# Hg sticks to surface of glass when it reacts with

$(a)\;H_2O\qquad(b)\;HNO_3\qquad(c)\;O_3\qquad(d)\;I_2$

Hg is Oxidized by $O_3$ to $Hg_2O$ which dissolves in Hg and this solution loses meniscus and starts sticking to the surface of the glass
This process is called tailing of mercury.
(c) is the correct option.
answered Nov 27, 2013
edited Nov 24