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

$(i)$  In Gold schmidt thermite process aluminium acts as a reducing agent .

$(ii)$  $Mg$ is extracted by electrolysis of aq. solution of $MgCl_2$

$(iii)$  Extraction of $Pb$ is possible by carbon reduction method

$(iv)$  Red Bauxite is purified by Serpeck's process

Consider the following metallurgical processes

$(i)$ Heating impure metal with $CO$ and distilling the resulting volatile carbonyl (boiling point $43\,^oC$) and finally decomposing at $150\,^oC$ to $200\,^oC$ to get the pure metal.

$(ii)$ Heating the sulphide ore in air until a part is converted to oxide and then further  heating in the absence of air to let the oxide react with unchanged sulphide.

$(iii)$ Electrolysing the molten electrolyte containing approximately equal amounts of  the metal chloride and $CaCl_2$ to obtain the metal. 

The process used for obtaining sodium, nickel and copper are, respectively,

Boron can be obtained by various methods but not by :

Consider following statements Correct statements are

$(i)$ Froth floatation technique is used to concentrate sulphide ore.
$(ii)$ Froth floatation technique is based upon differential wettability of ore and impurity in water.
$(iii)$ Red Bauxite is concentrated by Bayer’s process
$(iv)$ Carbon is used as reducing agent during extraction of zinc from zinc blende.