Cyanide process is used for the extraction of

  • Option 1)

    barium

  • Option 2)

    aluminium

  • Option 3)

    boron

  • Option 4)

    silver.

 

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 .

Ag_2S + 4NaCN\rightarrow 2Na\left [ Ag(CN)_2 \right ] +Na_2S


Option 1)

barium

Incorrect

Option 2)

aluminium

Incorrect

Option 3)

boron

Incorrect

Option 4)

silver.

Correct

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