ELECTROLYSIS AND STORAGE BATTERIES QUIZ

The active materials of a nickel-iron battery are

powdered iron and its oxide

nickel hydroxide

21% solution of kOH

all of these

TRUE ANSWER : ?
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The ampere-hour efficiency of a leadacid cell is normally between

80 to 85%

90 to 95%

70 to 75%

20 to 35%

TRUE ANSWER : ?
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In alkaline cell the electrolyte is

dilute sulphuric acid

kOH

concentrated sulphuric acid

NaOH

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The best indication about the state of charge on a lead-acid battery is given by

specific gravity of electrolyte

none of the listed here

temperature of electrolyte

output voltage

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Internal resistance of a cell is due to

electrode resistance

resistance of electrolyte

surface contact resistance between electrode and electrolyte

all of the listed here

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The lead-acid cell should never be discharged beyond

2.1 V

1.9 V

1.8 V

2 V

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

1.0187

1.5

1.2

0.8

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

2 V

15 V

1.5 V

10 V

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In a lead-acid cell, lead is called as

None of the listed here

passive material

positive active material

negative active material

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

all

redundant

passive

active

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