Statement (I) : When O3 is passed through mercury , mercury loses  its meniscus and sticks to the walls of the glass containerStatement (II) : Hg2O formed dissolves in Hg

When O3 is passed through mercury taken in a Capillary,Mercury loses its meniscus and sticksto the walls  of the Capillary due to the formation of soluble mercury(I)oxide.This is called Tailing of mercury.On washing with water meniscus can be retained