Electrolysis and storage of batteries

21. Following will happen if battery charging rate is too high

excessive gassing will occur
temperature rise will occur
bulging and buckling of plates will occur
all above will occur

Detailed SolutionFollowing will happen if battery charging rate is too high

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

Capacity of cell will reduce
Sulphation of plates will occur
Internal resistance will increase
All above will occur

Detailed SolutionIf a lead-acid cell is discharged below 1.8 V the following will happen.

23. Which of the following cell has a reversible chemical reaction ?

Lead-acid
Mercury oxide
Carbon-zinc
Silver-oxide

Detailed SolutionWhich of the following cell has a reversible chemical reaction ?

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

passive
active
redundant
inert

Detailed SolutionThose substances of the cell which take active part in chemical combination and hence produce electricity during charging or discharging are known as______materials.

25. Following will occur if level of electrolyte falls below plates

capacity of the cell is reduced
life of the cell is reduced
open plates are converted to lead sulphate
all above

Detailed SolutionFollowing will occur if level of electrolyte falls below plates

26. It is noticed that durum charging

There is a rise in voltage
Energy is absorbed by the cell
Specific gravity of H2SO4 is increased
The anode becomes chocolate brown in colour (PbCfe) and cathode becomes grey metallic lead (Pb) E. All of the above

Detailed SolutionIt is noticed that durum charging

27. During the idle period of the battery, strong electrolyte tends to change the active material of the cell into

PbO2
PbSC4
PbO
Pb

Detailed SolutionDuring the idle period of the battery, strong electrolyte tends to change the active material of the cell into

28. Which of the following factors adversely affects the capacity of the leadacid battery ?

Temperature of surroundings
Specific gravity of electrolyte
Rate of discharge
All of the above

Detailed SolutionWhich of the following factors adversely affects the capacity of the leadacid battery ?

29. Five 2 V cells are connected in parallel. The output voltage is

1 V
1.5 V
1.75 V
2 V

Detailed SolutionFive 2 V cells are connected in parallel. The output voltage is

30. The substances which combine together to store electrical energy during the charge are called ______ materials

active
passive
inert
dielectric

Detailed SolutionThe substances which combine together to store electrical energy during the charge are called ______ materials

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