AP Chemistryeasymcq1 pt
Which is a combustion reaction?
A.C₃H₈ + 5O₂ → 3CO₂ + 4H₂O
B.2H₂O → 2H₂ + O₂
C.NaOH + HCl → NaCl + H₂O
D.Zn + CuSO₄ → ZnSO₄ + Cu
Explanation
Core Concept
Combustion reacts a fuel with oxygen, producing CO₂ and H₂O (for hydrocarbons) and releasing heat. This is the defining pattern.
Correct Answer
AC₃H₈ + 5O₂ → 3CO₂ + 4H₂O
More Unit 4: Chemical Reactions practice questions
- easyWhat is the oxidation number of carbon in CO₃²⁻?
- mediumHow many grams of HCl (36.5 g/mol) react completely with 4.0 g of NaOH (40.0 g/mol)?
- easyIn 4Fe + 3O₂ → 2Fe₂O₃, which element is reduced?
- easyWhich observation is evidence of a physical change only?
- medium2.0 mol of N₂ and 2.0 mol of H₂ react via N₂ + 3H₂ → 2NH₃. How many moles of H₂ remain after complete reaction?
Practice more AP Chemistry questions with full explanations
Practice Unit 4: Chemical Reactions Questions →