One faraday of electricity is passed separately through one litre of one molar aqueous solution of (i) AgNO3, (ii) SnCl4 and (iii) CuSO4. The number of moles of Ag, Sn and Cu deposited at cathode are respectively
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Standard free energies of formation (in kJ/mol) at 298 K are –237.2, –394.4 and –8.2 for H2O(l), CO2(g) and pentane(g), respectively. The value of Eo |
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The standard reduction potentials of Zn2+ | Zn, Cu2+ | Cu and Ag+ | Ag are respectively –0.76, 0.34 and 0.8V. The following cells were constructed. a) Zn | Zn2+ || Cu2+ | Cu b) Zn | Zn2+ || Ag+ | Ag c) Cu | Cu2+ || Ag+ | Ag What is the correct order Eo |
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The standard electrode potential is measured by ______. |
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Corrosion of iron is essentially an electrochemical phenomenon where the cell reaction are ______. |
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A button cell used in watches functions as follows: Zn(s) + Ag2O(s) + H2O(l) → 2Ag(s) + Zn2+(aq) + 2OH– (aq) If half cell potentials are Zn2+ (aq) + 2e– → Zn(s); E° = –0.76 V Ag2O(s) + H2O(l) + 2e– → 2Ag(s)+ 2OH–(aq), E° = 0.34 V The cell potential will be |
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Aluminium displaces hydrogen from dilute HCl whereas silver does not. The E.M.F. of a cell prepared by combining Al/Al+3 and Ag/Ag+ is 2.46 V. The reduction potential of silver electrode is + 0.80 V. The reduction potential of aluminium electrode is: |
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The reduction potential values of X, Y and Z are –3.05 V, –0.44 V and –0.83 V respectively. Which of the following order is correct with respect to their reducing property? |
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For a cell reaction involving two electrons change, the standard e.m.f. of the cell is found to be 0.295 V at 25°C. The equilibrium constant of the reaction at 25°C is |
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When KMnO4 acts as an oxidizing agent and ultimately forms MnO2– |
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What is the time (in sec) required for deposition all the silver present in 125mL of 1 MAgNO3 solution by passing a current of 241.25 amperes? (1F = 96500 coulombs) |
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