IIT JEE Chemistry Practice Paper – Part 8 – Electrochemistry – PYQ

IIT JEE Chemistry Practice Paper – Previous Years’ Questions

Part 8: Electrochemistry

1. The standard electrode potential of Zn²⁺/Zn is -0.76 V and that of Cu²⁺/Cu is +0.34 V. The EMF of the cell Zn | Zn²⁺ || Cu²⁺ | Cu is:
   a) 0.58 V
   b) 1.10 V
   c) 1.50 V
   d) 0.42 V
   
2. In the electrolysis of aqueous NaCl solution, the gas liberated at the cathode is:
   a) Oxygen
   b) Hydrogen
   c) Chlorine
   d) Nitrogen
   
3. The equivalent conductance of a strong electrolyte at infinite dilution is denoted as:
   a) Λ_m⁰
   b) λ_m
   c) K_m
   d) Λ_c
   
4. The electrochemical equivalent of an element is directly proportional to:
   a) Equivalent weight
   b) Atomic weight
   c) Valency
   d) Density
   
5. Faraday’s first law of electrolysis states that:
   a) Mass deposited is independent of electricity passed
   b) Mass deposited ∝ Quantity of electricity passed
   c) Mass deposited ∝ Voltage applied
   d) Mass deposited depends only on temperature
   
6. Conductivity of a solution decreases with:
   a) Increase in dilution
   b) Increase in concentration
   c) Increase in temperature
   d) None of these
   
7. The unit of molar conductivity is:
   a) S m² mol^-1
   b) Ω^-1 cm² mol^-1
   c) Both a and b
   d) J mol^-1
   
8. The product formed at the anode during electrolysis of molten NaCl is:
   a) Sodium
   b) Chlorine
   c) Oxygen
   d) Hydrogen
   
9. The standard electrode potential of hydrogen electrode is:
   a) +1.00 V
   b) 0.00 V
   c) -1.00 V
   d) +0.76 V
   
10. Kohlrausch’s law is useful in determining:
    a) Equivalent conductivity of weak electrolytes
    b) Solubility product
    c) Degree of dissociation
    d) All of the above