Which of my two elements is the biggest pollution threat when dissolve in water?Chlorine or Oxygen?

Question

Which of the two element is the biggest threat?

Answer 1

The obvious answer is chlorine. Chlorine is what bleach is made of so quite corrosive. Since water is made up of 2 parts hydrogen, 1 part oxygen, I can't imagine adding more oxygen would cause pollution. But maybe I'm missing something.

Answer 2

Oxygen, of course, is of critical importance to living organisms. It is important to remember that oxygen is a potent poison, and that too much can be a bad thing. We're probably lucky that the atmosphere has only 21% O2; astronomers on other planets have probably concluded that life cannot exist on Earth because of the high levels of noxious oxygen. Any more O2 and it would probably start to poison the process of photosynthesis (actually, it already does to a point, the reaction is called photorespiration). In water, however, it is easy for O2 concentrations to become depleted in local areas, such as in sediments or the bottom of stagnant bodies of water. These local areas of oxygen depletion serve as important refugia for the many ecologically significant anaerobic organisms, and thus should not be viewed automatically as "bad". Nitrogen fixation, for instance, is notoriously sensitive to O2; root nodules of legumes and heterocysts of Cyanobacteria are structures built to exclude O2 so that nitrogen fixation can take place.

Answer 3

Neither is a threat. Oxygen (or air with it) is often bubbled into water to kill germs in it and help fish to breathe despite pollution. Chlorine is a very popular germicide used to make polluted water drinkable.

Answer 4

Water is made up of oxygen so it can't be a threat.

Answer 5

Oxygen

because in the troposphere, oxygen atoms react with H2O to produce a free radical

O:(g) + H2O (g) --> 2 .OH(g)

the OH has a free radical and it can react with substances like ntrogen dioxide to produce nitric acid and so on and so on

Answer 6

probably oxygen