Flash Education

Question

A student took a solution of copper sulphate in a beaker and put a clean iron nail into it and left it for about an hour.

Physical and chemical changes CBSE Class 7

May 21, 2024

Answer

(a) (i) Colour of the solution in the beaker changes from blue to green.

(ii) A brown coloured deposit is found on the surface of the iron nail.

(b) The changes are chemical in nature as new substances, iron sulphate (green) and copper (brown) are formed.

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