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ICSE Class 10 Chemistry 2014 Paper

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Write balanced equations for the following :
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Question : 22 of 88
Marks: +1, -0
Action of heat on a mixture of copper and concentrated nitric acid.
Solution:  
  Cu+4HNO3→Cu(NO3)2+2NO2+\; \mathrm{Cu} + 4 \mathrm{HNO}_3 \rightarrow \mathrm{Cu} ( \mathrm{NO}_3 )_2 + 2 \mathrm{NO}_2 +   2H2O\; 2 \mathrm{H}_2 \mathrm{O}
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