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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 I). On cooling, beautiful blue coloured crystals got separated (step II). Step I and step II are:

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.

Answers (1)

Dissolution of copper sulphate powder in water in the presence of sulphuric acid is a physical change.

On cooling hot solution formed, the crystals of copper sulphate are separated, this is also a physical change.

Hence option (C) is correct. 

Posted by

Sumit Saini

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