Which of the following are present in a dilute aqueous solution of hydrochloric acid?

(A) H 3 O +  + Cl

(B) H 3 O + OH

(C) Cl + OH

(D) unionised HCl



  • Since HCl is an electrolyte , it dissociates into ions when added to water. 
  • Therefore, in dilute aqueous solution, HCl exists as H 3 O + and Cl - .

The ionisation of HCl in water is given below:

Reaction of HCl with Water - Teachoo.jpg

So, the correct option is (a) H 3 O +  + Cl

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Maninder Singh

CA Maninder Singh is a Chartered Accountant for the past 13 years and a teacher from the past 17 years. He teaches Science, Economics, Accounting and English at Teachoo