Aqua regia is used for dissolving noble metals (Au, Pt, etc.). The gas evolved in this process is :
Show Hint
- N2O3
- N2
- N2O5
- NO
The Correct Option is D
Solution and Explanation
Au + 4H+ + NO3- + 4Cl- → AuCl4- + NO + 2H2O
3Pt + 16H+ + 4NO3- + 18Cl- → 3PtCl62- + 4NO + 8H2O
The gas evolved is nitric oxide, NO.
Answer: (4) NO
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