Electrolysis and storage of batteries

11. The common impurity in the electrolyte of lead-acid battery is

chlorine
dust particles
lead crystals
iron

Detailed SolutionThe common impurity in the electrolyte of lead-acid battery is

12. Which of the following battery is used for aircraft ?

Lead-acid battery
Nickel-iron battery
Dry cell battery
Silver oxide battery

Detailed SolutionWhich of the following battery is used for aircraft ?

13. Petroleum jelly is applied to the electrical connections to the lead-acid battery

prevent local heating
prevent short-circuiting
reduce path resistance
prevent corrosion

Detailed SolutionPetroleum jelly is applied to the electrical connections to the lead-acid battery

14. A dead storage battery can be revived by

Adding distilled water
Adding so-called battery restorer
A dose of H2SO4
None of the above

Detailed SolutionA dead storage battery can be revived by

15. Lead-acid cell has a life of nearly charges and discharges

500
700
1000
1250

Detailed SolutionLead-acid cell has a life of nearly charges and discharges

16. On overcharging a battery

It will bring about chemical change in active materials
It will increase the capacity of the battery
It will raise the specific gravity of the electrolyte
None of the above will occur

Detailed SolutionOn overcharging a battery

17. It is noticed that during discharging the following does not happen

Both anode and cathode become PbSO4
Specific gravity of H2SO4 decreases
Voltage of the cell decreases
The cell absorbs energy

Detailed SolutionIt is noticed that during discharging the following does not happen

18. 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

Detailed SolutionCapacity of dry cells is

19. Trickle charging of a storage battery helps to

maintain proper electrolyte level
increase its reserve capacity
prevent sulphation
keep it fresh and fully charged

Detailed SolutionTrickle charging of a storage battery helps to

20. Cells are connected in series in order to

increase the voltage rating
increase the current rating
increase the life of the cells
none of the above

Detailed SolutionCells are connected in series in order to

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