Aqua regia is used for dissolving noble metals

Question:

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

  1. $\mathrm{N}_{2}$

  2. $\mathrm{N}_{2} \mathrm{O}_{3}$

  3. NO

  4. $\mathrm{N}_{2} \mathrm{O}_{5}$


Correct Option: , 3

Solution:

$\mathrm{Au}+\mathrm{HNO}_{3}+4 \mathrm{HCl} \rightarrow \mathrm{HAuCl}_{4}+\mathrm{NO}+2 \mathrm{H}_{2} \mathrm{O}$

Leave a comment

Close

Click here to get exam-ready with eSaral

For making your preparation journey smoother of JEE, NEET and Class 8 to 10, grab our app now.

Download Now