Question

Name the gas evolved .
Action of heat on copper nitrate.

Answer 1

No2 gas evolved on heating cupper nitratr

Answer 2

Copper nitrate is a bright blue crystalline solid containing three molecules of water. When it is heated first it loses the water molecule, on further heating it decomposes to give reddish brown gas, nitrogen dioxide and oxygen. Chemically

Cu(NO3)2.3H2O --heat--> Cu(NO3)2 + 3H2O

2Cu(NO3)2 --heat--> 2CuO + 4NO2 + O2

Cupric Nitrate. Produced either by dissolving copper carbonate in nitric acid or direct from copper and nitric acid. It has a number of small uses, such as in ceramics, in dyeing as a mordant, in fireworks and in photography.

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