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JIPMER 2009

Exam: JIPMER
Year: 2009
Subject: Chemistry
Chapter: General Principles and Processes of Isolation of Metals

JIPMER 2009 · Chemistry · General Principles and Processes of Isolation of Metals

To dissolve argentite ore which of the following is used?

To dissolve argentite ore which of the following is used?

Options

A $\mathrm{Na}\left[\mathrm{Ag}(\mathrm{CN})_2\right]$
BNaCN
CNaCl
DHCl

Correct answer

B. NaCN

Step-by-step solution

\begin{aligned} & \text{ Argentite is } \mathrm{Ag}_2 \mathrm{ S} \text{. } \\ & \mathrm{Ag}_2 \mathrm{ S}+4 \mathrm{NaCN} \longrightarrow 2 \mathrm{Na}\left[\mathrm{Ag}(\mathrm{CN})_2\right]+\mathrm{Na}_2 \mathrm{ S} \\ & \mathrm{AgCl}+2 \mathrm{NaCN} \longrightarrow \mathrm{Na}\left[\mathrm{Ag}(\mathrm{CN})_2\right]+\mathrm{NaCl}\end{aligned}

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