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5)a)From data tableEo((Cl2(g)/2Cl-)) = 1.36Eo((Cu2+/Cu(s))) = 0.337Eo((Al3+/Al(s))) = -1.662The one with greater Eo value of reduction will be reducedeasilySo, it will be better oxidising agentThus, Eo is direct measure of oxidising powerDecreasing order of Oxidising Power is:Best Oxidising agentCl2(g)Cu2+Al3+Worst Oxidising agentAnswer: Al3+ b)The one with greater Eo value of reduction will be reducedeasilySo, it will be better ... See the full answer