What happens when propene is subjected to ozonolysis? What are some examples?

Propene on treatment with 1) O3, CH2Cl2 (2) Zn/H2O gives acetaldehyde and formaldehyde.

Other examples :

Ethylene on ozonolysis gives 2 moles of formaldehyde.

2-butene on ozonolysis gives 2 moles of acetaldehyde.

1-butene on ozonolysis gives 1mole of propionaldehyde and 1 mole of formaldehyde.