MCQ
Which of the following has smallest size
- A$M{g^{2 + }}$
- B$N{a^ + }$
- C$A{l^{3 + }}$
- ✓$S{i^{4 + }}$
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$\text { A } \quad\quad\quad\quad\quad \text { B } \quad\quad\quad\text { C } \quad\quad\quad\quad\text { D }$
$1 \times 10^{-4} \quad 2 \times 10^{-4} \quad 0.1 \times 10^{-4} \quad 0.2 \times 10^{-4}$
(Where $E$ is the electromotive force)
Which of the above half cells would be preferred to be used as reference electrode?