AIIMS 201925 May
- Exam
- AIIMS
- Year
- 2019
- Date
- 25 May
- Subject
- Chemistry
- Chapter
- Electrochemistry
AIIMS 2019 · 25 May · Chemistry · Electrochemistry
Calculate emf of the following cell at 25^ C if value of E_ cell ^...
Calculate emf of the following cell at if value of is (Given ) :
Options
- A
- B
- C
- D
Correct answer
A.
Step-by-step solution
\begin{aligned} & \text{ } E_{\text{cell }}=E_{\text{cell }^{\circ}-\frac{R T}{2 F} \ln \frac{0.01}{0.0001} \\ & =4-\frac{R T}{2 F} \ln \frac{10^{-2}}{10^{-4}}=4-\frac{R T}{2 F} \ln 10^2 \\ & =4-\frac{R T}{F} \ln 10=4-0.06=3.94 \mathrm{ V}\end{aligned}