Which type of reaction takes place when an iron nail is dipped in a solution of copper sulphate?

Combination

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Displacement

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Double displacement

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Decomposition

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Solution

The correct option is B
Displacement

When an iron nail is dipped in copper sulphate solution, a brown coating of copper is formed on the surface of iron and colour of copper sulphate solution changes from light blue to light green. This reaction shows that iron is more reactive than copper as it displaces copper from its solution and iron passes into solution. This reaction is known as displacement reaction.

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Similar questions

Q. The reaction between iron and copper sulphate solution represents which type of reaction ?
(1) decomposition
(2) combination
(3) single displacement
(4) double decomposition

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.

The image shows iron nail dipped in a copper sulfate solution. Reaction takes place and sometime later, iron sulfate is observed in the solution. If we replace the iron nail with the gold nail similar changes will be observed.

State whether the statement is true or false.

"The image shows iron nail dipped in copper sulphate solution. Reaction takes place and some time later, iron sulphate is observed in the solution. In this reaction gold nail can also be used instead of iron."

When $H_{2} S$ gas is passed through the blue solution of $C u S O_{4}$ , a black precipitate of copper sulphide is obtained and the sulphuric acid formed remains in the solution. The reaction is an example of:

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