Question

5
select the correct answer.
iron oxide reacts with aluminum to give aluminum oxide and iron. what kind of chemical reaction is this?
a. combustion
b. decomposition
c. replacement
d. synthesis

Explanation:

• Combustion: Combustion reactions involve a substance reacting with oxygen to produce heat and light (usually with \(CO_2\) and \(H_2O\) as products if the reactant is a hydrocarbon). This reaction does not fit that description.
• Decomposition: Decomposition reactions involve a single compound breaking down into two or more simpler substances (\(AB

ightarrow A + B\)). Here we have two reactants, so it's not decomposition.

• Replacement (Single - replacement): In a single - replacement reaction, one element replaces another element in a compound (\(A+BC

ightarrow AC + B\)). In the reaction \(Fe_2O_3+Al
ightarrow Al_2O_3 + Fe\), aluminum (\(Al\)) replaces iron (\(Fe\)) in iron oxide (\(Fe_2O_3\)).

• Synthesis: Synthesis reactions involve two or more substances combining to form a single compound (\(A + B

ightarrow AB\)). This is not the case here as we have two products.

Answer:

C. replacement