Question

What type of chemical reaction is illustrated by `H_2SO_4(aq) ->SO_3(g) + H_2O(l)`?

Answer 1

decomposition

Explanation:

In this equation one compound is changed into two compounds
This is an example of a decomposition reaction.

None of the elements change their oxidation numbers.

Hydrogen `H^(+1)` remains +1 in Water. ( the products)
Sulfur `S^(+6)` remains + 6 in Sulfur trioxide.
Oxygen `O^(-2)` remains -2 in Oxygen.

Therefore it is not an oxidation reduction reaction.