Question

Match items of column I with the items of column II and assign the correct code :

$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \left(a\right)& \text{Cyanide process}& \left(i\right)& \text{Ultrapure Ge}\\ \left(b\right)& \text{Froth floatation process}& \left(ii\right)& \text{Dressing of ZnS}\\ \left(c\right)& \text{Electrolytic reduction}& \left(iii\right)& \text{Extraction of Al}\\ \left(d\right)& \text{Zone refining}& \left(iv\right)& \text{Extraction of Au}\\ & & \left(v\right)& \text{Purification of Ni}\end{array}$

• A. $\begin{array}{cccc}\left(a\right)& \left(b\right)& \left(c\right)& \left(d\right)\\ \left(iv\right)& \left(ii\right)& \left(iii\right)& \left(i\right)\end{array}$
• B. $\begin{array}{cccc}\left(a\right)& \left(b\right)& \left(c\right)& \left(d\right)\\ \left(ii\right)& \left(iii\right)& \left(i\right)& \left(v\right)\end{array}$
• C. $\begin{array}{cccc}\left(a\right)& \left(b\right)& \left(c\right)& \left(d\right)\\ \left(iii\right)& \left(iv\right)& \left(v\right)& \left(i\right)\end{array}$
• D. $\begin{array}{cccc}\left(a\right)& \left(b\right)& \left(c\right)& \left(d\right)\\ \left(i\right)& \left(ii\right)& \left(iii\right)& \left(iv\right)\end{array}$

Answer 1

The correct option is A $\begin{array}{cccc}\left(a\right)& \left(b\right)& \left(c\right)& \left(d\right)\\ \left(iv\right)& \left(ii\right)& \left(iii\right)& \left(i\right)\end{array}$

$a.$ Cyanide process is used to extract and $Au$ in hydrometallurgy.
$b.$ Froth floatation process is used for dressing of sulfide ores.
$c.$ Electrolytic reduction is used to extract $Al$
$d.$ Zone refinining process is used for obtaining ultrapure $Ge$.