Question

The earthy impurities present in the mineral are called.
A) Flux.
B) Slag.
C) Gangue.
D) Refractory material.

Answer 1

We Know that Impurities like sand, mud, etc. are earthy impurities and are called gangue. Gangue is a component obtained during the process of an electrolysis involving the anode mud.

Complete step by step answer:
Now, we see what gangue is.
The waste materials which are accompanied with minerals while extracting are called Gangue particles. It is earthly impurities and does not have any electrical or magnetic properties.
Gangue has no value in the market and it is waste rock or sand or soil. It is present along with minerals in the ore deposit from which the metal is to be extracted. Gangue is different from the waste rock which is present above the ore deposit. The pieces of rocks which are already stripped of by natural process are called tailings.
Therefore, the option C is correct.
Let us discuss the other options.
Flux is the chemical substance used to convert impurities which are not easily removable (gangue) into slag.
Therefore, the option A is incorrect.
Slag is the substance which is easily removable when gangue and flux are combined.
Therefore, the option B is incorrect.
Refractory materials are the materials which are resistant to decomposition by heat, pressure, or chemical attack, and retain strength and structure at high temperatures.
Therefore, the option D is incorrect.

So, the correct answer is Option C .

Note:
Let us see some main difference between gangue and anode mud.
The insoluble impurity which collects as residue at the anode while extracting the minerals through electrolytic refining is called anode mud while the impurities found along with minerals are called gangue.