MDCAT Chemistry — Solids
Solids is a core Chemistry topic in the PMDC MDCAT syllabus, covering 6 subtopics. Below are the subtopics to revise, how often the topic appears in past papers, and real past-paper MCQs to try.
Subtopics (6)
- Crystal Lattice
- Crystalline Solids
- Factors Affecting Shape of Ionic Crystals
- Ionic vs Molecular Crystals
- Lattice Energy
- Metallic Bonding and Conduction
How Solids is tested
Across the 16 MDCAT past papers on ParhaiKrlo, Solids accounts for 27 questions. It appears in 13 of them, about 2.1 questions a paper. The heaviest was MDCAT 2024, with 4 questions, and the most recent is MDCAT 2025, with 3.
| Paper | Questions |
|---|---|
| MDCAT 2025 | 3 |
| MDCAT 2024 | 4 |
| MDCAT 2023 | 2 |
| MDCAT 2022 | 2 |
| MDCAT 2017 | 1 |
| MDCAT 2016 | 2 |
| MDCAT 2014 | 1 |
| MDCAT 2013 | 1 |
| MDCAT 2012 | 1 |
| MDCAT 2011 | 3 |
| MDCAT 2010 | 3 |
| MDCAT 2009 | 3 |
| MDCAT 2008 | 1 |
Solids MCQs from the MDCAT past papers
Try each one before opening the answer. Each comes with a short explanation.
- Q1 · MDCAT 2025 · Solids
Which one shows anisotropic behavior?
- A.Wood
- B.Gemstone
- C.Coke
- D.Graphite
Show answer
Answer: D. Graphite — Graphite shows anisotropic behavior (its properties differ depending on direction).
- Q2 · MDCAT 2024 · Solids
Whenever the crystalline solids are broken they do so along definite planes known as:
- A.Cleavage planes
- B.Refractory planes
- C.Sagittal planes
- D.Coronal planes
Show answer
Answer: A. Cleavage planes — Crystalline solids fracture along definite cleavage planes.
- Q3 · MDCAT 2023 · Solids
In anisotropic crystals which property do not change with the change in direction of crystalline structure?
- A.Electrical conductance
- B.Thermal conductance
- C.Molar mass
- D.Refractive index
Show answer
Answer: C. Molar mass — In anisotropic crystals, molar mass is the property that stays the same regardless of direction, unlike conductance or refractive index.