MCQ
In the following given reaction ' $A$ ' is


- A

- B

- C

- ✓








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| $List-I$ | $List-II$ |
| $(A)$ $Cd ( s )+2 Ni ( OH )_{3}( s ) \rightarrow CdO ( s )+2 Ni ( OH )_{2}( s )+ H _{2} O (l)$ | $(I)$ Primary battery |
| $(B)$ $Zn ( Hg )+ HgO ( s ) \rightarrow ZnO ( s )+ Hg (l)$ | $(II)$ Discharging of secondary battery |
| $(C)$ $2 PbSO _{4}( s )+2 H _{2} O (l) \rightarrow Pb ( s )+ PbO _{2}( s )+ 2 H _{2} SO _{4}( aq )$ | $(III)$ Fuel cell |
| $(D)$ $2 H _{2}( g )+ O _{2}( g ) \quad \rightarrow 2 H _{2} O (l)$ | $(IV)$ Charging of secondary battery |
Choose the correct answer from the options given below.
$(i)\, Cu^{2+} + 2e^- \rightarrow Cu\,,$ $ E^o = 0.337\, V$
$(ii)\, Cu^{2+} + e^- \rightarrow Cu^+\,,$ $ E^o = 0.153\, V$
Electrode potential, $E^o$ for the reaction,
$Cu^+ + e^- \rightarrow Cu\,,$ will be ............ $V$.