is this D? What does the process of froth flotation help to achieve?

A. It crushes the ore to make contact with metallic compounds easier.
B. It decreases the ratio of metal in the ore.
C. It makes the metal lighter.
D. It increases the concentration of metal in the ore.

Question

is this D? What does the process of froth flotation help to achieve?

 		A.	It crushes the ore to make contact with metallic compounds easier.
 		B.	It decreases the ratio of metal in the ore.
 		C.	It makes the metal lighter.
 		D.	It increases the concentration of metal in the ore.

australopithecus · Answer

https://en.wikipedia.org/wiki/Froth_flotation

australopithecus · Answer

"Froth flotation is a process for separating minerals from gangue by taking advantage of differences in their hydrophobicity. Hydrophobicity differences between valuable minerals and waste gangue are increased through the use of surfactants and wetting agents. The selective separation of the minerals makes processing complex (that is, mixed) ores economically feasible. The flotation process is used for the separation of a large range of sulfides, carbonates and oxides prior to further refinement. Phosphates and coal are also upgraded (purified) by flotation technology."

I'm pretty sure it is D

What class is this for?

anonymous · Answer

AP chemistry lol such a stupid question though idk why it's in this practice sheet

australopithecus · Answer

It is interesting as it is pretty important, I mean we would be pretty boned without it.