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The standard oxidation potentials of Ze ...

The standard oxidation potentials of Ze and Ag in water at `25^@C` are
`Zn(s) rarr Zn^(2+) + 2e" "[E^@= 0. 76 V]`
`Ag(s) rarr Ag^+ +e" " [E^@=- 0. 80 V]`
Which of the following reactions actually takes place ?

A

`Zn_((s))+2Ag_((aq))^(+)toZn_((aq))^(++)+2Ag_((s))`

B

`Zn_((aq))^(++)+2Ag_((s))to2At_((aq))^(+)+Zn_((s))`

C

`Zn_((s))+Ag_((s))toZn_((aq))^(++)+Ag_((aq))^(+)`

D

`Zn_((aq))^(++)+Ag_((aq))^(+)toZn_((s))+Ag_((s))`

Text Solution

Verified by Experts

The correct Answer is:
A

In this reaction zinc act as an anode and Ag act as a cathode.
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