MCQ
Initial $EMF$ of above cell at $298$ $K$ is .............. $\mathrm{V}$


- A$-0.059$
- ✓$0.059$
- C$0.59$
- D$0.0059$

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Assertion $(A):$ The ionic radii of $O ^{2-}$ and $Mg ^{2+}$ are same.
Reason $( R )$ : Both $O ^{2-}$ and $Mg ^{2+}$ are isoelectronic species.
In the light of the above statements, choose the correct answer from the options given below
$A, \,C$ and $D$ are
