Answer
Option C= It must generate hydroxide ions in water
Explanation
An Arrhenius base is a substance that, when dissolved in an aqueous solution, increases the concentration of hydroxide, or OH-, ions in the solution. An aqueous solution is a solution that has water present in it.
Example
A base, sodium hydroxide, is added to an aqueous solution. It dissociates into sodium, Na+, and hydroxide, OH-, ions. Because the hydroxide ions are released in the aqueous solution, the hydroxide concentration increases; therefore, NaOH is an Arrhenius base.
Chemical equation
NaOH (s) → Na+ (aq) + OH– (aq)
