Question

In the process of extraction of gold,

Roasted gold ore

+ \mathrm{C}{\mathrm{N}^ - }\mathrm{\;} + \mathrm{\;}{\mathrm{H}_2}\mathrm{O\;}\mathop \to \limits^{{\mathrm{O}_2}} \mathrm{\;}\left[ X \right]\mathrm{\;} + \mathrm{\;O}{\mathrm{H}^ - }

\left[ X \right]\mathrm{\;} + \mathrm{\;Zn\;} \to \mathrm{\;}\left[ Y \right]\mathrm{\;} + \mathrm{\;Au}

Identify the complexes [X] and [Y]

Accepted Answer

$X = {\left[ {{\rm{Au}}{{\left( {{\rm{CN}}} \right)}_2}} \right]^ - },{\rm{\;}}Y = {\left[ {{\rm{Zn}}{{\left( {{\rm{CN}}} \right)}_4}} \right]^{2 - }}$

Answer

$X = {\left[ {{\rm{Au}}{{\left( {{\rm{CN}}} \right)}_4}} \right]^{3 - }},{\rm{\;}}Y = {\left[ {{\rm{Zn}}{{\left( {{\rm{CN}}} \right)}_4}} \right]^{2 - }}$

Answer

$X = {\left[ {{\rm{Au}}{{\left( {{\rm{CN}}} \right)}_2}} \right]^ - },{\rm{\;}}Y = {\left[ {{\rm{Zn}}{{\left( {{\rm{CN}}} \right)}_6}} \right]^{4 - }}$

Answer

$X = {\left[ {{\rm{Au}}{{\left( {{\rm{CN}}} \right)}_4}} \right]^ - },{\rm{\;}}Y = {\left[ {{\rm{Zn}}{{\left( {{\rm{CN}}} \right)}_4}} \right]^{2 - }}$

NEET UG CHEMISTRY MCQ: GENERAL PRINCIPLES AND PROCESSES OF ISOLATION OF ELEMENTS

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