What is the catalyst used in the manufacture of sulphuric acid by contact process?

Options

A. Nickel powder
B. Platinised asbestos
C. Anhydrous `Al_(3)O_(3)`
D. Aluminium powder

Answer

B

Explanation

The reaction occuring in contact process are as follows,
`2SO_(2)+O_(2) underset(400-450^(@)C,1-5atm)overset("Platinised asbestos")hArr 2SO_(3)`.
`H_(2)SO_(4)+SO_(3) to H_(2)S_(2)O_(7)`
`H_(2)S_(2)O_(7)+H_(2)O tio 2H_(2)SO_(4)`
Therefore, plastinised asbestos is used as catalyst.