NCERT Class XII Chemistry
Chapter - The p-Block Elements
Questions with Solutions
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Question : 7
Total: 74
Illustrate how copper metal can give different products on reaction with H N O 3
Solution:
Nitric acid is a strong oxidising agent and attacks most metals.
The products of oxidation depend upon the concentration of the acid,temperature and the nature of the material undergoing oxidation. Copperwith cold dil. HNO3 forms nitric oxide (NO).
3 C u +
→ 3 C u ( N O 3 ) 2 + 2 N O + 4 H 2 O
Copper with hot conc.H N O 3 ( N O 2 )
C u +
→ C u ( N O 3 ) 2 + 2 N O 2 + 2 H 2 O
The products of oxidation depend upon the concentration of the acid,temperature and the nature of the material undergoing oxidation. Copperwith cold dil. HNO3 forms nitric oxide (NO).
Copper with hot conc.
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