AP Chemistrymediummcq1 pt
Which substance is the reducing agent in 2Al + Fe₂O₃ → Al₂O₃ + 2Fe?
A.Al
B.Fe₂O₃
C.Fe
D.Al₂O₃
Explanation
Core Concept
Aluminum loses electrons (0 → +3) and thereby reduces iron — the reducing agent is whatever gets oxidized.
Correct Answer
AAl
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 →