Multiple choice

The potassium hydroxide acts as a electrolyte in

  1. a nickel-cadmium battery

  2. a nickel hydrogen battery

  3. a nickel-metal hydride cell

  4. a nickel-iron battery

Reveal answer Fill a bubble to check yourself
D Correct answer
Explanation

The nickel-iron battery (NiFe battery) is a storage battery having a nickel(III) oxide-hydroxide cathode and an iron anode, with an electrolyte of potassium hydroxide. The active materials are held in nickel-plated steel tubes or perforated pockets.