Question

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

$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \left(A\right)& \text{Sapphire}& \left(I\right)& A{l}_2{O}_3\\ \left(B\right)& \text{Sphalerite}& \left(II\right)& NaCN\\ \left(C\right)& \text{Depressant}& \left(III\right)& Co\\ \left(D\right)& \text{Corundum}& \left(IV\right)& ZnS\\ & & \left(V\right)& F{e}_2{O}_3\end{array}$

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

Answer 1

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

$\text{Correct match}$

$\begin{array}{cccc}& \text{Column I}& & \text{Column II}\\ \left(A\right)& \text{Sapphire}& \left(III\right)& Co\\ \left(B\right)& \text{Sphalerite}& \left(IV\right)& ZnS\\ \left(C\right)& \text{Depressant}& \left(II\right)& NaCN\\ \left(D\right)& \text{Corundum}& \left(I\right)& A{l}_2{O}_3\end{array}$

Part (A):

Sapphire is a gemstone containing cobalt as impurities.

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

Part (B):

Molecular formula of Sphalerite is $ZnS$.

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

Part (C):

$NaCN$ is used as a depressant in froth floatation method for concentration of ores.

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

Part (D):

Molecular formula of Corundum is $A{l}_2{O}_3$. It is an ore of Aluminium.

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