Catalyst used in the oxidation of `SO_(2) rarr SO_(3)`

In the contact process for the manufacture of H_2SO_4 some amount of sulphuric acid is used as a starting material. Explain briefly, which is the catalyst used for the oxidation of SO_2 to SO_3 ?

Give the mechanism of the following reactions: (a) In lead chamber process, NO(g) is used as catalyst in the oxidation of SO_(2) to SO_(3) . (b) NO(g) catalyses the decomposition ozone to oxygen. (c) Ozone layer depletion by freon or teflon.

Name the catalyst used for the oxidation of SO_2 to SO_3 in contact process.

What is the catalyst used for oxidation of SO_(2) to SO_(3) in lead chamber process for manufacture of sulphuric acid ?

What is the catalyst used for oxidation of SO_(2) to SO_(3) in lead chamber process for manufacture of sulphuric acid ?

What is the catalyst used for oxidation of SO_2 to SO_3 in lead chamber process for manufacture of sulphuric acid ?