Which of the following changes will be observed, when a copper wire is dipped in an aqueous solution of silver nitrate for some time?
1
The colour of the solution changes from blue to colourless and a silver solid deposits on copper wire.
2
The colour of the solution changes from blue to colourless and a brown solid deposits on copper wire.
3
The colour of the solution changes from colourless to blue and a silver solid deposits on copper wire.
4
The colour of the solution does not change and a silver solid deposits on copper wire.