresol acts as a frother, not a stabilizer, and froth flotation works on the principle of adsorption, not absorption.

Answer: (A), (B) and (C)