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Assertion (A) : In a Daniell cell, if th...

Assertion `(A) :` In a Daniell cell, if the concentration of `Cu^(2+)` and `Zn^(2+)` ions are doubled, the `EMF` of the cell will be doubled.
Reason `(R) :` If the concentration of ions in contact with metals is doubled, the electrode potential is doubled.

A

If both (A) and (R) are correct, and (R) is the correct explanation of (A).

B

If both (A) and (R) are correct, but (R) is not the correct explanation of (A).

C

If (A) is correct, but (R) is incorrect

D

If (A) is incorrect, but (R) is correct.

Text Solution

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The correct Answer is:
D
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Statement-I: In the Daniel cell, if concentration of Cu^(2+) and Zn^(2+) ions are doubled the emf of the cell will not change. Because Statement-II: If the concentration of ions in contact with the metals is doubled, the electrode potential is doubled.

In the Daniel cell, if the concentrations of Zn^(2+) and Cu^(2+) ions are doubled at 298 K , the e.m.f. Of the cell __________.

Consider the cell Zn|Zn^(2+) || Cu^(2+)|Cu. If the concentration of Zn and Cu ions are doubled, the emf of the cell.

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