Easy MCQ +4 / -1 PYQ · JEE Mains 2023

The reaction representing the Mond process for metal refining is _________.

  1. A $\mathrm{ZnO+C\buildrel \Delta \over \longrightarrow Zn+CO}$
  2. B $$\mathrm{2K[Au(CN)_2]+Zn\buildrel \Delta \over \longrightarrow K_2[Zn(CN)_4]+2Au}$$
  3. C $\mathrm{Zr+2I_2 \buildrel \Delta \over \longrightarrow ZrI_4}$
  4. D $\mathrm{Ni+4CO\buildrel \Delta \over \longrightarrow Ni(CO)_4}$ Correct answer

Solution

Mond process is need for the purification of $\mathrm{Ni}$ metal <br/><br/> $$ \begin{aligned} & \therefore \underset{\text { (impure) }}{\mathrm{Ni}}+4 \mathrm{CO} \stackrel{330-350 \mathrm{k}}{\longrightarrow} \mathrm{Ni}(\mathrm{CO})_{4} \\\\ & \mathrm{Ni}(\mathrm{CO})_{4} \stackrel{450-470 \mathrm{k}}{\longrightarrow} \underset{\text { (pure) }}{\mathrm{Ni}}+4 \mathrm{CO} \end{aligned} $$

About this question

Subject: Chemistry · Chapter: p-Block Elements · Topic: Group 13: Boron Family

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