Q12 of 53 Page 61

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

When HCl is added to water it is dissociated to give H+ ions which combines with water molecules to give H3O+ and Cl– remains after the dissociation in the solution.

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10

The compound which is used for removing permanent hardness of water is:

 11

Common salt besides being used in kitchen can also be used as the raw material for making:

(i) washing soda


(ii) bleaching powder


(iii) baking soda


(iv) slaked lime

 13

Which of the following statements is correct about an aqueous solution of an acid and of a base?

(i) Higher the pH, stronger the acid


(ii) Higher the pH, weaker the acid


(iii) Lower the pH, stronger the base


(iv) Lower the pH, weaker the base

 14

Sodium carbonate is a basic salt because it is a salt of: