Which of the following changes takes place at the positive electrode during the working of a dry cell?
- A$Zn_{(s)}$ is oxidised to $Zn^{2+}_{(aq)}$
- B$Zn^{2+}_{(aq)}$ is reduced to $Zn_{(s)}$
- C$MnO_{2_{(s)}}$ is reduced to $Mn_2O_{3_{(s)}}$
- D$Mn_2O_{3_{(s)}}$ is oxidised to $MnO_{2_{(s)}}$
Explore More
Similar Questions
When a lead storage battery is charged,it acts as:
Easy
View SolutionWhich of the following mixtures is used as an electrolyte paste in a mercury cell?
The equilibrium constant for the reaction $Zn_{(s)} + Sn^{2+}_{(aq)} \rightleftharpoons Zn^{2+}_{(aq)} + Sn_{(s)}$ is $1 \times 10^{20}$ at $298 \ K$. The magnitude of standard electrode potential of $Sn/Sn^{2+}$ if $E_{Zn^{2+}/Zn}^0 = -0.76 \ V$ is $............ \times 10^{-2} \ V$. (Nearest integer)
Given : $\frac{2.303 \ RT}{F} = 0.059 \ V$
Given : $\frac{2.303 \ RT}{F} = 0.059 \ V$
The acid used in lead storage cells is
Easy
View SolutionThe reference electrode is made by using
Easy
View SolutionVedclass Products
For Students
Vedclass Test Series
Mock tests in real JEE/NEET style with performance analysis. 5-day free trial.
Start Free TrialFor Teachers
Exam Paper Generator
Generate Set A/B/C/D exam papers from 7.5L+ questions in 2 minutes. 3 chapters free.
Try FreeFor Institutes
Online Exam Module
Live online exams with unlimited students, 360° analytics & white-label branding.
See Demo