Statement I : 2CuCl→CuCl2+Cu is a disproportionation reaction.Statement II : All transition metals show disproportionation reactions.

I 'Cu' of Cu+ undergoes both oxidation(Cu+2) and reduction (Cu) Cu+ undergoes disproportionationII) Ox.state of tranition metals in elementary state is zero.Scandium cannot show other than +3 state. so it cannot undergo disproportionation reaction.Similarly many other transition elements do not undergo disproportionation reactions.Statement I is correctstatement II is false