Question

why do coloured crystal of copper turns into white powder on heating​

Answer 1

The colour of hydrated copper sulphate CuSO4. 5H2O is blue that turns into white, when heated at high temperature in a test tube, due to the loss of water molecules from copper sulphate.☺❤❤

Answer 2

Answer:

The blue coloured copper sulphate crystals turns white due to the loss of water molecules. The formula of copper sulphate is CuSO4. 5H2O. When copper sulphate is heated, it looses water molecules and hence it looses blue colour.