Question

An iron nail is suspended in copper sulphate solution and kept for a while. It is observed that the solution.

(a) Remains blue and a coating is formed on the nail

(b) Turns green and a coating is found on the nail.

(c) Remains blue and no coating is formed on the nail.

(d) Turns green and no coating is found on the nail. ​

Answer 1

Answer:

answer is c) because copper is less reactive than copper

Answer 2

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Correct option [b]:-Turns green and a coating is found on nail.

★When an iron nail is suspended in Copper sulphate solution $\tt\ (CuSO_4)$ ,then a chemical reaction take place.

★Copper is displaced by iron, and the type of reaction takes place in Decomposition reaction.

★Decomposition reaction:- A less reactive metal is displaced by high reactive metal.

★Here, copper is displaced and color of solution Turns to be green and there is a coating of red brown color on iron nail.

★Reaction:- $\tt\ Fe \: + \: CuSO_4 \: \to\ \: FeSO_4 \: + \: Cu$