One gram of copper is deposited in a copper voltameter when a current of $0.5$ A flows for $30$ minutes. Then the current required to deposit $2$ g of silver in the same time is (ece of copper $= 3.3 \times 10^{-4}$ g C$^{-1}$, ece of silver $= 1.1 \times 10^{-3}$ g C$^{-1}$)
Show Hint
- 4 A
- 6 A
- 2 A
- 5 A
- 3 A
The Correct Option is B
Solution and Explanation
Top Questions on Electrochemical Cells
Assertion (A): Cu cannot liberate \( H_2 \) on reaction with dilute mineral acids.
Reason (R): Cu has positive electrode potential.- CBSE Class XII - 2025
- Chemistry
- Electrochemical Cells
The elements of the 3d transition series are given as: Sc, Ti, V, Cr, Mn, Fe, Co, Ni, Cu, Zn. Answer the following:
Copper has an exceptionally positive \( E^\circ_{\text{M}^{2+}/\text{M}} \) value, why?
- CBSE Class XII - 2025
- Chemistry
- Electrochemical Cells
In the above diagram, the standard electrode potentials are given in volts (over the arrow). The value of \( E^\circ_{\text{FeO}_4^{2-}/\text{Fe}^{2+}} \) is:
- JEE Main - 2025
- Chemistry
- Electrochemical Cells
Consider the following electrochemical cell at standard condition. $$ \text{Au(s) | QH}_2\text{ | QH}_X(0.01 M) \, \text{| Ag(1M) | Ag(s) } \, E_{\text{cell}} = +0.4V $$ The couple QH/Q represents quinhydrone electrode, the half cell reaction is given below: $$ \text{QH}_2 \rightarrow \text{Q} + 2e^- + 2H^+ \, E^\circ_{\text{QH}/\text{Q}} = +0.7V $$
- JEE Main - 2025
- Chemistry
- Electrochemical Cells
- Want to practice more? Try solving extra ecology questions todayView All Questions
