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Extraction of gold and silver involves leaching with CN- ion. Silver is later recovered by:

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Important Questions on General Principles and Processes of Isolation of Elements

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - General Principles and Processes of Isolation of Elements>Competitive Thinking>Q 12
Leaching of gold with dilute aqueous solution of NaCN in presence of oxygen gives complex A, which on reaction with zinc forms the elemental gold and another complex B. A and B, respectively are
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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - General Principles and Processes of Isolation of Elements>Competitive Thinking>Q 13

When limestone is heated, CO2 is given off. The metallurgical operation is ____.

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - General Principles and Processes of Isolation of Elements>Competitive Thinking>Q 14

The substance which is mixed with the ore for removal of impurities is termed as _____.

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - General Principles and Processes of Isolation of Elements>Competitive Thinking>Q 15

Flux is used to remove_____.

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - General Principles and Processes of Isolation of Elements>Competitive Thinking>Q 16

Which of the following flux is used to remove acidic impurities in metallurgical process?

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - General Principles and Processes of Isolation of Elements>Competitive Thinking>Q 17

During the extraction of a metal from its ore, which of the following flux is needed for the gangue silica?

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - General Principles and Processes of Isolation of Elements>Competitive Thinking>Q 18

Hydro-metallurgical process of extraction of metals is based on _____.

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MHT-CET TRIUMPH Chemistry Multiple Choice Questions Part - 2 Based on Std. XI & XII Syllabus of MHT-CET>Chapter 1 - General Principles and Processes of Isolation of Elements>Competitive Thinking>Q 19

Name the metal that is purified by placing the impure metal on sloping hearth of a reverberatory furnace and heating that above its melting point in absence of air.