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  4. To dissolve argentite ore which of the following is used?

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Q. To dissolve argentite ore which of the following is used?

Punjab PMETPunjab PMET 2008General Principles and Processes of Isolation of Elements

Solution:

Argentite is $Ag _{2} S$.
$Ag _{2} S +4 NaCN \longrightarrow 2 Na \left[ Ag ( CN )_{2}\right]+ Na _{2} S$
$AgCl +2 NaCN \longrightarrow Na \left[ Ag ( CN )_{2}\right]+ NaCl$