Assertion : Coke and flux are used in smelting.

Reason : The phenomenon in which ore is mixed with suitable flux and coke is heated to fusion is known as smelting.

Give the correct order of initials $T$ or $F$ for following statements. Use $T$ if statement is true and $F$ if it is false.

$(i)$ $Cu$ metal is extracted from its sulphide ore by reduction of $Cu_2O$ with $FeS.$

$(ii)$ An ore of Tin containing $FeCrO_4$ is concentrated by magnetic separation method.

$(iii)$ Auto reduction process is used in the extraction of $Cu\, \& \,Hg.$

$(iv)$ Cassiterite and Rutile are oxide ores of the metals.

Which of the following ore contains both iron and copper.

Match List $-I$ with List $-II$

In the extraction of aluminium 

process $X$ : applied for red bauxite to remove iron oxide (chief impurity)

process $Y$ : (Serpeck's process) : applied for white bauxite to remove $Z$ (chief impurity) then,

process $X$ and impurity $Z$ are