Q21 / 180 · KCET 2014 · Chemistry

The IUPAC name of the complex ion formed when gold dissolves in aquaregia is

A
tetrachloridoaurate(I)
B
dichloridoaurate(III)
Correct answer
C
tetrachloridoaurate(III)
D
tetrachloridoaurate(II)

Solution

When gold dissolves in aqua region it gives tetrachloridoaurate (III) anion.
\( 2 \mathrm{Au}+3 \mathrm{H} \mathrm{N} \mathrm{O}_{3}+11 \mathrm{HCl} \rightarrow 2 \mathrm{H}\left[\mathrm{AuCl}_{4}\right]+3 \mathrm{NOCl}+6 \mathrm{H}_{2} \mathrm{O} \)

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

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