Incorrect statement among the following is

Water produces dioxygen and ozone when reacts with most electronegative element in the
periodic table

During the removal of temporary hardness by Clark’s process, addition of excess of slaked lime
cause to develop permanent hardness

In the softening of hard water, Mg forms complex with EDTA in which the coordination number
of Mg is 6

In the softening of hard water by Gan’s permutite process, the principle absorption takes place