In which of the following redox reactions are neither the reactants no

1.	In which of the following redox reactions are neither the reactants nor the products favored ?
Answer» ` Co(s) +Ni^(2+) (AQ.)RARR Co^(2+) (aq.) + Ni(s)` ` CU(s) +2Ag^(2+) (aq.) rarr Cu^(2+) (aq.) +2 Ag(s)` `Zn(s) +Cu^(2+) (aq.) rarr Zn^(2+) (aq.) + Cu(s)` ` Fe(s) +3Cu^(2+) (aq.) rarr 2Fe^(3+) (aq.) + Cu(s)` SOLUTION :At equlubrium, chemical tests reveal that both `Ni^(2+)` (aq.) and `Co^(2+) (aq)` are pesent at moderate concentrations.

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