Question

Iron nails when left dipped in blue copper sulphate solution become brownish in colour and blue colour of copper sulphate solution turns to light green give reason

Answer 1

Explanation:

When an iron nail is dipped in copper sulphate solution, then the colour of copper sulphate solution changes because iron displaces copper from copper sulphate solution to form light green solution of iron sulphate. This reaction is known as displacement reaction.

This displacement occurs because iron is more reactive than copper.

The reaction involved here is:

Fe+CuSO4=FeSO4+Cu

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Answer 2

*When an iron nail is dipped in copper sulphate solution, then the colour of copper sulphate solution changes because iron displaces copper from copper sulphate solution to form light green solution of iron sulphate. This reaction is known as displacement reaction.

This displacement occurs because iron is more reactive than copper.*