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Assertion (A): For a Daniell cell : Zn...

Assertion `(A):` For a Daniell cell `:`
`Zn|Zn^(2+)||Cu^(2+)|Cu` with `E_(cell)=1.1V`, the application of opposite potential greater than `1.1V` results into the flow of electron from cathod to anode. Reason `(R):` Zn is deposited at anode and Cu is dissolved at cathode

A

If both assertion and reason are true and the reason is the correct explanation of the assertion.

B

If both assertion and reason are true but reason is not the correct explanation of the assertion.

C

If assertion is true but reason is false.

D

If the assertion and reason both are false.

Text Solution

Verified by Experts

The correct Answer is:
A
During discharging:
`Zn(s) rarr Zn^(2+)(aq) + 2e^(-)` (anode)
`Cu^(2+)(aq)+ 2e^(-) rarr Cu(s)` (cathode)
Flow of electrons from anode to cathode. The value of `E_("cell")`= 1.1V
If the opposite potential is now greater than 1.1V then the electrons will flow from cathode to anode.
During charging:
`Zn^(2+)(aq)+ 2e^(-) rarr Zn(s)` (anode)
`Cu(s) rarr Cu^(2+)(aq)+ 2e^(-)` (cathode)
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