ICSE Class 10 Chemistry Question 33 of 63

Study of Compounds — Nitric Acid — Question 33

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33
Question

Question 2(2011)

State your observation when —

Copper is heated with concentrated nitric acid in a hard glass test tube.

Answer

Dense brown fumes of nitrogen dioxide can be seen.

Cu+4HNO3ΔCu(NO3)2+2H2O+2NO2\text{Cu} + 4\text{HNO}_3 \xrightarrow{\Delta} \text{Cu(NO}_3)_2 + 2\text{H}_2\text{O} + 2\text{NO}_2