TS EAMCET · Chemistry · d and f Block Elements
What is the final chemical form of Gold (Au) when it is dissolved in aqua-regia?
- A \(\mathrm{Au}\)
- B \(\mathrm{AuCl}\)
- C \(\mathrm{AuCl}_2\)
- D \(\left[\mathrm{AuCl}_4\right]^{-}\)
Answer & Solution
Correct Answer
(D) \(\left[\mathrm{AuCl}_4\right]^{-}\)
Step-by-step Solution
Detailed explanation
When gold (Au) dissolved in aqua-regia, it forms chloroauric \(\left(\mathrm{HAuCl}_4\right)\) ion. It will react very slowly with chlorin gas at room temperature to form gold chloride. We know that aqua-regia is…
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