CBSE  /  Class 12  /  Chemistry  /  Electrochemistry

  • 1. 
    If 96500 coulomb electricity is passed through CuSO solution, it will liberate

  • 63.5 gm of Cu
  • 31.76 gm of Cu
  • 96500 gm of Cu
  • 100 gm of Cu

  • 2. 
    Fused NaCl on electrolysis gives ………….. on cathode.

  • Chlroine
  • Sodium
  • Sodium amalgam
  • Hydrogen

  • 3. 
    The standard electrode potentials for the half cell reactions are:

  • -0.35 V
  • +0.35 V
  • -1.17 V
  • +1.17 V

  • 4. 
    Which of the following is a secondary cell?

  • Leclanche cell
  • Lead storage battery
  • Concentration cell
  • All of these

  • 5. 
    For a certain redox reaction, E° is positive. This means that

  • ΔG° is positive, K is greater than 1
  • ΔG° is positive, K is less than 1
  • ΔG° is negative, K is greater than 1
  • ΔG° is negative, K is less than 1

  • 6. 
    Cell reaction is spontaneous, when

  • E\(_{red}^{0}\) is negative
  • ΔG° is negative
  • E\(_{oxid}^{0}\) is Positive
  • ΔG° is positive

  • 7. 
    Equilibrium constant K is related to E\(_{cell}^{0}\) and not E\(_{cell}\) because

  • E\(_{cell}^{0}\) is easier to measure than E\(_{cell}\)
  • E\(_{cell}\) becomes zero at equilibrium point but E\(_{cell}^{0}\) remains constant under all conditions
  • at a given temperature, E\(_{cell}\) changes hence value of K can’t be measured
  • any of the terms E\(_{cell}\) or E\(_{cell}^{0}\) can be used

  • 8. 
    Molar conductivity of 0.15 M solution of KCl at 298 K, if its conductivity of 0.0152 S cm

  • 124 Ω
  • 204 Ω
  • 101 Ω
  • 300 Ω

  • 9. 
    Electrical conductance through metals is called metallic or electronic conductance and is due to the movement of electrons. The electronic conductance depends on

  • the nature and structure of the metal
  • the number of valence electrons per atom
  • change in temperature
  • all of these

  • 10. 
    The specific conductivity of N/10 KCl solution at 20°C is 0.0212 ohm

  • 3.324 cm
  • 1.166 cm
  • 2.372 cm
  • 3.682 cm
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