Preparation of salts

Question 1

An oxide that does not react with acid or alkali

Answer 1

Carbon monoxide is an oxide of carbon that does not react with either acids or bases.

Question 2

The oxide that reacts with water to give a strong alkali solution

Answer 2

Sodium oxide

Question 3

oxide used as bleach

Answer 3

SO2 gas is used as a bleaching agent. Its bleaching action is temporary due to its reducing action. Here S oxidises to higher oxidation state and it reduces other compound.

Question 4

name an amphoteric oxide

Answer 4

Aluminium oxide is an amphoteric oxide.

Question 5

Oxide with giant covalent structure

Answer 5

Silicon oxide

Question 6

Oxide soluble in water and is acidic

Answer 6

Sulphur trioxide dissolves in water to from sulphuric acid; SO3+H2O→H2SO4.

Question 7

why do acids of the same concentration have different ph

Answer 7

This is because the pH of an acid solution depends not only on the concentration of H+ ions, but also on the strength of the acid.

Question 8

Explain the presence of sulfur and nitrogen dioxide in the air

Answer 8

sulfur dioxide converts acids in the atmosphere and comes down in rain, snow, fog. Nitrogen dioxide is a result of human activities such as combustion of fossil fuels.