Electrolysis and storage of batteries Archives - Page 9 of 10 - MCQ and Quiz for Exams

81. In alkaline cell the electrolyte is

dilute sulphuric acid

concentrated sulphuric acid

NaOH

kOH

Detailed SolutionIn alkaline cell the electrolyte is

82. 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

83. 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

84. 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

85. 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

86. Dry cell is modification of

Deniell cell

Leclanche cell

Lead-acid cell

Edison cell

Detailed SolutionDry cell is modification of

87. 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.

88. 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

89. 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

90. 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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