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

Concept: Metallurgy involves purification of metals after extraction from ores. Different metals are purified by different refining techniques depending on their chemical properties and volatility of compounds formed. Two important refining methods are:
• Mond Process
• Van Arkel Process Mond process depends upon formation of volatile metal carbonyl compounds. Van Arkel process depends upon formation of volatile metal iodides.

Step 1: Understand Mond Process. Mond process is specifically used for purification of nickel. Nickel reacts with carbon monoxide at moderate temperature. Reaction: \[ Ni+4CO\rightarrow Ni(CO)_4 \] Nickel tetracarbonyl formed is volatile. On heating at higher temperature: \[ Ni(CO)_4\rightarrow Ni+4CO \] Pure nickel is obtained. Thus metal X is \[ Ni \]

Step 2: Understand Van Arkel Process. Van Arkel process is used for purification of metals like titanium and zirconium. Metal reacts with iodine. Example: \[ Zr+2I_2\rightarrow ZrI_4 \] Volatile zirconium tetraiodide forms. At hot tungsten filament: \[ ZrI_4\rightarrow Zr+2I_2 \] Pure zirconium obtained. Thus metal Y is \[ Zr \]

Step 3: Compare with options. Required pair becomes \[ X=Ni,\qquad Y=Zr \] Hence correct answer is \[ \boxed{D} \]