_________ is used to calculate theoretical weight deposited on the electrode during electrolysis.
Show Hint
- Faraday’s Law
- Hess Law
- De Bragg’s Law
- Stoke’s Law
The Correct Option is A
Solution and Explanation
Step 2: Evaluating the Options - Option (A) - Correct: Faraday’s Law accurately calculates the theoretical weight deposited during electrolysis. - Option (B) - Incorrect: Hess’s Law is related to the enthalpy changes in thermodynamics. - Option (C) - Incorrect: Bragg’s Law deals with X-ray diffraction and crystallography. - Option (D) - Incorrect: Stoke’s Law is related to the motion of particles in a fluid.
Step 3: Conclusion Since Faraday’s Law governs the calculation of mass deposited during electrolysis, the correct answer is option (A).
Top Questions on Electrochemical Cells
An electrochemical cell is fueled by the combustion of butane at 1 bar and 298 K. Its cell potential is $ \frac{X}{F} \times 10^3 $ volts, where $ F $ is the Faraday constant. The value of $ X $ is ____.
Use: Standard Gibbs energies of formation at 298 K are:
$ \Delta_f G^\circ_{CO_2} = -394 \, \text{kJ mol}^{-1}; \quad \Delta_f G^\circ_{water} = -237 \, \text{kJ mol}^{-1}; \quad \Delta_f G^\circ_{butane} = -18 \, \text{kJ mol}^{-1} $
- JEE Advanced - 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
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
- Match the following and select the correct option for the quantity of electricity, in Cmol\(^{-1}\), required to deposit various metals at the cathode.
- KCET - 2025
- Chemistry
- Electrochemical Cells
- Catalysts are used to increase the rate of a chemical reaction. Because it
- KCET - 2025
- Chemistry
- Electrochemical Cells
Questions Asked in TANCET exam
- A, P, R, X, S, and Z are sitting in a row. S and Z are in the centre. A and P are at the ends. R is sitting to the left of A. Who is to the right of P?
- TANCET - 2024
- Statements and Conclusions
- In a new temperature scale say \( ^oP \), the boiling and freezing points of water at one atmosphere are \( 100^o P \) and \( 300^o P \) respectively. Correlate this scale with the Centigrade scale. The reading of \( 0^o P \) on the Centigrade scale is:
- TANCET - 2024
- Thermodynamics
- 138, 142, 146, 150, ?, 142, 138
- TANCET - 2024
- Statements and Conclusions
- Which is odd? Tortoise, Crab, Frog, Fish
- TANCET - 2024
- Statements and Conclusions
If A + B means A is the mother of B; A - B means A is the brother of B; A % B means A is the father of B, and A \(\times\) B means A is the sister of B, which of the following shows that P is the maternal uncle of Q?
- TANCET - 2024
- Statements and Conclusions