Q35 / 160 · WBJEE 2010 · Chemistry

When $\mathrm{AgCl}$ is treated with $\mathrm{KCN}$

A
$\mathrm{Ag}$ is precipitated
Correct answer
B
a complex ion is formed
C
double decomposition takes place
D
no reaction takes place

Solution

Hints: $\mathrm{AgCl}+2 \mathrm{KCN} \rightarrow \mathrm{K}\left[\mathrm{Ag}(\mathrm{CN})_2\right]+\mathrm{KCl}$

Hence, the correct answer is option: 'B'.

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