Question

You take an aqueous solution of cuso4 (blue in colour) in the test tube. Now dip a clean iron nail in cuso4 solution. Observe the test tube after 25 minutes

Answer 1

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Reaction :-

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$\sf{CuSO_{4} \: + \: Fe \: {\rightarrow} \: FeSO_{4} \: + \: Cu}$

CuSO4 (Blue in colour)

FeSO4 (Green in colour)

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As the Iron(Fe) is more reactive than Copper(Cu) .So, it will displace copper from its solution and make its own solution.

After 25 mins the Blue Colour will be converted to Light Green Colour.

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Answer 2

$\bold\green{Reaction :-}$

$\tt{CuSO_{4} \: + \: Fe \: {\rightarrow} \: FeSO_{4} \: + \: Cu}$

CuSO4 (Blue in colour)

FeSO4 (Green in colour)

As the Iron(Fe) is more reactive than Copper(Cu) .So, it will displace copper from its solution and make its own solution.

After 25 mins the Blue Colour will be converted to Light Green Colour.

For example :-

When iron nail is dipped in Copper sulphate, it takes reaction between them and Copper sulphate changes its color from blue to light green