An alkali is a base that dissolves in-

Correct option is A

The correct answer is (a) Water.
· An alkali is a type of base that dissolves in water to produce hydroxide ions (OH⁻). Alkalis are typically water-soluble bases, such as sodium hydroxide (NaOH) and potassium hydroxide (KOH).
· When dissolved in water, alkalis raise the pH of the solution, making it basic or alkaline.
Information Booster:
· Acid: Acids and alkalis are chemical opposites. Alkalis neutralize acids but do not dissolve in them.
· Mercury: Mercury is a metal and does not dissolve bases like alkalis.
· Kerosene: Kerosene is a non-polar solvent and does not dissolve alkalis.