Assertion : Copper obtained after bassemerization is known as blister copper.

Reason : Blisters are produced on the surface of the metal due to escaping of dissolved $SO_2$.

Zone refining is based on the principle of

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

Percentage $(\%)$ of silver in the alloy gennan silver is

$FeC{r_2}{O_4}$ (chromite) is converted to $Cr$ by following steps :

Chromite $\xrightarrow{I}NaCr{O_4}\,\,\xrightarrow{{II}}\,C{r_2}{O_3}\,\xrightarrow{{III}}\,Cr$

Reagents in $I,\,II$ and $III$ step might be

$I-$ Step   $-$   $II-$ Step   $-$ $III-$ Step