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Electrochemistry Test - 21
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Electrochemistry Test - 21
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  • Question 1/10
    4 / -1
    Small quantities of solutions of compounds TX , TY and TZ are put into separate test tubes containing X ,Y and Z solutions. TX does not react with any of these. TY reacts with both X and Z. TZ reacts with X. The decreasing order of ease of oxidation of the anions X-, Y-, Z- is
  • Question 2/10
    4 / -1

  • Question 3/10
    4 / -1
    The standard reduction potentials at 298 K for the following half-cell reactions are given
    Zn2+ (aq) + 2e- ⇌ Zn(s); -0.762 V
    Cr3+ (aq) + 3e- ⇌ Cr(s); -0.74 V
    2H+ (aq) + 2e- ⇌ H2 (g); +0.00 V
    Fe3+ (aq) + e- ⇌ Fe2+ (aq); +0.77 V
    Which one of the following is the strongest reducing agent ?
  • Question 4/10
    4 / -1
    Electrode potential of hydrogen electrode is...volt.
  • Question 5/10
    4 / -1
    The relationship between Gibbs' free energy change (∆G) and emf(E)of a reversible electrochemical cell is given by
  • Question 6/10
    4 / -1
    Zn2+ → Zn(s); Eo = -0.76 V;
    Cu2+ → Cu(s); Eo = -0.34 V
    Which of the following is spontaneous?
  • Question 7/10
    4 / -1
    The cell, Zn | Zn2+ (1 M) || Cu2+ (1 M) | Cu (Eocell = 1.10V), was allowed to be completely discharged at 298 K. The relative concentration of Zn2+to

    Solutions

  • Question 8/10
    4 / -1
    Given standard electrode potentials
    Fe2+ + 2e- → Fe Eo = - 0.440V
    Fe3+ + 3e- → Fe Eo = - 0.036 V
    the standard electrode potential (Eo) for
    Fe3+ + e- → Fe2+ is
    Solutions

  • Question 9/10
    4 / -1
    The standard Eored values of A, B and C are + 0.68 V, - 2.54 V, - 0.50 V respectively. The order of their reducing power is
  • Question 10/10
    4 / -1
    EMF of hydrogen electrode in term of pH is (at 1 atm pressure)
    Solutions

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