Assertion: Gold is isolated from other impurities by the Arndt Forrest cyanide process. Reason: The cyanide which is used here dissolve all possible impurities.
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Yes , both are the correct answer for this question.
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Assertion and reason are correct and reason is the correct explanation of assertion.
Explanation:
Arndt Forrest cyanide process is used for the separation of gold from impurities. In this process, the ore is finely crushed and then dissolved in a solution of sodium cyanide. Potassium cyanide can also be used in place of sodium cyanide. The cyanide solution dissolves all impurities.
A clear solution is formed and solids are removed from the solution. Finally, zinc dust is used which act as froth stabilizer and the precious metal (Gold) is precipitated.
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