MDCAT Chemistry — Chemical Bonding
Chemical Bonding is a core Chemistry topic in the PMDC MDCAT syllabus, covering 11 subtopics. Below are the subtopics to revise, how often the topic appears in past papers, and real past-paper MCQs to try.
Subtopics (11)
- Bond Energy
- Dipole Moment
- Hybridization
- Ionic Character of Covalent Bond
- Isomerism (Stereoisomerism)
- Molecular Shapes (VSEPR Application)
- Nucleophilic Addition Reactions
- Nucleophilic Substitution Mechanisms
- Shapes of Orbitals
- Sigma and Pi Bonds
- VSEPR Theory
How Chemical Bonding is tested
Across the 16 MDCAT past papers on ParhaiKrlo, Chemical Bonding accounts for 82 questions. It appears in all 16, about 5.1 questions a paper. The heaviest was MDCAT 2017, with 9 questions, and the most recent is MDCAT 2025, with 5.
| Paper | Questions |
|---|---|
| MDCAT 2025 | 5 |
| MDCAT 2024 | 4 |
| MDCAT 2023 | 5 |
| MDCAT 2022 | 7 |
| MDCAT 2019 | 3 |
| MDCAT 2018 | 8 |
| MDCAT 2017 | 9 |
| MDCAT 2016 | 8 |
| MDCAT 2015 | 7 |
| MDCAT 2014 | 5 |
| MDCAT 2013 | 3 |
| MDCAT 2012 | 2 |
| MDCAT 2011 | 1 |
| MDCAT 2010 | 5 |
| MDCAT 2009 | 5 |
| MDCAT 2008 | 5 |
Chemical Bonding MCQs from the MDCAT past papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · MDCAT 2025 · Chemical Bonding
In propene, the pi-bond is formed by sideway overlap of:
- A.s-orbitals
- B.p-orbitals
- C.sp³ hybrid orbitals
- D.sp² hybrid orbitals
Show answer
Answer: B. p-orbitals — The pi-bond in propene forms by sideways overlap of unhybridized p-orbitals.
- Q2 · MDCAT 2024 · Chemical Bonding
Which of the following has a coordinate bond?
- A.NaCl
- B.CaO
- C.NH₃BF₃
- D.H₂O
Show answer
Answer: C. NH₃BF₃ — NH3BF3 contains a coordinate (dative) bond, formed by ammonia's lone pair donating into boron's empty orbital.
- Q3 · MDCAT 2023 · Chemical Bonding
Alkylbenzene is formed when benzene is treated with an alkyl halide in the presence of anhydrous aluminum chloride. Identify the type of reaction.
- A.Halogenation
- B.Friedel-Crafts acylation reaction
- C.Friedel-Crafts alkylation reaction
- D.Sulphonation
Show answer
Answer: C. Friedel-Crafts alkylation reaction — Benzene reacting with an alkyl halide over anhydrous AlCl3 is a Friedel-Crafts alkylation reaction.