The mass of an ion liberated at an electrode is directly proportional to the quantity of electricity. The statement is associated with____________?

Related Mcqs:

1. Those substances of the cell which take active part in chemical combination and hence produce electricity during charging or discharging are known as________materials

   A. passive
   B. active
   C. redundant
   D. inert

2. The active materials of a nickel-iron battery are___________?

   A. nickel hydroxide
   B. powdered iron and its oxide
   C. 21% solution of KOH
   D. all of the above

3. A dead storage battery can be revived by___________?

   A. adding distilled water
   B. adding so-called battery restorer
   C. a dose of H2SO4
   D. none of the above

4. The watt-hour efficiency of a lead-acid cell varies between________?

   A. 25 to 35%
   B. 40 to 60%
   C. 70 to 80%
   D. 90 to 95%

5. On the average the ampere-hour efficiency of an Edison cell is about__________?

   A. 40%
   B. 60%
   C. 70%
   D. 80%

6. The lead-acid cell should never be discharged beyond____________?

   A. 1.8 V
   B. 1.9 V
   C. 2 V
   D. 2.1 V

7. In a lead-acid cell, lead is called as____________?

   A. positive active material
   B. negative active material
   C. passive material
   D. none of the above

8. If a lead-acid cell is discharged below 1.8 V the following will happen.____________?

   A. Capacity of cell will reduce
   B. Sulphation of plates will occur
   C. Internal resistance will increase
   D. All above will occur

9. Weston standard cell at 20°C has voltage of _______ volts

   A. 0.8
   B. 0.9
   C. 1.0187
   D. 1.5

10. Which among the following constitutes the major load for an automobile battery _________?

    A. Brake light
    B. Self starter
    C. Parking lights
    D. Spark plugs