Which of the following changes will be observed, when a copper wire is dipped in an aqueous solution of silver nitrate for some time?

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The colour of the solution changes from colourless to blue and a silver solid deposits on copper wire.

The colour of the solution changes from blue to colourless and a silver solid deposits on copper wire.

The colour of the solution does not change and a silver solid deposits on copper wire.

The colour of the solution changes from blue to colourless and a brown solid deposits on copper wire.

answer is C.

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Detailed Solution

Displacement reaction is a chemical reaction wherein a more reactive element displaces the less reactive one from its salt solution.
Reactivity series refers to the arrangement of metals in the descending order of their reactivities.
Copper is above silver in the reactivity series indicating that it is more reactive than silver.
Thus, when a copper wire is dipped in silver nitrate solution, it will displace silver and form a blue-coloured copper sulphate solution.

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