Chemistry Acids, Bases, Salts Questions & Answers Pdf - 3

Question: 11

Give an account of water on crystallisation?

In crystals, the fixed number of water molecules which are in loose combination with one molecule of salt is called water of crystallisation.

Question: 12

What is neutralisation?

The reaction between an acid and a base invariably results in the formation of salts and water and it is called neutralisation.

acid + base -> Salt + Water

Question: 13

What are mineral acids and organic acids?

Acids derived from minerals are called mineral acids.

Example -> hydrochloric acid; sulphuric acid.

Acids derived from animals and plants are known as organic acids.

Example -> Citric acid; formic acid

Question: 14

What is neutralisation reaction?

The reaction between an acid and a base produces neutral compounds. Hence, this reaction is called neutralisation reaction.

Question: 15

Give some of the characteristics of chemical reaction?

Some of the characteristics of chemical reactions are

(i) Change of energy

(ii) changes of colour

(iii) evolution of a gas and

(iv) formation of precipitate

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