Concept:Weak bases partially ionize in water and produce a small amount of OH− ions.Explanation:Among the given options, only NH4OH (ammonium hydroxide) is a weak base.NaOH, KOH, and Ca(OH)2 are strong bases because they completely ionize in water.
Base Name
Type of Base
Chemical Formula
Uses
Ammonia Hydroxide
Weak
NH_{4}OH
cleanser and in manufacturing plastics, rubber, fertilizer and textiles
Sodium Hydroxide
Strong
NaOH
Manufacturing of soap, paper and rayon, oil refining and making dyes and bleaches.