Q.

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

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a

Cl + OH

b

H3O+ + OH

c

un-ionised HCl

d

H3O+ + Cl

answer is A.

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Detailed Solution

Acid releases hydrogen, which combines with a water molecule to form an ion called a hydrogen atom. Since HCl is an electrolyte, adding it to water causes it to separate into ions. Therefore, HCl occurs as H3O + and Cl- in diluted aqueous solution.

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