Question

1) Why Sulphuric acid is called the ‘king of chemicals’?

(ii) Name the gas evolved when:

(a) Concentrated Sulphuric acid acts on Sulphur

(b) Dilute Sulphuric acid acts on Sodium carbonate

(iii) State the colour change you would observe on adding concentrated Sulphuric acid to:

(a) Blue Copper sulphate crystals

(b) Colourless cane-sugar crystals

Answer 1

1 .sulphuric acid was taken as a measure of the degree of industrialisation of a country, and earned it its nickname of the 'king of chemicals'.

2. ( b) CO2 gas is evolved

equation :-

Na2CO3 + H2SO4 ---> Na2SO4 + H2O + CO2

Answer 2

Answer:

Sulfuric acid, sulfuric also spelled sulphuric (H2SO4), also called oil of vitriol, or hydrogen sulfate, dense, colourless, oily, corrosive liquid; one of the most commercially important of all chemicals. Sulfuric acid is prepared industrially by the reaction of water with sulfur trioxide (see sulfur oxide), which in turn is made by chemical combination of sulfur dioxide and oxygen either by the contact process or the chamber process. In various concentrations the acid is used in the manufacture of fertilizers, pigments, dyes, drugs, explosives, detergents, and inorganic salts and acids, as well as in petroleum refining and metallurgical processes. In one of its most familiar applications, sulfuric acid serves as the electrolyte in lead–acid storage batteries.