Q2 of 53 Page 62

Write true or false for the following statements:

Acids give H3O+ or H+(aq) ion in water.

True

A substance is called an acid if it has the ability to produce H+ ions in the solution. These H+ ions combine with water molecules to give H3O+. Hence, acids give H3O+ or H+(aq) ion in water is correct.


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18

What happens when a solution of an acid is mixed with a solution of a base in a test tube?

(i) The temperature of the solution increases


(ii) The temperature of the solution decreases


(iii) The temperature of the solution remains the same


(iv) Salt formation takes place

 1

Write true or false for the following statements:

The separation of H+ ion from HCl molecules can occur in the absence of water.

 3

Write true or false for the following statements:

The process of dissolving an acid or a base in water is highly exothermic one.

 4

Write true or false for the following statements:

Care must be taken while mixing concentrated nitric acid or sulphuric acid with water. The water must always be added slowly to the acid with constant stirring.