1.

SO_(3) can be prepared by which of the following reactions ?

Answer»

`CaSO_(4) C OVERSET ("HEAT") to `
`Fe_(2)(SO_(4))_(3) overset("heat") to`
`S+H_(2)SO_(4) overset("heat") to`
`H_(2)SO_(4) + PCl_(5) overset("heat") to`

Solution :`Fe_(2)(SO_(4))_(3) overset("heat") to Fe_(2)O_(3)+3SO_(3)`


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