Question

2hgo→2hg + o₂
the reaction above is classified as
a double displacement
b synthesis
c combustion reaction
d single displacement
e decomposition

Explanation:

• Double displacement: Involves exchange of ions between two compounds. Not applicable here as only one compound (\(HgO\)) is reacting.
• Synthesis: Combines two or more reactants to form one product. Opposite of what's happening here.
• Combustion reaction: Usually involves reaction with \(O_2\) to produce \(CO_2\) and \(H_2O\) (for organic compounds) or other oxides. Not the case here.
• Single displacement: One element replaces another in a compound. Not relevant as we have decomposition.
• Decomposition: A single compound breaks down into two or more simpler substances. \(2HgO

ightarrow2Hg + O_2\) fits this as \(HgO\) breaks into \(Hg\) and \(O_2\).

Answer:

e. decomposition