Assertion (A): Metal ions must be present in a solution used for electroplating a particularmetal.Reason (R): Electroplating occurs only on anode.

The assertion (A) is correct. For electroplating to occur, the metal ions of the metal you want to plate with must be present in the solution. This is because during electroplating, the metal ions from the solution are reduced at the cathode to form a layer of metal.

The reason (R) is incorrect. Electroplating does not occur on the anode, it occurs on the cathode. The object to be plated is usually connected to the cathode, as reduction (gain of electrons) happens at the cathode. The anode is typically made of the metal that is to be plated onto the object. This is where oxidation (loss of electrons) occurs, releasing metal ions into the solution.