ELECTROLYSIS AND STORAGE BATTERIES QUIZ

Which of the following has lower sp. gravity V

Water

Concentrated H₂SO₄

Dilute H₂SO₄

All of the listed here

TRUE ANSWER : ?
YOUR ANSWER : ?

Excessive charging a battery tends to

increase the internal resistance of the battery

produce gassing

to corrode the positive plates into lead peroxide thereby weakening them physically

bring about all above changes

TRUE ANSWER : ?
YOUR ANSWER : ?

Capacity of dry cells is

more when it is supplying current for continuous periods

None of these

more when it is supplying current for intermittent periods

unaffected by the type of discharge

TRUE ANSWER : ?
YOUR ANSWER : ?

48 ampere-hour capacity would deliver a current of

8 amperes for 6 hours

48 amperes for 1 hour

24 amperes for 2 hours

6 amperes for 8 hours

TRUE ANSWER : ?
YOUR ANSWER : ?

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

two parts H2O, two parts H₂SO₄

one part H2O, three parts H₂SO₄

all H₂SO₄

three parts H2O, one part H₂SO₄

TRUE ANSWER : ?
YOUR ANSWER : ?

In a lead-acid cell, lead is called as

positive active material

None of the listed here

negative active material

passive material

TRUE ANSWER : ?
YOUR ANSWER : ?

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

Temperature of surroundings

All of these

Rate of discharge

Specific gravity of electrolyte

TRUE ANSWER : ?
YOUR ANSWER : ?

Negative plate of an Edison cell is made of

silver oxide

copper

iron

lead

TRUE ANSWER : ?
YOUR ANSWER : ?

The active material of the positive plates of silver-zinc batteries is

silver oxide

lead oxide

lead

zinc powder

TRUE ANSWER : ?
YOUR ANSWER : ?

The ampere-hour efficiency of a leadacid cell is normally between

80 to 85%

90 to 95%

20 to 35%

70 to 75%

TRUE ANSWER : ?
YOUR ANSWER : ?