#### Electro Chemistry Two Marks Question

12th Standard EM

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Chemistry

Time : 00:45:00 Hrs
Total Marks : 22
11 x 2 = 22
1. Define anode and cathode

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

3. State Kohlrausch Law. How is it useful to determine the molar conductivity of weak electrolyte at infinite dilution.

4. Describe the electrolysis of molten NaCl using inert electrodes

5. State Faraday’s Laws of electrolysis

6. Describe the construction of Daniel cell. Write the cell reaction.

7. Why is anode in galvanic cell considered to be negative and cathode positive electrode?

8. Which of 0.1M HCl and 0.1 M KCl do you expect to have greater and why?

9. 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.

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

11. 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 0.003M 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. Given that