Question:
With reference to aqua regia, choose the correct option(s)
With reference to aqua regia, choose the correct option(s)
Updated On: Jun 14, 2022
- Aqua regia is prepared by mixing cone. HCI and cone. $HNG_3$ in 3:1 (v/v) ratio
- Reaction of gold with aqua regia produces an anion having Au in +3 oxidation state
- Reaction of gold with aqua regia produces $NO_2$ in the absence of air
- The yellow colour of aqua regia is due to the presence of NOCI and $Cl_2$
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The Correct Option is D
Solution and Explanation
$\left(1\right) Au + HNO_{3} + 4HCl \rightarrow AuCl_{4}^{\Theta} + H_{3}O^{+} + NO + H_{2}O$
$(2)$ Aqua regia $= 3HCl$(conc.) $+ HNO_3$(conc.)
$(3) AuCl_4^{\Theta}$ is produced
$(4)$ Yellow colour of aqua regia is due to it's decomposition into $NOCl$(orange yellow) and $Cl_2$(greenish yellow).
$(2)$ Aqua regia $= 3HCl$(conc.) $+ HNO_3$(conc.)
$(3) AuCl_4^{\Theta}$ is produced
$(4)$ Yellow colour of aqua regia is due to it's decomposition into $NOCl$(orange yellow) and $Cl_2$(greenish yellow).
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