Electrolysis and storage of batteries

31. In alkaline cell the electrolyte is

dilute sulphuric acid
concentrated sulphuric acid
NaOH
kOH

Detailed SolutionIn alkaline cell the electrolyte is

32. In a lead-acid cell dilute sulfuric acid (electrolyte) approximately comprises the following

One part H2O, three parts H2SO4
Two parts H2O, two parts H2SO4
Three parts H2O, one part H2SO4
All H2SO4

Detailed SolutionIn a lead-acid cell dilute sulfuric acid (electrolyte) approximately comprises the following

33. The e.m.f. of an Edison cell, when fully charged, is nearly

1.4 V
1 V
0.9 V
0.8 V

Detailed SolutionThe e.m.f. of an Edison cell, when fully charged, is nearly

34. The active materials on the positive and negative plates of a fully charged lead-acid battery are

lead and lead peroxide
lead sulphate and lead
lead peroxide and lead
none of the above

Detailed SolutionThe active materials on the positive and negative plates of a fully charged lead-acid battery are

35. Charging a sulphated battery at high rate results in

boiling of electrolyte due to gassing
warping of plates
damage to separators, cell caps covers and battery case due to excessive temperature
all above

Detailed SolutionCharging a sulphated battery at high rate results in

36. Dry cell is modification of

Deniell cell
Leclanche cell
Lead-acid cell
Edison cell

Detailed SolutionDry cell is modification of

37. Ampere hour capacity of an industrial battery is based on ____ hours discharge rate.

8
12
16
24

Detailed SolutionAmpere hour capacity of an industrial battery is based on ____ hours discharge rate.

38. The storage battery generally used in electric power station is

nickel-cadmium battery
zinc-carbon battery
lead-acid battery
none of the above

Detailed SolutionThe storage battery generally used in electric power station is

39. As compared to constant-current system, the constant-voltage system of charging a lead acid cell has the advantage of

reducing time of charging
increasing cell capacity
both (A) and (B)
avoiding excessive gassing

Detailed SolutionAs compared to constant-current system, the constant-voltage system of charging a lead acid cell has the advantage of

40. When two batteries are connected in parallel, it should be ensured that

they have same e.m.f.
they have same make
they have same ampere-hour capacity
they have identical internal resistance

Detailed SolutionWhen two batteries are connected in parallel, it should be ensured that

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