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Two drops of dilute sulphuric acid were added to 1 gm of copper sulphate powder and then small amount of hot water was added to dissolve it (step I). On cooling, beautiful blue coloured solution got separated (step II). Step I and step II are:

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Answer:

Both are physical changes

Explanation:

The dissolution of 1 gram of copper sulphate powder in a small amount of hot water in the presence of dilute H2SO4 is a physical change because no new substance was really formed in the process. This implies that step 1 is a physical change.

In step II, the hot liquid is allowed to cool leaving behind a beautiful blue coloured solution. This also is a physical change.

Hence both step I and step II are physical changes.

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