Question

s + o₂ → so₂
the reaction above is classified as _.
a combustion reaction
b double displacement
c decomposition
d single displacement
e synthesis

Explanation:

• Combustion Reaction: A combustion reaction is a reaction in which a substance reacts with oxygen, usually with the release of heat and light. Sulfur reacting with oxygen (\(S + O_{2}

ightarrow SO_{2}\)) is a combustion reaction as it involves the reaction of sulfur with oxygen.

• Double displacement: In a double - displacement reaction, the positive and negative ions of two ionic compounds exchange places. This reaction (\(S + O_{2}

ightarrow SO_{2}\)) does not involve the exchange of ions between two compounds.

• Decomposition: A decomposition reaction is a reaction in which a single compound breaks down into two or more simpler substances. Here, we have two reactants (\(S\) and \(O_{2}\)) combining, not a single compound breaking down.
• Single displacement: In a single - displacement reaction, one element replaces another element in a compound. There is no compound with an element being replaced in the given reaction (\(S + O_{2}

ightarrow SO_{2}\)).

• Synthesis: A synthesis reaction is a reaction in which two or more substances combine to form a single new substance. While \(S + O_{2}

ightarrow SO_{2}\) is also a synthesis reaction, the more specific classification based on the nature of reactants (reaction with oxygen) is combustion.

Answer:

A. Combustion Reaction