Sulphur trioxide can be obtained by which of the following reactions :

Options

A. `S+H_(2)SO_(4) overset(Delta)to`
B. `H_(2)SO_(4)+PCl overset(Delta)to`
C. `CaSO_(2)+C overset(Delta)to`
D. `Fe_(2)+(SO_(4))_(3)overset(Delta)to`

Answer

D

Explanation

`Fe_(2)+(SO_(4))_(3)overset(Delta)to Fe_(2)O_(3)+3SO_(3)`