Question 29 - MCQs from NCERT Exemplar - Chapter 2 Class 10 - Acids, Bases and Salts

Last updated at August 14, 2026 by

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

 

Answer

  • 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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