Question

The EMF of the cell $Tl / Tl ^{+}(0 \cdot 001 \,M ) \| Cu ^{2+}(0 \cdot 01 \,M ) / Cu$ is $0.83$. The cell EMF can be increased by

• A. Increasing the concentration of $Tl^{+}$ ions.
• B. Increasing the concentration of $Cu^{2+}$ ions.
• C. Increasing the concentration of $Tl^{+}$ and $Cu^{2+}$ ions.
• D. None of these

Answer 1

Answer: (B)

The oxidation potential $\propto \frac{1}{\text { Concentration of ions } \mu}$ and reduction potential $\propto$ concentration of ions. The cell voltage can be increased by decreasing the concentration of ions around anode or by increasing the concentration of ions around cathode