Electrolysis and storage of batteries Archives

11. 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

Detailed SolutionAs compared to a lead-acid

cell, the efficiency of a nickel-iron cell is less due to its

12. 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

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lead-acid cell" class="read-more button" href="https://exam.pscnotes.com/mcq/during-the-charging-of-a-lead-acid-cell/#more-49499">Detailed Solution

13. Chargmg of sulphated battery produces ____ heat.

very little

less

Detailed SolutionChargmg

of sulphated battery produces ____ heat.

14. 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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of a nickel-iron battery are" class="read-more button" href="https://exam.pscnotes.com/mcq/the-active-materials-of-a-nickel-iron-battery-are/#more-49151">Detailed Solution

15. Internal resistance of a cell is due to

resistance of electrolyte

electrode resistance

surface contact resistance between electrode and electrolyte

all above

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class="read-more button" href="https://exam.pscnotes.com/mcq/internal-resistance-of-a-cell-is-due-to/#more-49124">Detailed Solution

16. Which of the following primary cells has the highest voltage ?

Manganese-alkaline

Carbon-zinc

Lithium

Mercury

Detailed SolutionWhich

of the following primary cells has the highest voltage ?

17. Electrolyte used in an Edison cell is

NaOH

KOH

HCl

HNO3

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64S117.2 64 74.6 75.5c-23.5 6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube href="https://exam.pscnotes.com/mcq/electrolyte-used-in-an-edison-cell-is/#more-48721">Detailed Solution

18. Short circuiting of a cell may be caused

buckling of plates

faulty separators

lead particles forming circuit between positive and negative plates

excessive accumulation of sediment E. any one of above

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47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube a cell may be caused" class="read-more button" href="https://exam.pscnotes.com/mcq/short-circuiting-of-a-cell-may-be-caused/#more-48553">Detailed Solution

19. During the charging and discharging of a nickel-iron cell

corrosive fumes are produced

water is neither formed nor absorbed

nickel hydroxide remains unsplit

its e.m.f. remains constant

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a nickel-iron cell" class="read-more button" href="https://exam.pscnotes.com/mcq/during-the-charging-and-discharging-of-a-nickel-iron-cell/#more-48484">Detailed Solution

20. The open circuit voltage of any storage cell depends wholly upon

its chemical constituents

on the strength of its electrolyte

its temperature

all above

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47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z"/> Subscribe on YouTube cell depends wholly upon" class="read-more button" href="https://exam.pscnotes.com/mcq/the-open-circuit-voltage-of-any-storage-cell-depends-wholly-upon/#more-48318">Detailed Solution

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