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Question

Which base is employed as the electrolyte in alkaline batteries?
  1. Ca(OH)2
  2. Al(OH)3
  3. FeOH
  4. KOH

A
KOH
B
Ca(OH)2
C
Al(OH)3
D
FeOH
Solution
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Aqueous potassium hydroxide is employed as the electrolyte in alkaline batteries based on nickel-cadmium, nickel-hydrogen, and manganese dioxide-zinc. Potassium hydroxide is preferred over sodium hydroxide because its solutions are more conductive.

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