Question

What happens in ozonolysis?

Answer 1

Ozone is used to break the multiple bonds in organic molecules.

Explanation:

Alkenes can be oxidized with ozone to form alcohols, aldehydes, ketones, or carboxylic acids. It is not only used in organic synthesis, but it is a very useful method for analyzing the structure of organic compounds.

A reasonably accurate detailed description is here:
https://en.wikipedia.org/wiki/Ozonolysis