Question

what happens when mercuric oxide is heated? give a chemical equation.

Answer 1

when mercuric oxide is heated to a certain temperature, it will get separated to mercury and oxygen due to thermal decomposition.
2HgO---2Hg+O2

Answer 2

Mercury(II) oxide, a red solid, decomposes when heated to produce mercury and oxygen gas. A reaction is also considered to be a decomposition reaction even when one or more of the products are still compounds.

2(Hg2O) (s) + heat ---> 4Hg (l) + O2 (g)