Chemistry - Electrochemistry Question with Solution | TestHub

ChemistryElectrochemistryGalvanic cells/Nernst Equation/Concentration CellsMedium2 minQB

ChemistryMediummultiple choice

Which of the following action will increase the cell voltage at constant temperature ?

Options:(select one or more)

Answer:

B, C

Solution:

(A) Cell reaction

$AgNO_{3} (aq, m_{R}) ⇌ AgNO_{3} (aq, m_{L})$

Increase in $m_{L}$ will decrease cell voltage.

(B) Cell reaction

$H_{2} (g, P_{1}) ⇌ H_{2} (g, P_{2})$

Increase in $P_{1}$ will increase cell voltage.

(C) Cell reaction : $2 Fe (CN)_{6}^{4 -} (aq) + MnO_{2} (s) + 4 H^{+} (aq) ⇌ 2 Fe (CN)_{6}^{3 -} (aq) + Mn^{2 +} (aq) + 2 H_{2} O (l)$ Decrease in pH (increase in $[H^{+}]$ ) will increase the cell voltage.

(D) Cell reaction

$2 Fe^{2 +} (aq) + Sn^{4 +} (aq) ⇌ 2 Fe^{3 +} (aq) + Sn^{2 +} (aq)$

Addition of $Fe^{3 +}$ will decrease the cell voltage.

Stream:JEESubject:ChemistryTopic:ElectrochemistrySubtopic:Galvanic cells/Nernst Equation/Concentration Cells

⏱ 2mℹ️ Source: QB

Doubts & Discussion

Loading discussions...