Question

Why does blue colour of copper sulphate solution start feeding when zinc rod is dipped in it?

Answer 1

this is because zinc sulphate is formed

zinc replaces copper {zinc is more reactive than copper in the reactivity series}

Answer 2

Zinc is more reactive than copper. hence, it easily displaces copper from it's sulphate solution. so..The blue color starts fading and copper gets deposited on the rod.

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