Two drops of dilute sulphuric acid were added to 1 g of copper sulphate powder and then small amount of hot water was added to dissolve it (Step I). On cooling, beautiful blue coloured crystals got separated (Step II). Step I and Step II are
A. physical and chemical changes respectively
B. chemical and physical changes respectively
C. both physical change
D. both chemical change
Answer:C
Two drops of dilute sulphuric acid were added to 1 g of copper sulphate powder and then small amount of hot water was added to dissolve it (Step I). On cooling, beautiful blue coloured crystals got separated (Step II). Step I and Step II are
A. physical and chemical changes respectively B. chemical and physical changes respectively C. both physical change D. both chemical change