Question

Flux is used to remove:
A.Basic impurities
B.Acidic impurities
C.Both acidic and basic impurities
D.None of these

Answer 1

Hint:This question gives the knowledge about the flux. Flux is the chemical species which can act as a flowing agent, cleaning agent or a purifying agent. They are used in the process of metal joining and to extract metals from their ores.

Complete step by step answer:
Fluxes are used to remove both the acidic and basic impurities. Acidic fluxes are used to eliminate the basic unwanted substances or impurities whereas basic fluxes are used to eliminate the acidic unwanted substances or impurities.
Therefore, option $3$ is the correct option.

Additional information:
Flux is the chemical species which can act as a flowing agent, cleaning agent or a purifying agent. They are used in the process of metal joining and to extract metals from their ores. Fluxes are generally added during the process of extraction of metal. When flux is heated, they generally react with the gangue particles to form molten mass which is known as slag. Flux can be basic or acidic in nature.
Examples of flux are borax, coke, sodium carbonate, lead sulfide and so forth.
Properties of flux are as follows:
$1$. The fluxes which are highly active are generally corrosive or acidic in nature.
$2$. Some fluxes are hygroscopic in nature as they absorb water very easily from the surroundings very readily.
$3$. Fluxes can act as a flowing agent, cleaning agent or a purifying agent.
$4$. Fluxes help in conducting current or electricity.

Note:
Always remember that the flux is the chemical species which can act as a flowing agent, cleaning agent or a purifying agent. Fluxes are hygroscopic in nature as they absorb water very easily from the surroundings very readily.