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Cyanide or Macarthur Forrest Process

Cyanide proce...

Question

Cyanide process is used for the extraction of:

A

Au

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B

Ag

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C

Al

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D

Both Au and Ag

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Solution

The correct option is D Both Au and Ag
The cyanide process is used for the extraction of Au and Ag from their ores by dissolving them in a dilute solution of $K C N$ or $N a C N$ . This process is also called MacArthur-Forrest process.

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Q. Cyanide process is used for the extraction of:

Q. Gven below is the incomplete equation for the extraction process of gold using potassium cyanide. Identify the missing reagent?

Roasted gold ore + C N^{─} + ? ? \to [A u (C N)_{2}]^{─} + O H^{─}

Q. During the extraction of Ag and Au using a KCN solution,cyanide ions react with metal ions as :

Q. Match list I with list II and select the correct answer using the codes given below the lists.

List I	List II
I. Cyanide process	A. Ultrapure $G e$
II. Floatation process	B. Pine oil
III. Electrolytic reduction	C. Extraction of $A l$
IV. Zone refining	D. Extraction of $A u$

List I	List II
i. Cyanide process	A. Ultrapure Ge
ii. Floating process	B. Pine oil
iii. Electrolytic reduction	C. Extraction of $A l$
iv. Zone refining	D. Extraction of $A u$

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

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