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Electrochemistr...

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  • Question 1
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    Emf of the cell  

    Mg (s) | Mg2+  (0.001M) || Cu2+ (0.0001M) | Cu(s)  at 298 K is

     

  • Question 2
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    Emf of the cell  

    Fe (s) | Fe2+  (0.001 M)|| H+ (1M)|H2  (g) (1 bar) |Pt(s)  at 298 K is

    (Given: Eocell   ​= +0.44  V)

     

  • Question 3
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    The conductivity of 0.20 M solution of KCl at 298 K is 0.0248 S  cm-1 . Calculate its molar conductivity. 

     

  • Question 4
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    The resistance of a conductivity cell containing 0.001M KCl solution at 298 K is 1500 Ω. What is the cell constant if conductivity of 0.001M KCl solution at 298 K is 0.146 ×10-3  S cm-1 .

     

  • Question 5
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    How much charge is required for the reduction of 1 mol of Al3+  to Al?

     

  • Question 6
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    How much electricity in terms of Faraday is required to produce 40.0 g of Al from molten  Al 2O3 ?

     

  • Question 7
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    Three electrolytic cells A, B, C containing solutions of ZnSO4 , AgNO3 and CuSO4 , respectively are connected in series. A steady current of 1.5 amperes was passed through them until 1.45 g of silver deposited at the cathode of cell. How long did the current flow? What mass of copper and zinc were deposited?  

     

  • Question 8
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    The standard emf of galvanic cell involving 3 moles of electrons in its redox reaction is 0.59 V. The equilibrium constant for the reaction of the cell is

     

  • Question 9
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    An increase in equivalent conductance of a strong electrolyte with dilution is mainly due to

     

  • Question 10
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    For the reduction of silver ions with copper metal the standard cell potential was found to be +0.46V at 25 °C. The value of standard Gibbs energy, ΔG °wll be (F = 96500 C mol-1 )

     

  • Question 11
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    Which of the following electrolytic solutions has the least specific conductance?

     

  • Question 12
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    The highest electrical conductivity of the following aqueous solutions is of

     

  • Question 13
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    The standard electrode potential is measured by

     

  • Question 14
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    When KMnO4 acts as an oxidizing agent and ultimately forms MnO42- , MnO2 , Mn2 O3 , and Mn2+  then the number of electrons transferred in each case 

     

  • Question 15
    1 / -0.25

     

    On the basis of the following E °values, the strongest oxidizing agent is: 

     

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