Question

Match the items of Column $\left(I\right)$ with the items of Column $\left(II\right)$ and assign the correct code:

$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \left(A\right)& \text{Coloured bands}& \left(I\right)& \text{Zone refining}\\ \left(B\right)& \text{Impure metal to volatile complex}& \left(II\right)& \text{Fractional distillation}\\ \left(C\right)& \text{Purification of}Ge\text{and}si& \left(III\right)& \text{Mond Process}\\ \left(D\right)& \text{Purification of mercury}& \left(IV\right)& \text{Chromatography}\\ & & \left(V\right)& \text{Liquation}\end{array}$

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

Answer 1

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

$\text{Correct match}$

$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \left(A\right)& \text{Coloured bands}& \left(IV\right)& \text{Chromatography}\\ \left(B\right)& \text{Impure metal to volatile complex}& \left(III\right)& \text{Mond Process}\\ \left(C\right)& \text{Purification of}Ge\text{and}si& \left(I\right)& \text{Zone refining}\\ \left(D\right)& \text{Purification of mercury}& \left(II\right)& \text{Fractional distillation}\end{array}$

Part (A)

Coloured bands are observed in chromatography.

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



Part (B)

In the Mond process for refining metal, impure metal is converted to a volatile complex. It is then decomposed to obtain pure metal. This process converts nickel oxides into nickel metal with very high purity being attainable in just a single step.

$Ni+4CO\stackrel{330-250K}{\to }Ni(CO{)}_4$
$Impure$

$Ni(CO{)}_4\stackrel{450-470K}{\to }Ni+4CO$
$Pure$

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

Part (C)

Zone refining method is used to purify semiconductors like $Ge,Si$.
It is based on the principle that impurities are more soluble in melt than in solid state of metal.

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

Part (D)

Purification of mercury is done by fractional distillation method.
This method is useful for purifying metal having low boiling point. In this method the impure metal is evaporated to obtain the pure metal as distillate.

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