(D) The given chemical equation represents the MacArthur-Forrest process,which is used for the extraction of noble metals like gold $(Au)$ and silver

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(D) The given chemical equation represents the MacArthur-Forrest process,which is used for the extraction of noble metals like gold $(Au)$ and silver $(Ag)$ from their ores. The balanced equation for the dissolution of these metals in cyanide solution is: $4M + 8CN^{-} + 2H_2O + O_2 \rightarrow 4[M(CN)_2]^- + 4OH^{-}$ Here,$M$ represents either $Au$ or $Ag$. Therefore,both $(a)$ and $(b)$ are correct.

Class 12 Chemistry General Principles and Processes of Isolation of Elements Mix Examples of General Principles and processes of Isolation of Elements

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In the equation: $M + 8CN^{-} + 2H_2O + O_2 \rightarrow 4[M(CN)_2]^- + 4OH^{-}$,metal $M$ is

A
$Ag$
B
$Au$
C
$Cu$
D
Both $(a)$ and $(b)$

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Class 12 Questions

Class 12

Chemistry Questions

Chapter

General Principles and Processes of Isolation of Elements

Subtopic

Mix Examples of General Principles and processes of Isolation of Elements

Match List-$I$ (substances) with List-$II$ (processes) employed in the manufacture of the substances and select the correct option.

List-$I$ (Substances) List-$II$ (Processes)

$A$. Sulphuric acid $i$. Haber's process

$B$. Steel $ii$. Bessemer's process

$C$. Sodium hydroxide $iii$. Leblanc process

$D$. Ammonia $iv$. Contact process

DifficultAIPMT 2010

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Which alloy contains a non-metal?

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Metals are extracted by other methods through the formation of complexes. The complexes formed in these methods are: $I$: Cyanide process,$II$: Mond process,$III$: Photographic fixing process.

Difficult

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Write the uses of alloys.

Easy

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Which metals are used in the currency of the $UK$?

Easy

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List-$I$ (Substances)	List-$II$ (Processes)
$A$. Sulphuric acid	$i$. Haber's process
$B$. Steel	$ii$. Bessemer's process
$C$. Sodium hydroxide	$iii$. Leblanc process
$D$. Ammonia	$iv$. Contact process

In the equation: $M + 8CN^{-} + 2H_2O + O_2 \rightarrow 4[M(CN)_2]^- + 4OH^{-}$,metal $M$ is

Similar Questions

Which alloy contains a non-metal?

Metals are extracted by other methods through the formation of complexes. The complexes formed in these methods are: $I$: Cyanide process,$II$: Mond process,$III$: Photographic fixing process.

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