The extraction of nickel involves:

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(C) The extraction of nickel is carried out by the $Mond$ process. In this process,impure nickel is heated in a stream of carbon monoxide to form vola

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The formation and thermal decomposition of $Ni(CO)_4$

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(C) The extraction of nickel is carried out by the $Mond$ process. In this process,impure nickel is heated in a stream of carbon monoxide to form volatile nickel tetracarbonyl,$Ni(CO)_4$. $Ni(s) + 4CO(g) \xrightarrow{330-350 \ K} Ni(CO)_4(g)$ This volatile complex is then subjected to higher temperatures,causing it to decompose into pure nickel and carbon monoxide. $Ni(CO)_4(g) \xrightarrow{450-470 \ K} Ni(s) + 4CO(g)$ Therefore,the process involves both the formation and thermal decomposition of $Ni(CO)_4$.

List-$I$	List-$II$
$a$. Mercury	$i$. Vapour phase refining
$b$. Copper	$ii$. Distillation refining
$c$. Silicon	$iii$. Electrolytic refining
$d$. Nickel	$iv$. Zone refining

Similar Questions

Assertion : Lead,tin and bismuth are purified by liquation method.
Reason : Lead,tin and bismuth have low $m.p.$ as compared to impurities.

Explain the $Mond$ process for the refining of $Nickel$.

Which of the following methods is $NOT$ used for the purification of metals?

Match List-$I$ with List-$II$:

List-$I$ List-$II$

$a$. Mercury $i$. Vapour phase refining

$b$. Copper $ii$. Distillation refining

$c$. Silicon $iii$. Electrolytic refining

$d$. Nickel $iv$. Zone refining

Choose the most appropriate answer from the options given below:

In the $Hoop$ process for the refining of $Al$,the molten materials form three different layers and remain separated during electrolysis because ..........

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