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Cyanide or Macarthur Forrest Process

Sodium cyanid...

Question

Sodium cyanide is used in the:

A

cleaning of silver

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B

creation of fires

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C

purification of acids

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D

extraction of gold

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Solution

The correct option is D extraction of gold
Solution:- (D) extraction of gold
In the metallurgy of gold, gold metal is leached with a dilute solution of $N a C N$ in the presence of air (for $O_{2}$ ). The gold metal is then obtained from the product by displacement reaction.

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Q. Which of the following acid is used by goldsmiths for cleaning gold and silver ornaments?

Q. Give both chemical equations of leaching of silver in silver metallurgy by using sodium cyanide?

Q. In the cyanide process for extraction of gold and silver from ores, the cyanide solution acts as a :

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. Gold is also extracted by cyanide process as in case of silver.

Write the reactions.

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