How is sulphuric acid manufacture by contact process ?

How is sulphuric acid prepared by contact process? Write its reaction with H_2 S and KBr .

Sulphuric acid is manufactured by Contact process : Give all the main reactions of this process.

Sulphuric acid is manufactured by the contact process. Which step is not involved in the process?

Sulphuric acid is manufactured by Contact process : Give the conditions for the oxidation of SO_2 .

Sulphuric acid is manufactured by Contact process : Give two balanced equations to obtain SO_2 by this process

Sulphuric acid is manufactured by Contact process : Why H_2SO_4 is not obtained by directly reacting SO_3 with water ?

Sulphuric acid is manufactured by Contact process : Name the chemical used to dissolve SO_3 and also name the product formed.