Question

Which of the following reactions represent correct method?

• A. $NaC{l}_{\left(molten\right)}⟶N{a}^{+}+C{l}^{\ominus }$ : Down cell
• B. $Ni(CO{)}_4⟶Ni+4CO$ : Mond process
• C. $A{g}_{2}C{O}_3⟶2Ag+C{O}_2+\frac{1}{2}{O}_2$ : Van Arkel method
• D. $Zr{I}_4⟶Zr+2I_2$ : Van Arkel method

Answer 1

Answer: (A), (B), (D)

The correct options are
A $NaC{l}_{\left(molten\right)}⟶N{a}^{+}+C{l}^{\ominus }$ : Down cell
B $Ni(CO{)}_4⟶Ni+4CO$ : Mond process
D $Zr{I}_4⟶Zr+2I_2$ : Van Arkel method

In the Down cell, the electrolyte is sodium chloride that has been heated to the liquid state. Although solid sodium chloride is a poor conductor of electricity, when molten the sodium and chloride ions are mobilized, which become charge carriers and allow conduction of electric current.

$NaC{l}_{\left(molten\right)}⟶N{a}^{+}+C{l}^{\ominus }$

The Mond process, sometimes known as the carbonyl process is a technique created by Ludwig Mond in 1890 to extract and purify nickel. The process was used commercially before the end of the 19th century. This process converts nickel oxides into pure nickel.

$Ni(CO{)}_4⟶Ni+4CO$

The crystal bar process is also known as the iodide process or the Van Arkel process. This process was the first industrial process for the commercial production of pure ductile metallic Zirconium. It is used in the production of small quantities of ultra-pure titanium and zirconium.

$Zr{I}_4⟶Zr+2I_2$

Hence options A, B & D are correct.