Aqua regia is used for dissolving noble metal | vedclass

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(C) Aqua regia is a mixture of concentrated $HCl$ and concentrated $HNO_{3}$ in a $3:1$ molar ratio. It dissolves noble metals like gold $(Au)$ and pl

Vedclass · Accepted Answer

$NO$

Vedclass · Answer

(C) Aqua regia is a mixture of concentrated $HCl$ and concentrated $HNO_{3}$ in a $3:1$ molar ratio. It dissolves noble metals like gold $(Au)$ and platinum $(Pt)$ by oxidizing them. The chemical reaction for the dissolution of gold is: $Au + 3HNO_{3} + 4HCl \rightarrow HAuCl_{4} + 3NO + 2H_{2}O$. As seen in the reaction,the gas evolved is nitric oxide $(NO)$.

Aqua regia is used for dissolving noble metals ($Au$,$Pt$,etc.). The gas evolved in this process is:

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