MDCAT Chemical Bonding MCQs
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5
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495
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Up to 180
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Sample Chemical Bonding 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.
VSEPR Theory
1. BH3 has H-B-H bond angles of 120 with geometry as:
- A. Linear
- B. Trigonal planar
- C. Tetrahedron
- D. Bent
View answer and explanation
Answer: B. Trigonal planar
BH3 has three bonding pairs and no lone pairs on boron, giving trigonal planar geometry with 120-degree H-B-H angles. Linear, tetrahedral and bent geometries would need different electron-pair counts. Hence the geometry is trigonal planar.
VSEPR Theory
2. How many lone pairs of electrons are on the central xenon atom in Xe ?
- A. 0
- B. 1
- C. 2
- D. 3
View answer and explanation
Answer: D. 3
Keyword/Clue: XeF u2082 and central xenon atom Concept/Formula: Use valence electron counting and VSEPR electron domains. Xe has 8 valence electrons. Forming 2 Xe u2013F single (sigma) bonds uses 2 electrons from Xe (one per bond), leaving 6 electrons on Xe, i.e., 3 lone pairs. (Equivalently: 5 electron u2082E u2083.) Why the Other Options Are Wrong: - Option A: 0 lone pairs would imply AX u2082 (only 2 domains), not possible for XeF u2082. - Option B: 1 lone pair would give 3 domains (AX u2082E), inconsistent with Xe u electron count. - Option C: 2 lone pairs would give 4 domains (AX u2082E u2082), still inconsistent with the required 5 domains for XeF u2082.
Hybridization
3. The directional nature of covalent bonds is responsible for the phenomenon of:
- A. High electrical conductivity in solids
- B. Formation of crystal lattices
- C. High solubility in water for all compounds
- D. Isomerism in organic compounds
View answer and explanation
Answer: D. Isomerism in organic compounds
The fixed directional shapes of covalent bonds allow different spatial arrangements — the basis of isomerism in organic compounds. Hence Isomerism in organic compounds is correct. A ('High electrical conductivity in solids'), B ('Formation of crystal lattices') and C ('High solubility in water for all compounds') name properties not caused by directionality.
About this unit
MDCAT Chemical Bonding — Unit 26
1022 practice MCQs covering VSEPR Theory, Sigma & Pi Bonds, Hybridization, Dipole Moment, Bond Energy. Select custom topics and sit tailored tests up to 180 questions per drill.
Common questions about Chemical Bonding practice
How many Chemical Bonding MCQs are available on DIFF. MDCAT?
The current Chemical Bonding question bank contains 1,022 practice MCQs across 5 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 Chemical Bonding quiz cover?
The selectable topics are VSEPR Theory, Sigma & Pi Bonds, Hybridization, Dipole Moment, Bond 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 Chemical Bonding 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 Chemical Bonding 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 Chemical Bonding MCQs to improve?
Start with a short tutor drill on one of these topics: VSEPR Theory, Sigma & Pi Bonds, Hybridization. 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.