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Displacement Reactions

What changes ...

Question

What changes in the colour of iron nails and copper sulphate solution do you observe after keeping the iron nails dipped in copper sulphate solution for about 30 minutes?

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Solution

An iron nail displaces copper from a copper sulphate solution to form a ferrous sulphate solution, due to which the blue colour of the copper sulphate solution fades. Also, copper is deposited on the iron nail, which turns it reddish-brown in colour.

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What changed do you observe in iron nails and color of copper sulphate solution when iron nails are does in copper sulphate solution.

Q. Assertion :The colour of copper sulphate solution change when an iron nail is dipped in it. Reason: When an iron nail is placed in a copper sulphate solution, iron displaces copper from copper sulphate solution forming iron sulphate.

Q. (a) What happens when an aqueous solution of sodium sulphate reacts with an aqueous solution of barium chloride? State the physical conditions of reactants in which reaction between them will not take place. Write the balanced chemical equation for the reaction and also mention the type of reaction.

(b) What changes in the colour of iron nails and copper sulphate solution do you observe after keeping the iron nails in copper sulphate solution for about half an hour ?

Q. On keeping iron nails in blue colour copper sulphate solution it is observed that the colour of the solution turns green after sometimes give reason for this colour change in the type of reaction

Q. Question1

Why does the colour of copper sulphate solution change when an iron nail is dipped in it?

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Displacement Reactions

Standard VIII Chemistry

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