When ammonia is dissolved in water, it forms ammonium hydroxide which is ionised.
Ammonium chloride is formed due to the reaction between Ammonium hydroxide and Hydrogen Chloride. Since HCl is a stronger acid than NH4OH, which a weak base, the salt is predominantly acidic on hydrolysis, since HCl is formed.
Worksheets for ICSE class 10 chemistry
Support Services for ICSE class 10 chemistry
Regular Classes for ICSE class 10 chemistry