The diagram shows an electrolysis experiment using metals X and Y as electrodes.
One of the metals becomes coated with copper.
Which metal becomes coated and which aqueous solution is used?

1 )
metal: X / aqueous solution: $CrC{l_3}$
2 )
metal: X / aqueous solution: $CuC{l_2}$
3 )
metal: Y / aqueous solution: $CrC{l_3}$
metal: Y / aqueous solution: $CuC{l_2}$
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