JEE Chemistry - MCQ Practice Questions

The conductivity of a solution decreased upon dilution. This is because:

In the electrolysis of molten NaCl using inert electrodes, what is produced 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)

In a Daniel cell, the mass of zinc electrode decreases and copper electrode increases. This indicates:

The relationship between equivalent conductance (Λ) and molar conductance (Λm) is:

The standard reduction potential of H⁺/H₂ electrode is taken as 0.00 V because:

During the electrolysis of aqueous CuSO₄ solution with copper electrodes, which reaction occurs at the cathode?

The Gibbs free energy change for an electrochemical cell reaction is related to cell potential by:

In the electrorefining of copper, impure copper acts as:

What is the effect of temperature on the conductivity of ionic solutions?

The electrochemical series is based on which property?

In the electrolysis of dilute H₂SO₄ with inert electrodes, if 2 moles of electrons flow, what volume of gases (in liters at STP) will be produced?

The cell potential of a galvanic cell decreases during operation because:

Which factor does NOT significantly affect the conductance of an electrolytic solution?

For the reaction: Fe³⁺ + e⁻ → Fe²⁺ (E° = +0.77 V) and Cl₂ + 2e⁻ → 2Cl⁻ (E° = +1.36 V), which is the strongest oxidizing agent?

In an electrochemical cell at 25°C, if E°cell = +0.30 V and the cell quotient Q = 10, the cell potential using Nernst equation (n=2) is approximately:

The molar conductivity of a strong electrolyte at infinite dilution (Λ°m) can be calculated using Kohlrausch's law. For NaCl, if Λ°m(HCl) = 426, Λ°m(NaOH) = 248, and Λ°m(KCl) = 150, then Λ°m(NaCl) is:

During the electrolysis of molten NaCl using inert electrodes, if 2.3 g of Na is deposited at the cathode, what volume of Cl₂ gas (at STP) will be released at the anode?

A galvanic cell is constructed using Zn|Zn²⁺ and Cu|Cu²⁺ half-cells. If the concentration of Zn²⁺ is increased from 1 M to 10 M at 25°C, how does this affect the cell potential? (E°cell = 1.1 V)