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

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{\text{A}}{{\text{g}}_2}{\text{S}} + \mathop {{\text{KCN}}}\limits_{{\text{Excess}}} \to {\left[ {{\text{Ag}}{{({\text{CN}})}_{\text{x}}}} \right]^{ - {\text{n}}}}

\left[\mathrm{Ag}(\mathrm{CN})_{\mathrm{x}}\right]^{-\mathrm{n}}+\mathrm{Zn} \rightarrow\left[\mathrm{Zn}(\mathrm{CN})_{\mathrm{y}}\right]^{-\mathrm{m}}

Find the sum of

\mathrm{x}

and

\mathrm{y}

.

View answer and explanation

Correct option: A

6

Option A is correct because the reaction forms [Ag(CN)2]^- and [Zn(CN)4]^2-, so x=2 and y=4, and their sum is 6.

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