Chemistry Acids, Bases, Salts Questions & Answers Pdf - 2

Question: 6

Mention the physical properties of bases?

The solutions of bases are soapy to touch

They have burning taste

They dissolve in water

Caustic alkalies are highly corrosive

Alkalies turn red litmus blue

Question: 7

What is the use of slaked lime?

The slaked lime is used to prepare bleaching powder.

Slaked lime is used as a good disinfectant.

It is also used in white washing.

It is used in the preparation of many calcium salts.

It is used to prepare Bordeaux mixtures.

Question: 8

What is partial neutralisation?

In a reaction between an acid and a base, if some of the replaceable hydrogen ions in the acid or some of the replaceable hydroxyl ions in the base are left unreplaced, the reaction is called partial neutralisation. In this reaction acidic or basic salts are formed.

Question: 9

What are indicators?

Indicators are chemical compounds which show the acidic or basic nature of a solution by a characteristic colour change.

Question: 10

How is an acidic salt prepared?

Acidic salts are prepared by the partial neutralisation of an acid by a base. The salt contains at least one replaceable hydrogen atom.