Assertion: Colour of copper sulphate solution changes when

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Q.
Assertion: Colour of copper sulphate solution changes when an iron nail is kept immersed in it.
Reason: The colour of copper sulphate solution changes due to the decomposition reaction taking place between iron and copper, leading to formation of iron sulphate.

1 Both assertion and reason are correct and reason is the correct explanation of assertion.

2 Both assertion and reason are correct, but reason is not the correct explanation of assertion.

3 Assertion is true, but reason is false.

4 Assertion is false, but reason is true.

Ans.
(3)

The colour changes due to a displacement reaction, not decomposition. Iron displaces copper from copper sulphate solution, forming iron sulphate.

Solution

Q.
Assertion: Colour of copper sulphate solution changes when an iron nail is kept immersed in it.
Reason: The colour of copper sulphate solution changes due to the decomposition reaction taking place between iron and copper, leading to formation of iron sulphate.

1 Both assertion and reason are correct and reason is the correct explanation of assertion.

2 Both assertion and reason are correct, but reason is not the correct explanation of assertion.

3 Assertion is true, but reason is false.

4 Assertion is false, but reason is true.

Ans.
(3)

The colour changes due to a displacement reaction, not decomposition. Iron displaces copper from copper sulphate solution, forming iron sulphate.

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Solution

Q. Assertion: Colour of copper sulphate solution changes when an iron nail is kept immersed in it. Reason: The colour of copper sulphate solution changes due to the decomposition reaction taking place between iron and copper, leading to formation of iron sulphate.

1 Both assertion and reason are correct and reason is the correct explanation of assertion.

2 Both assertion and reason are correct, but reason is not the correct explanation of assertion.

3 Assertion is true, but reason is false.

4 Assertion is false, but reason is true.

Ans. (3) The colour changes due to a displacement reaction, not decomposition. Iron displaces copper from copper sulphate solution, forming iron sulphate.

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Q.
Assertion: Colour of copper sulphate solution changes when an iron nail is kept immersed in it.
Reason: The colour of copper sulphate solution changes due to the decomposition reaction taking place between iron and copper, leading to formation of iron sulphate.

Ans.
(3)

The colour changes due to a displacement reaction, not decomposition. Iron displaces copper from copper sulphate solution, forming iron sulphate.