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Electro Chemistry 2 Mark Book Back Question Paper With Answer Key

12th Standard

    Reg.No. :
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Chemistry

Time : 00:45:00 Hrs
Total Marks : 16

    2 Marks 


    8 x 2 = 16
  1. Define anode and cathode

  2. Why does conductivity of a solution decrease on dilution of the solution.

  3. Describe the electrolysis of molten NaCl using inert electrodes

  4. Explain the function of H2 - O2 fuel cell.

  5. A solution of silver nitrate is electrolysed for 20 minutes with a current of 2 amperes. Calculate the mass of silver deposited at the cathode.

  6. A conductivity cell has two platinum electrodes separated by a distance 1.5 cm and the cross sectional area of each electrode is 4.5 sq cm. Using this cell, the resistance of 0.5 N electrolytic solution was measured as 15 Ω. Find the specific conductance of the solution.

  7. Calculate the molar conductance of 0.025M aqueous solution of calcium chloride at 25°C. The specific conductance of calcium chloride is 12.04 x 10-2 Sm-1.

  8. The resistance of a conductivity cell is measured as 190 Ω using 0.1M KCl solution (specific conductance of 0.1M KCl is 1.3 Sm-1). When the same cell is filled with 0.003 M sodium chloride solution, the measured resistance is 6.3KΩ. Both these measurements are made at a particular temperature. Calculate the specific and molar conductance of NaCl solution.

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