Question

Colour of cuso4 solution in water is physical change

Answer 1

Since water vapor is released and the solid changes color, this should be considered as a chemical reaction, not a physical change. By heatingcopper(II) sulfate pentahydrate until it was white and contained no more water, you undergo a chemical change. The chemical makeup of CuSO4. 5H2O changed to CuSO4
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Answer 2

tea leaf and water
milk and water
sugar and water
milk and salt