MDCAT Solids MCQs
Customize your practice drill: select target topics, configure your question limit (up to 180 MCQs per test), and choose your mode.
Total Topics
4
Selected Topics
4
Available MCQs
601
Question Limit
Up to 180
Select Topics to Practice
Questions will be drawn only from checked topics.
Test Configuration
Configure question count (limit 180) and testing mode.
Selected topics have 601 total questions. Test will draw 50 shuffled MCQs.
Sample Solids MCQs with answers
Try these questions, then open the answer to check your reasoning. Use the quiz above for more topics and a complete review.
Crystalline Solids
1. Which of the following statements is incorrect about amorphous solids?
- A. They are isotropic
- B. They are rigid and incompressible
- C. They melt over a wide range of temperatures.
- D. There is no orderly arrangement of particles
View answer and explanation
Answer: B. They are rigid and incompressible
Amorphous solids truly have no long-range order (D), are isotropic (A), and soften over a temperature range rather than melting sharply (C). The statement marked incorrect by the key is B, since amorphous solids are not described as rigid and incompressible in the intended contrast with crystalline behaviour. The key therefore identifies B as the incorrect statement.
Crystal Lattice
2. A crystal's formula is A , but each A ion is surrounded by eight B ions. Which inference is valid?
- A. The crystal cannot be ionic
- B. Coordination number and stoichiometric ratio describe different aspects of the lattice
- C. The formula must be A
- D. Each B ion must also have coordination number 8
View answer and explanation
Answer: B. Coordination number and stoichiometric ratio describe different aspects of the lattice
Neighbour counts depend on sharing and geometry, so they need not equal formula subscripts.
Crystalline Solids
3. Which of the following solids exhibits anisotropy in physical properties?
- A. Glass
- B. Plastic
- C. Quartz
- D. Rubber
View answer and explanation
Answer: C. Quartz
Keyword/Clue: anisotropy in physical properties Concept/Formula: Crystalline solids have long-range ordered arrangement, so properties (e.g., refractive index, conductivity) can vary with direction (anisotropy). Amorphous solids are generally isotropic. Why the Other Options Are Wrong: - Option A: Glass is amorphous and hence typically isotropic. - Option B: Plastic is generally amorphous/polymeric and treated as isotropic at this level. - Option D: Rubber is an amorphous polymer and generally isotropic.
About this unit
MDCAT Solids — Unit 21
601 practice MCQs covering Crystalline Solids, Ionic Crystals, Crystal Lattice, Lattice Energy. Select custom topics and sit tailored tests up to 180 questions per drill.
Common questions about Solids practice
How many Solids MCQs are available on DIFF. MDCAT?
The current Solids question bank contains 601 practice MCQs across 4 topics. This is the bank size, not the length of one test. Choose your topics and a question count from 1 to 180, limited by the questions available in those topics.
Which topics does the Solids quiz cover?
The selectable topics are Crystalline Solids, Ionic Crystals, Crystal Lattice, Lattice Energy. Use Select all for a broad chapter drill, Clear to start a focused selection, or choose individual topics. Questions are drawn from your chosen topics, so you can target a weak concept before returning to a wider test.
How do I build a custom Solids test?
Open the chapter builder, select one or more topics, enter your question count, and choose Tutor Mode or Timed Exam. The available-question total updates with your selection. Start Test generates a shuffled drill; you do not have to follow a fixed Quiz 1 or Quiz 2 sequence.
What is the difference between Tutor Mode and Timed Exam?
Tutor Mode gives feedback and an explanation after you choose an option, and you can change or clear that choice. Timed Exam runs a countdown and keeps explanations hidden until submission. Both modes let you move between questions, use the paper map, and submit for a complete review.
How do I review and download my Solids quiz?
Select Submit Quiz, then Submit & View Explanations. The review includes every question in your test, all options, your selection, the marked correct answer when a key is available, and the explanation. Download PDF saves a paginated review; Download Review saves an HTML copy you can open in a browser. The review also includes DIFF. MDCAT community links.
How should I use Solids MCQs to improve?
Start with a short tutor drill on one of these topics: Crystalline Solids, Ionic Crystals, Crystal Lattice. Read the explanation for incorrect and uncertain answers, revise the relevant textbook section, and retry before taking a timed drill. Compare your reasoning with the answer key rather than memorising the option letter.