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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 1).On cooling, beautiful blue coloured crystals got separated (step II). Step I and Step II are
- physical and chemical changes respectively
- chemical and physical changes respectively
- both physical change
- both chemical change.
Correct answer: (c) both physical change
Explanation: Dissolution of copper sulphate powder in water in presence of sulphuric acid is a physical change. On cooling this hot solution, the crystals of copper sulphate are separated, This is also a physical change.
Updated on: 01-Feb-2023
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