MDCAT Chemistry MCQs by Chapter: Atomic Structure, Bonding & Organic Chemistry
Chapter-wise MDCAT Chemistry practice — Atomic Structure, Chemical Bonding, Chemical Equilibrium and Organic Chemistry, four of the syllabus's highest-weight areas, with sample MCQs for each.
Chemistry is the second-highest-weight MDCAT subject after Biology, and four chapters carry a disproportionate share of the marks: Atomic Structure, Chemical Bonding, Chemical Equilibrium, and Organic Chemistry. Here's a chapter-by-chapter sample so you can see exactly where each concept sits.
Chapter: Atomic Structure
1. An atom with atomic number 11 has how many electrons in its neutral state?
- A) 10
- B) 11 ✅
- C) 12
- D) 23
2. Which subatomic particle carries no electric charge?
- A) Proton
- B) Electron
- C) Neutron ✅
- D) Positron
3. The quantum number that describes the shape of an atomic orbital is the:
- A) Principal quantum number
- B) Azimuthal (angular momentum) quantum number ✅
- C) Magnetic quantum number
- D) Spin quantum number
Chapter: Chemical Bonding
4. A bond formed by the sharing of electron pairs between atoms is a:
- A) Ionic bond
- B) Covalent bond ✅
- C) Metallic bond
- D) Hydrogen bond
5. A bond formed by the transfer of electrons, typically between a metal and a non-metal, is a(n):
- A) Covalent bond
- B) Ionic bond ✅
- C) Coordinate bond
- D) Van der Waals bond
6. According to VSEPR theory, the molecular shape of methane (CH₄) is:
- A) Trigonal planar
- B) Linear
- C) Tetrahedral ✅
- D) Octahedral
Chapter: Chemical Equilibrium
7. Le Chatelier's Principle states that when a system at equilibrium is disturbed, it:
- A) Stops reacting entirely
- B) Shifts to counteract the disturbance ✅
- C) Reverses direction permanently
- D) Has no observable response
8. Increasing the pressure on a gaseous equilibrium shifts it toward the side with:
- A) More moles of gas
- B) Fewer moles of gas ✅
- C) No change, pressure has no effect
- D) Equal moles on both sides only
9. Adding a catalyst to a reaction at equilibrium:
- A) Shifts the equilibrium position toward products
- B) Shifts the equilibrium position toward reactants
- C) Does not shift the equilibrium position, only speeds up reaching it ✅
- D) Increases the equilibrium constant
Chapter: Organic Chemistry
10. The general formula for alkanes is:
- A) CₙH₂ₙ
- B) CₙH₂ₙ₊₂ ✅
- C) CₙH₂ₙ₋₂
- D) CₙH₂ₙ₊₁
11. The functional group that defines an alcohol is:
- A) -COOH
- B) -CHO
- C) -OH ✅
- D) -NH₂
12. In ethene (C₂H₄), the carbon atoms forming the double bond are hybridized as:
- A) sp
- B) sp² ✅
- C) sp³
- D) sp³d
Why Chapter-by-Chapter Beats a Flat Question List
MDCAT Chemistry spans everything from atomic theory to full organic reaction mechanisms — a single undifferentiated "MDCAT Chemistry MCQs" post either stays too shallow across all of it or goes too deep into one area at random. Working chapter by chapter lets you find and drill your specific weak areas instead of re-reading material you've already mastered.
HighYield's MDCAT question bank is organized by subject and topic across all four MDCAT subjects, every question explained. For the concepts that repeat most often across all subjects, see our Most Repeated MDCAT MCQs by Subject. Try the first 20 questions of the full bank free, no sign-in required, from the MDCAT question bank page.