Question

Which base is employed as the electrolyte in alkaline batteries?
 A.$Ca{\left( {OH} \right)_2}$
 B.$Al{\left( {OH} \right)_3}$
 C.$FeOH$
 D.$KOH$

Answer 1

Hint: We have to know that, an alkaline battery is a sort of a dry cell essential battery that uses the compound response of zinc and magnesium oxide and a soluble electrolyte of potassium hydroxide to create electric flow. It is at present the most famous kind of expendable battery on the lookout.

Complete answer:
For calcium hydroxide,
We have to know that, it is normally alluded to as slaked lime or hydrated lime; calcium hydroxide is framed because of hydrating lime (calcium oxide). Lime is by a long shot the most financially positive antacid reagent to use for corrosive balance.
Therefore, option (A) is incorrect.
For aluminum hydroxide,
We have to know that, Aluminum hydroxide is additionally called Aluminic corrosive or Aluminium hydroxide or Aluminum hydroxide. It is found in nature as mineral gibbsite and its polymorphs viz doyleite, nordstrandite, and bayerite. Aluminium hydroxide is a nebulous powder white. It is insoluble in water yet solvent in basic and acidic arrangements.
Therefore, option (B) is incorrect.
For iron hydroxide,
We have to know that iron hydroxide or ferrous hydroxide is an inorganic compound with the equation $FeOH$. It is delivered when iron salts, from a compound like iron sulfate, are treated with hydroxide particles. Iron hydroxide is a white strong, yet even hints of oxygen bestow a greenish hint. The air-oxidized strong is in some cases known as "green rust".
Therefore, option (C) is incorrect.
For potassium hydroxide,
We have to know that, the aqueous potassium hydroxide is utilized as the electrolyte in soluble batteries dependent on nickel-cadmium, nickel-hydrogen, and manganese dioxide-zinc. Potassium hydroxide is liked over sodium hydroxide since its answers are more conductive.

Therefore, option (D) is correct.

Note:
We have to know that, since soluble batteries give more energy than zinc batteries, you should utilize the basic cells for apparatuses, for example, tooth brushes, toys and game regulators.