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JEE CHEMISTRY MCQ: GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

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In the extraction of silver from argentite ore. The ore is treated with dil. solution of

\mathrm{NaCN}

in water in the presence of

\mathrm{Y}

, whereby the following reaction takes place:

\mathrm{Ag}_2 \mathrm{X}+4 \mathrm{NaCN}+2 \mathrm{Y} \rightarrow 2 \mathrm{Na}\left[\mathrm{Ag}(\mathrm{CN})_2\right]+\mathrm{Na}_2 \mathrm{XO}_4 \cdot \mathrm{X}

and

\mathrm{Y}

in this reaction are respectively :

View answer and explanation

Correct option: B

\mathrm{S}

and

\mathrm{O}_2

Option B (

\mathrm{S}

and

\mathrm{O}_2

) is correct because the reaction involves silver sulfide reacting with sodium cyanide and oxygen to form a silver cyanide complex and sodium sulfate.

JEE CHEMISTRY MCQ: GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

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