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  • Which of the following metals is obtained by leaching its ore with dilute cyanide solution?Option: 1 Silver

Which of the following metals is obtained by leaching its ore with dilute cyanide solution?

Option: 1

Silver


Option: 2

Titanium


Option: 3

Vanadium


Option: 4

Zinc


Answers (1)

best_answer

Silver is obtained by leaching its ore (Argentite, Ag2S or horn silver, AgCl) with dilute cyanide solution by which it is extracted in the form of a soluble complex.

\mathrm{Ag}_{2} \mathrm{S}+4 \mathrm{NaCN} \rightleftharpoons 2 \mathrm{Na}\left[\mathrm{Ag}(\mathrm{CN})_{2}\right]+\mathrm{Na}_{2} \mathrm{S}

Silver is recovered from solution of sodium dicyanoargentate by treating it with zinc scrap.

2 \mathrm{Na}\left[\mathrm{Ag}(\mathrm{CN})_{2}\right]+\mathrm{Zn} \longrightarrow \mathrm{Na}_{2}\left[\mathrm{Zn}(\mathrm{CN})_{2}\right]+2 \mathrm{Ag}

Therefore, the option number (1) is correct.

Posted by

vinayak

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