The correct options are
A O3 is used as germicide for purification of air
C O3 molecule is angular in shape
D O3 is an oxidizing agent
Ozone or trioxygen, is an inorganic molecule with the chemical formula $OO_2 (also written O3).O3 is used as germicide for purification of air.In O3, O-O bond length is not identical with that of molecular oxygen.O3 molecule is angular in shape.O3 is an oxidizing agent.
Hence options A,C & D are correct.