SO3 is not directly dissolved in water in the industrial preparation of H2SO4 by the contact process because?

A. SO3 is an acidic gas
B. Acid is usually added to water and not water to acid
C. The reaction between SO3 and water is violently exothermic
D. SO3 does not dissolve readily in water

Correct Answer: Option C

C. The reaction between SO3 and water is violently exothermic