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electrolysis and storage of batteries MCQs

Practise focused electrolysis and storage of batteries questions with marked answers for exam preparation and subject revision.

electrolysis and storage of batteries Mcqs
1. For a cell to work, which of the following condition(s) become necessary ___________?
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A. Two electrodes of different metas should be inserted in the electrolyte, not touching each other

B. All above three conditions are necessary

C. Electrolyte must chemically react with one of the electrodes

D. Electrolyte liquid or paste should be conducting

2. Cell short circuit results in_________?
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A. reduced gassing on charge

B. abnormal high temperature

C. low sp. gravity electrolyte

D. all above
3. It is noticed that durum charging___________?
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A. the anode becomes chocolate brown in colour (PbCfe) and cathode becomes grey metallic lead (Pb)

B. all of the above

C. energy is absorbed by the cell

D. specific gravity of H2SO4 is increased

E. there is a rise in voltage

4. During the charging of a lead-acid cell__________?
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A. specific gravity of H2SO4 decreases

B. its voltage increases

C. its cathode becomes dark chocolate brown in colour

D. it gives out energy

5. Level of electrolyte in a cell should be ________ the level of plates
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A. above

B. equal to

C. none of the above

D. below

6. Which among the following constitutes the major load for an automobile battery _________?
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A. Self starter

B. Brake light

C. Parking lights

D. Spark plugs

7. It is noticed that during discharging the following does not happen___________?
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A. both anode and cathode become PbS04

B. specific gravity of H2SO4 decreases

C. voltage of the cell decreases

D. the cell absorbs energy

8. As compared to a lead-acid cell, the efficiency of a nickel-iron cell is less due to its__________?
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A. lower e.m.f.

B. higher internal resistance

C. small quantity of electrolyte used

D. compactness

9. The open circuit voltage of any storage cell depends wholly upon___________?
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A. its chemical constituents

B. its temperature

C. on the strength of its electrolyte

D. all above
10. Capacity of dry cells is_________?
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A. none of the above

B. unaffected by the type of discharge

C. more when it is supplying current for intermittent periods

D. more when it is supplying current for continuous periods

11. Shelf life of a small dry cell is___________?
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A. less than that of large dry cell

B. none of the above

C. equal to that of large dry cell

D. more than that of large dry cell

12. Charging of sulfated battery produces _________ heat
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A. very little

B. less

C. more

D. no

13. In a lead-acid cell, lead is called as____________?
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A. none of the above

B. passive material

C. negative active material

D. positive active material

14. In constant-current charging method, the supply voltage from discharged to fully charged condition____________?
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A. decreases

B. remains constant

C. none of the above

D. increases
15. A typical output of a solar cell is_____________?
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A. 0.26 V

B. 2 V

C. 0.1V

D. 1.1 V

16. Internal short circuits are caused by___________?
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A. breakdown of one or more separators

B. excess accumulation of sediment at the bottom of the cell

C. both (A) and (B)

D. none of the above

17. When the lead-acid cell is fully charged, the electrolyte assumes _______ appearance
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A. reddish

B. bright

C. dull

D. milky
18. Life of the batteries is in the following ascending order____________?
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A. Nickel-cadmium cell, Edison cell, lead-acid cell

B. Lead-acid cell, Nickel-cadmium cell, Edison cell

C. Edison cell, Nickel-cadmium cell, lead-acid cell

D. Lead-acid cell, Edison cell, Nickel cadmium cell
19. Specific gravity of electrolyte in Edison cell is_____________?
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A. 0.8

B. 1.1

C. 0.95

D. 1.21
20. Battery charging equipment is generally installed______________?
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A. as near as practical to the battery being charged

B. in clean and dry place

C. in location having all above features

D. in well ventilated location