Question

when an iron nail is kept dipped in freshly prepared copper sulphate solution taken in a test -tube
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Answer 1

Answer:

The colour of copper sulphate solution changes when iron nail is kept immersed in it due to the displacement reaction taking place between iron and copper leading to formation of iron sulphate

Explanation:

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Answer 2

The colour of copper sulphate solution changes when iron nail is kept immersed in it due to the displacement reaction taking place between iron and copper leading to formation of iron sulphate.