Medal for helping me(small explanation of how u got answer if possible too): Which of the following is an example of a decomposition reaction?

a. 2HgO yields 2Hg + O2
b. 2Hg + O2 yields 2HgO
c. Hg + HgCl2 yields Hg2Cl2
d. HgOH + HCl yields H2O + HgCl

Question

Medal for helping me(small explanation of how u got answer if possible too):    Which of the following is an example of a decomposition reaction?

a.   2HgO yields 2Hg + O2
b.   2Hg + O2 yields 2HgO
c.   Hg + HgCl2 yields Hg2Cl2
d.   HgOH + HCl yields H2O + HgCl

anonymous · Answer

do you know what a decomposition reaction is?

anonymous · Answer

its the separation of a chemical compound into elements or into simpler compounds.

micahm · Answer

H2CO3 (aq) --> H2O (l) + CO2 (g). 

a decomposition reaction is the separation of a chemical compound into elements or simpler compounds, and that's only the case in H2CO3 (aq) --> H2O (l) + CO2 (g).

micahm · Answer

https://answers.yahoo.com/question/index?qid=20150604105258AARwzXB#

anonymous · Answer

thank u for ur help^_^