MHT CET202519 Apr 2025Morning ShiftChemistryElectrochemistryActual
How long should aqueous NaCl be electrolysed by passing 100 ampere current, so that 0.5 mol chlorine is released at anode?
Options
- A96500 seconds
- B9650 seconds
- C965 seconds
- D96.5 seconds
Correct answer
C. 965 seconds
Step-by-step solution
For the electrolysis of aqueous NaCl, chlorine gas forms at the anode via the reaction: 2 Cl ^- Cl ₂ + 2 e ^- Releasing 0.5 mol of Cl ₂ requires 1 mol of electrons from stoichiometry. The total charge is then Q = 1 96500 = 96500 C . Given a current of 100 A, the required time is t = 96500 100 = 965 s . Final Answer: C