The metal extracted by leaching with a cyanide is

  • Option 1)

    Mg

  • Option 2)

    Ag

  • Option 3)

    Cu

  • Option 4)

    Na

 

Answers (1)

As we learnt in

Leaching -

In this process we use suitable agent  which react with ore to form water soluble complex while impurities are insoluble 

- wherein

Ag2S +NaCN \overset{O2}{\rightarrow} Na [Ag (CN)2

Na [Ag (CN)2] + Zn{\rightarrow} Na2 [Zn(CN)4] +Ag {\downarrow}

 

 Ag forms a water soluble complex with cyanide while the impurities are insoluble 

Ag2S+4NaCN-2Na (Ag (CN)2)+Na2S


Option 1)

Mg


This option is incorrect 

Option 2)

Ag

This option is correct 

Option 3)

Cu

This option is incorrect 

Option 4)

Na

This option is incorrect 

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