During the electrolysis of aqueous zinc nitrate.

Options

A. Zince plates out at the cathode
B. Zince plates out at the anode
C. Hydrogen gen `H_(2)` is evolved at the anode.
D. Oxygen gas `O_(2)` is evolved at anode

Answer

a,d

Explanation

Anqueous `Zn(NO_(3))_(2):`
Cathode `: (sqrt()) Zn^(2+)(aq)+2e^(-) rarr Zn(s)`
`E^(c-)._(Zn^(2+)|Zn)=-0.76V`
`(X)2H_(2)O(l)+2e^(-) rarr H_(2)(g)+2overset(c-)(O)H(aq)`
`E^(c-)._(H_(2)O|H_(2))=-0.83V`
Anode `: (sqrt())2H_(2)O(l) rarr O_(2)(g)+4H^(o+)(aq)+4e^(-)`
`E^(c-)._(H_(2)O|O_(2))`
`(X)NO_(3)^(c-)rarr x`