Question

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Answer 1

Answer:

a) copper do not react with dilute sulphuric acid as it comes behind the hydrogen in reactivity series. but with concentrated sulphuric acid it reacts to form cuso4 and SO2.

b) since iron is more reactive than copper it will displace copper from copper sulphate and form feso4. colour changes from blue to light green.

Explanation:

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Answer 2

When dilute sulphuric acid is poured on a copper plate, no reaction takes place due to less reactivity of copper. ... Copper gets deposited on the iron nail and green solution is ferrous sulphate solution.

Cu + H2SO4 → CuSO4 + H2

When an iron nail is dipped in copper sulphate solution, a brown coating of copper is formed on the surface of iron and the colour of copper sulphate solution changes from blue to light green.

CuSO4 + Fe --> FeSO4 + Cu