Question

# Explain Mond's process used for refining of nickel.

Solution

## Mond process for refining of Nickel is based on the principle that nickel is heated in the presence of carbon monoxide to form nickel tetracarbonyl, which is a volatile copound.$$Ni + 4 CO \xrightarrow{330-350 \; K} \underset{\left( \text{Nickel tetracarbonyl} \right)}{Ni{\left( CO \right)}_{4}}$$Now, the obtained nickel tetracarbonyl is decomposed by subjecting it to a higher temperature $$\left( 450 - 470 \; K \right)$$ to obtain pure nickel metal.$$\underset{\left( \text{Nickel tetracarbonyl} \right)}{Ni{\left( CO \right)}_{4}} \xrightarrow{450 - 470 \; K} \underset{\left( \text{Pure nickel} \right)}{Ni} + 4 CO$$Chemistry

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