Oxidation of sulphur dioxide into sulphur trioxide in the absence of a catalyst is a slow process but this oxidation occurs easily in the atmosphere. Explain how does this happen. Give chemical reactions for the conversion of $S{O}_2$ into $S{O}_3$

Q. Oxidation of sulphur dioxide into sulphur trioxide in the absence of a catalyst is a slow process but this oxidation occurs easily in the atmosphere. Which substance here catalyse the reaction?

Q.

Which catalyst is used in the contact process to convert sulphur dioxide into sulphur trioxide?

Q. Sulphuric acid is manufactured by the Contact process.
(a) Give two balanced equations to obtain $S{O}_2$ in this process.
(b) Give the conditions for the oxidation of $S{O}_2$.
(c) Why is $H_{2}S{O}_4$ not obtained by directly reacting $S{O}_3$ with water?
(d) Name the chemical used to dissolve $S{O}_3$ and name also the product formed.
(e) Give all the main reactions to this process.
[5 MARKS]

Q. What is the catalyst used for oxidation of $S{O}_2$ to $S{O}_3$ in lead chamber process for manufacture of sulphuric acid?

Q.

Sulphur trioxide gas is an important precursor to manufacture sulphuric acid. It is produced by the catalytic oxidation of $S{O}_2$ gas. Which of the following are suitable catalysts for the process?