In the extraction of nickel by the Mond proce | vedclass

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Question

(B) The Mond process is used for the purification of nickel. In this process,impure nickel is heated in a stream of carbon monoxide $(CO)$ at $330-350

Vedclass · Accepted Answer

thermal decomposition

Vedclass · Answer

(B) The Mond process is used for the purification of nickel. In this process,impure nickel is heated in a stream of carbon monoxide $(CO)$ at $330-350 \ K$ to form a volatile complex,nickel tetracarbonyl,$[Ni(CO)_4]$. $Ni(s) + 4CO(g) \xrightarrow{330-350 \ K} [Ni(CO)_4](g)$ This complex is then subjected to higher temperatures $(450-470 \ K)$,which causes thermal decomposition to yield pure nickel metal. $[Ni(CO)_4](g) \xrightarrow{450-470 \ K} Ni(s) + 4CO(g)$ Thus,the metal is obtained by thermal decomposition.

List-$I$	List-$II$
$(I)$ Van Arkel method	$a.$ Refining of Titanium
$(II)$ Solvay process	$b.$ Manufacture of $Na_2CO_3$
$(III)$ Cupellation	$c.$ Refining of Copper
$(IV)$ Poling	$d.$ Refining of Silver

In the extraction of nickel by the Mond process,the metal is obtained by:

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Match List-$I$ with List-$II$ and select the correct answer using the codes given below:

List-$I$ List-$II$

$(I)$ Van Arkel method $a.$ Refining of Titanium

$(II)$ Solvay process $b.$ Manufacture of $Na_2CO_3$

$(III)$ Cupellation $c.$ Refining of Copper

$(IV)$ Poling $d.$ Refining of Silver

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