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. $A\left(III\right)B\left(IV\right)C\left(V\right)D\left(I\right)$
• B. $A\left(IV\right)B\left(II\right)C\left(III\right)D\left(I\right)$
• C. $A\left(I\right)B\left(II\right)C\left(III\right)D\left(IV\right)$
• D. $A\left(II\right)B\left(III\right)C\left(I\right)D\left(V\right)$

Answer 1

The correct option is B $A\left(IV\right)B\left(II\right)C\left(III\right)D\left(I\right)$

$\text{Correct match}$

$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \left(A\right)& \text{Cyanide process}& \left(IV\right)& \text{Extraction of}Au\\ \left(B\right)& \text{Froth Floatation Process}& \left(II\right)& \text{Dressing of}ZnS\\ \left(C\right)& \text{Electrolytic reduction}& \left(III\right)& \text{Extraction of}Al\\ \left(D\right)& \text{Zone refining}& \left(I\right)& \text{Ultrapure}Ge\end{array}$

Part (A)

Cyanide process is used for extraction of gold and silver.

$\left(A\right)\to \left(IV\right)$

Part (B)

Froth floatation process is used to concentrate sulphide ores.

This method is used for removing gangue from sulphide ores.

$\left(B\right)\to \left(II\right)$

Part (C)

Electrolytic reduction is used for the extraction of aluminium.

The electrolytic process for extraction of aluminium is called Hall-Heroult process. Highly reactive metals such as alkali metals, alkaline earth metals and aluminium are extracted using electrolytic reduction.

$\left(C\right)\to \left(III\right)$

Part (D)

Zone refining method is used to purify semiconductors like $Ge$.

It is based on the principle that impurities are more soluble in melt than in solid state of metal.

$\left(D\right)\to \left(I\right)$