What type of reaction is HgO -----> Hg + O2
The type or reaction for HgO is 2HgO = 2Hg + O2. Hgo reacts in a red form when it is heated and in a yellow form by precipitation of aqueous Hg2+ with alkali. Check out for more on http://en.wikipedia.org/wiki/Mercury%28II%29_oxide.
It Is decomposition