Exams › JEE Main › Chemistry

The standard reduction potentials for the couples Cu2+/Cu and Cu+/Cu are 0.34 V and 0.522 V, respectively. What is the standard potential for the Cu2+/Cu+ couple?

1. +0.182 V
2. +0.158 V
3. −0.182 V
4. −0.158 V

Correct answer: +0.158 V

Solution

The standard potential for the Cu2+/Cu+ couple can be calculated using the difference between the standard reduction potentials of Cu+/Cu and Cu2+/Cu. By subtracting the potential of Cu2+/Cu from that of Cu+/Cu, we find that the standard potential for the Cu2+/Cu+ couple is +0.158 V.

Related JEE Main Chemistry questions

• During electrolysis of an aqueous solution of dipotassium succinate, which gas is evolved at the electrodes?
• Which expression gives the equivalent conductance at infinite dilution of Al2(SO4)3, if Λ°Al3+ and Λ°SO4²− denote the equivalent conductances at infinite dilution of the corresponding ions?
• The standard emf of a Daniell cell is 1.10 V. What is the greatest amount of electrical work that can be extracted from this cell?
• During the recharging of a lead storage battery, which reaction takes place at the cathode?
• The limiting molar ionic conductivities of the ions X2+ and Y2− are 57 and 73, respectively. What will be the molar conductivity of the electrolyte formed by these ions?
• According to Kohlrausch’s law, at what condition does each ion contribute a fixed amount to the conductance of an electrolyte, irrespective of the other ion present?

⚔️ Practice JEE Main Chemistry free + battle 1v1 →