Question

The metal refined by Mond process is X and the metal refined by Van Arkel method is Y. What are X and Y respectively?

• A. Mn, Ga
• B. In, Zr
• C. Ti, Ni
• D. Ni, Zr

Hint:

Mond Process → Nickel purification. Van Arkel Process → Titanium and Zirconium purification.

Answer 1

The Correct Option is D

Step 1: Recall the basis of the Mond process.
The Mond process refines a metal through a volatile carbonyl. The metal must form an easily decomposed carbonyl with carbon monoxide.
Step 2: Identify metal X.
Nickel does exactly this: $Ni+4CO \rightarrow Ni(CO)_4$ at moderate temperature, and on heating $Ni(CO)_4 \rightarrow Ni+4CO$ releases pure nickel. So $X=Ni$.
Step 3: Recall the basis of the Van Arkel method.
The Van Arkel method refines a metal through a volatile iodide that decomposes on a hot filament. It is used for very pure titanium and zirconium.
Step 4: Identify metal Y.
For zirconium: $Zr+2I_2 \rightarrow ZrI_4$, and on a hot tungsten filament $ZrI_4 \rightarrow Zr+2I_2$ deposits pure zirconium. So $Y=Zr$.
Step 5: Eliminate the wrong options.
Pairs like Mn/Ga, In/Zr, or Ti/Ni do not match a carbonyl based Mond metal with an iodide based Van Arkel metal in the right order, so they are rejected.
Step 6: Choose the correct pair.
$X=Ni$ and $Y=Zr$ matches option (4).
\[ \boxed{X=Ni,\ \ Y=Zr\ \ \text{(Option 4)}} \]