JEE Chemistry - MCQ Practice Questions

Which metal cannot be obtained by electrolysis of its aqueous salt solution?

In a concentration cell with two zinc electrodes in different concentrations of Zn²⁺, which statement is true?

The molar conductivity of a solution decreases with dilution for:

What is the purpose of a salt bridge in an electrochemical cell?

For the electrode reaction: MnO₄⁻ + 8H⁺ + 5e⁻ → Mn²⁺ + 4H₂O, the number of electrons transferred in the redox reaction is:

Using the data: E°(Cu²⁺/Cu) = +0.34 V, E°(Zn²⁺/Zn) = -0.76 V, what is E°cell for the Daniell cell?

In electroplating of iron with copper, which electrode should be made of copper?

What mass of Cu is deposited when 2 Faradays of charge pass through a CuSO₄ solution? (Atomic mass of Cu = 64)

The molar conductivity of a solution increases with dilution because:

For the cell reaction: Zn + Cu²⁺ → Zn²⁺ + Cu, if E°(Zn²⁺/Zn) = -0.76 V and E°(Cu²⁺/Cu) = +0.34 V, the standard cell potential is:

When 3 Faradays of charge are passed through a solution of Cu²⁺, how many moles of Cu are deposited?

The relationship between standard Gibbs free energy change (ΔG°) and equilibrium constant (K) at 25°C is best represented by:

In the electroplating of an object with silver, which electrode should be made of silver?

The specific conductance of a solution is 0.02 S/cm and the cell constant is 1.2 cm⁻¹. The molar conductance of 0.1 M solution is:

Which of the following factors does NOT affect the rate of electrodeposition?

For a galvanic cell at 25°C, E°cell = +0.50 V and n = 2. The value of ΔG° is approximately:

The Nernst equation at 25°C for a cell reaction with n electrons transferred is given by: E = E° - (0.059/n) log Q. What does Q represent?

In the electrolysis of CuSO₄ solution with copper electrodes, what happens at the cathode?

The molar conductivity of strong electrolytes follows which relationship with concentration?

A current of 5 A is passed through an electrolytic cell for 1930 seconds. Calculate the number of moles of electrons transferred. (Faraday constant = 96500 C/mol)