Quantrex Quantrex AcademyJEE · NEET · NDA PYQs with solutions Open app
Olympiad workbookNSECElectrochemistry

The standard potentials (E^ ) of MnO ₄⁻ / Mn ²⁺ and MnO ₂ / Mn ²⁺ half cells in acidic medium are 1.51 V and 1.23 V respectively at 298 K . The standard potential of MnO ₄⁻ / MnO ₂ half-cell in acidic medium at the same temperature is

Options

  1. A5.09 V
  2. B1.70 V
  3. C0.28 V
  4. D3.34 V

Correct answer

B. 1.70 V

Step-by-step solution

No Solution

Practice Electrochemistry on Quantrex Academy →

More from Electrochemistry

NaOH solution is added dropwise to HCl solution and the conductance of the mixture is measured after addition of each drop. The variation of conductance with volume of NaOH added iReaction E ₀ / V Ag Ag ⁺+ e ⁻ -0.80 Cr ³⁺+3 e ⁻ 3 Cr -0.74 Zn ²⁺+2 e ⁻ Zn -0.76 I ₂( ~s )+2 e ⁻ 2 I ⁻ 0.54 Co ²⁺+2 e ⁻ Co -0.28 Ni ²⁺+2 e ⁻ Ni -0.26 The best reducing agent among tWhen a medal is electroplated with silver (Ag)Given the E₀ values for the half reactions: aligned & Sn ⁴⁺+2 e ⁻ Sn ²⁺, 0.15 ~V & 2 Hg ²⁺+2 e ⁻ Hg ₂²⁺, 0.92 ~V & PbO ₂+4 H ⁺+2 e ⁻ Pb ²⁺+2 H ₂ O , 1.45 ~V aligned Which of the foReaction E ₀ / V Ag Ag ⁺+ e ⁻ -0.80 Cr ³⁺+3 e ⁻ 3 Cr -0.74 Zn ²⁺+2 e ⁻ Zn -0.76 I ₂( ~s )+2 e ⁻ 2 I ⁻ 0.54 Co ²⁺+2 e ⁻ Co -0.28 Ni ²⁺+2 e ⁻ Ni -0.26 E ^0 of the given cell is arrayWhich of the following statements is not correct regarding the galvanic cells?The standard electrode potential ( E ^0 ) of the Daniel cell is 1.1 V and the overall cell reaction can be represented as Zn ( s )+ Cu ²⁺( aq ) Zn ²⁺( aq )+ Cu ( s ) . Under which The standard redox potential for the reaction 2 H ₂ O O ₂+4 H ⁺+4 e ⁻ is -1.23 V . If the same reaction is carried out at 25^ C and at pH =7 , the potential will be Full Electrochemistry list All Olympiad workbook PYQs