Question

concentrated sulphuric acid is added to blue vitriol , laboratory preparation of hydrogen,sulphur reacts with conc. sulphuric acid and laboratory preparation of muriatic acid -- list - non volatile acid dehydrating agent oxygen oxidizing agent reducing agent dilute acid drying agent​

Answer 1

Answer: (i) When a normal salt reacts with a non volatile acid, a volatile acid is obtained as a product. Hence, to obtain HCl which is a volatile acid the acid used must be non volatile. So, non volatile property of sulphuric acid is used here.

2NaCl+H

2

​

SO

4

​

⟶Na

2

​

SO

4

​

+2HCl(g)

(ii) CuSO

4

​

 is a salt of copper and CuO is a base. Hence it is a typical property of an acid that , acid reacts with base to form salt and water.

CuO+H

2

​

SO

4

​

⟶CuSO

4

​

+H

2

​

O

(iii) Oxidation reaction involves addition of oxygen. When a non metal reacts with an acid, it gets oxidized.

S+2H

2

​

SO

4

​

⟶3SO

2

​

+2H

2

​

O

Explanation: