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4. d and f- block elements — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistry4. d and f- block elements1 Mark
MCQ
Which metal is ultrap urifiedusing carbon monoxide?
  • A
    $Cu$
  • B
    $Zr$
  • C
    $Al$
  • ✓
    $Ni$
✓

Answer

Correct option: D.
$Ni$
d
Mond Process for Refining Nickel: In this process, nickel is heated in a stream of carbon monoxide forming a volatile complex named as nickel tetracarbonyl. This complex is decomposed at a higher temperature to obtain the pure metal.

The reactions are:

$Ni +4 CO \rightarrow Ni ( CO )_4$

$Ni ( CO )_4 \rightarrow Ni +4 CO$

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