Latest Electrolysis and Storage of Batteries Multiple choice Questions and Answers pdf

31. The internal resistance of an alkali cell is nearly _____ times that of the lead-acid cell.
(a) two
(b) three
(c) four
(d) five
Ans: d

32. The average charging voltage for alkali cell is about
(a) 1 V
(b) 1.2 V
(c) 1.7 V
(d) 2.1 V
Ans: c

33. On the average the ampere-hour efficiency of an Edison cell is about
(a) 40%
(b) 60%
(c) 70%
(d) 80%
Ans: d

34. The active material of the positive plates of silver-zinc batteries is
(a) silver oxide    
(b) lead oxide
(c) lead
(d) zinc powder
Ans: a

35. Lead-acid cell has a life of nearly charges and discharges
(a) 500
(b) 700
(c) 1000
(d) 1250
Ans: d

36. Life of the Edison cell is at least
(a) five years
(b) seven years
(c) eight years
(d) ten years
Ans: a

37. The internal resistance of a lead-acid cell is _____ that of Edison cell
(a)    less than
(b)    more than
(c) equal to
(d) none of the above
Ans: a

38. Electrolyte used in an Edison cell is
(a) NaOH
(b) KOH
(c) HC1
(d) HN03
Ans: b

39. Electrolyte used in a lead-acid cell is
(a) NaOH
(b) onlyH2S04
(c) only water      
(d) dilute H2SO4
Ans: d

40. Negative plate of an Edison cell is made of
(a) copper
(b) lead
(c) iron
(d) silver oxide
Ans: c

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