Given that aligned & E _ Ni ²⁺ / Ni ^ =-0.25 ~V , E _ Cu ²⁺ / Cu ^ =+0.34 ~V & E _ Ag ⁺ / Ag ^ =+0.80 ~V , E _ Zn ²⁺ / Zn ^ =-0.76 ~V aligned Which of the following redox process will not take place in specified direction?

Step-by-step solution

E _ redox chan ^ change will be negative for non-spontaneous reaction aligned & Ni ²⁺( aq )+ Cu ( s ) Ni ( s )+ Cu ²⁺( aq ) & E ^ = E _ Ni ²⁺ / Ni ^ - E _ Cu ²⁺ / Cu ^ =-0.25-0.34=-0.59 ~V (- ve , non - spontaneous ) & Cu ( s )+2 H ⁺( aq ) Cu ²⁺( aq )+ H ₂( ~g ) & E ^ = E _ H ⁺ / H ₂ ^ - E _ Cu ²⁺ / Cu ^ =0-0.34=-0.34 ~V (- ve , non - spontaneous ) aligned