Practice Electrolysis And Storage Of Batteries Multiple Choice Questions with Answers Quiz-6

Q.1.

The average charging voltage for alkali cell is about

1 V
1.2 V
1.7 V
2.1 V

Q.2.

Capacity of dry cells is

more when it is supplying current for intermittent periods
more when it is supplying current for continuous periods
unaffected by the type of discharge
none of the above

Q.3.

Persons preparing electrolyte should wear

goggles or other face shield
rubber
rubber boots and gloves
all above safety devices

Q.4.

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

Q.5.

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

Q.6.

The watt-hour efficiency of a lead-acid cell varies between

25 to 35%
40 to 60%
70 to 80%
90 to 95%

Q.7.

The capacity of a lead-acid cell is measured in

amperes
ampere-hours
watts
watt-hours

Q.8.

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

output voltage
temperature of electrolyte
specific gravity of electrolyte
none of the above

Q.9.

Electrolyte used in a lead-acid cell is

NaOH
only H₂SO₄
only water
dilute H₂SO₄

Q.10.

The ratio of ampere-hour efficiency to watt-hour efficiency of a lead-acid cell is

just one
always greater than one
always less than one
none of the above

Q.11.

While preparing electrolyte for a lead-acid battery

water is poured into acid
acid is poured into water
anyone of the two can be added to other chemical
none of the above

Q.12.

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

20 to 30%
40 to 50%
60 to 70%
90 to 95%

Q.13.

Which of the following has lower sp. gravity V

Dilute H₂SO₄
Concentrated H₂SO₄
Water
Any of the above

Q.14.

During the charging of a lead-acid cell

its voltage increases
it gives out energy
its cathode becomes dark chocolate brown in colour
specific gravity of H₂SO₄ decreases

Q.15.

Chargmg of sulphated battery produces ____ heat.

no
very little
less
more

Q.16.

The lead-acid cell should never be discharged beyond

1.8 V
1.9 V
2 V
2.1 V

Q.17.

Life of the batteries is in the following ascending order.

Lead-acid cell, Edison cell, Nickel cadmium cell
Lead-acid cell, Nickel-cadmium cell, Edison cell
Edison cell, Nickel-cadmium cell, lead-acid cell
Nickel-cadmium cell, Edison cell, lead-acid cell

Q.18.

During charging the specific gravity of the electrolyte of a lead-acid battery

increases
decreases
remains the same
becomes zero

Q.19.

As compared to a lead-acid cell, the efficiency of a nickel-iron cell is less due to its

compactness
lower e.m.f.
small quantity of electrolyte used
higher internal resistance

Q.20.

The active materials of a nickel-iron battery are

nickel hydroxide
powdered iron and its oxide
21% solution of kOH
all of the above

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