MDCAT Chemistry MCQs Chapter Wise Practice
Master all 15 chapters of MDCAT Chemistry with our comprehensive question bank. Practice with detailed explanations and track your progress.
Why Chemistry Matters
Chemistry in MDCAT: 30% of Your Total Score
Chemistry is the second most important subject in the MDCAT exam, accounting for 60 out of 200 marks, which equals 30% of your total score. A strong command of Chemistry can significantly boost your aggregate and help you secure a seat in Pakistan's top medical and dental colleges. The PMC MDCAT Chemistry syllabus encompasses the complete FSc Pre-Medical Chemistry curriculum, spanning both first and second year topics from Atomic Structure and Chemical Bonding to complex Organic Chemistry reactions and Industrial Chemistry processes.
The Chemistry section in MDCAT is known for testing both conceptual understanding and numerical problem-solving ability. You will encounter questions on reaction mechanisms, balancing equations, calculating pH values, predicting products of organic reactions, and applying thermodynamic principles. Organic Chemistry alone can contribute 15-20 MCQs, making it the single most important topic within Chemistry. Our collection of 12,000+ Chemistry MCQs covers every chapter and subtopic prescribed in the PMC MDCAT 2026 syllabus. Each question is crafted to simulate the actual exam pattern, with varying difficulty levels from basic recall to advanced application. Whether you need to master named reactions in Organic Chemistry, practice numerical problems in Physical Chemistry, or revise periodic trends, our chapter-wise question bank provides the comprehensive practice you need. Combined with detailed explanations for every answer, PrepMDCAT helps you understand the reasoning behind each solution, building the deep understanding that translates to high scores on exam day.
Chapter Breakdown
15 Chapters, 12,000+ MCQs
Complete chapter-wise Chemistry MCQ coverage aligned with the PMC MDCAT 2026 syllabus.
Atomic Structure
Atomic models, quantum numbers, electronic configuration
Chemical Bonding
Ionic, covalent, metallic bonds, intermolecular forces
States of Matter
Gases, liquids, solids, phase transitions
Solutions
Concentration units, colligative properties, solubility
Electrochemistry
Electrochemical cells, electrolysis, Nernst equation
Reaction Kinetics
Rate laws, order of reaction, catalysis
Chemical Equilibrium
Le Chatelier's principle, equilibrium constant, Kp and Kc
Acids, Bases & Salts
pH, buffers, titrations, acid-base theories
Organic Chemistry
Functional groups, reactions, mechanisms, nomenclature
Hydrocarbons
Alkanes, alkenes, alkynes, aromatic compounds
Biochemistry
Amino acids, proteins, carbohydrates, lipids, nucleic acids
Industrial Chemistry
Manufacturing processes, Haber process, contact process
Environmental Chemistry
Pollution, ozone depletion, greenhouse effect, water treatment
Thermochemistry
Enthalpy, Hess's law, calorimetry, bond energy
Nuclear Chemistry
Radioactivity, half-life, nuclear reactions, fission, fusion
Sample Questions
Test Your Chemistry Knowledge
Try these 10 sample MCQs from our Chemistry question bank. Click on an option to check your answer.
0 of 10 answered
The electronic configuration of Cr (Z=24) is:
The shape of a p-orbital is:
According to VSEPR theory, the shape of SF₆ is:
The de Broglie wavelength equation is:
Which series of hydrogen spectrum falls in visible region?
pH of pure water at 25°C is:
Ethanol has the molecular formula:
The process of conversion of solid directly to gas is:
Which element has the highest electronegativity?
The functional group of carboxylic acid is:
Solved MCQs with Explanations
MDCAT Chemistry MCQs with Detailed Answers
Understanding the "why" behind each answer is crucial for MDCAT success. Here are sample MCQs with comprehensive explanations to help you build deep conceptual understanding.
Q1. The electronic configuration of Cr (Z=24) is:
- A) [Ar] 3d⁴ 4s²
- B) [Ar] 3d⁵ 4s¹
- C) [Ar] 3d³ 4s² 4p¹
- D) [Ar] 3d⁶
Correct Answer: B) [Ar] 3d⁵ 4s¹
Chromium is an exception to the expected electron configuration due to the extra stability of a half-filled d subshell (d⁵). Instead of [Ar] 3d⁴ 4s², chromium adopts [Ar] 3d⁵ 4s¹ because a half-filled d-orbital configuration provides additional exchange energy stabilization. Similarly, copper (Cu) is [Ar] 3d¹⁰ 4s¹ instead of [Ar] 3d⁹ 4s².
Q2. According to VSEPR theory, the shape of SF₆ is:
- A) Tetrahedral
- B) Trigonal bipyramidal
- C) Octahedral
- D) Square planar
Correct Answer: C) Octahedral
SF₆ has 6 bonding pairs and no lone pairs around the central sulfur atom, giving it an octahedral geometry with 90° bond angles. The sulfur atom undergoes sp³d² hybridization. VSEPR theory predicts shapes based on minimizing repulsion between electron pairs: 2 pairs = linear, 3 = trigonal planar, 4 = tetrahedral, 5 = trigonal bipyramidal, 6 = octahedral.
Q3. Which series of hydrogen spectrum falls in visible region?
- A) Lyman
- B) Balmer
- C) Paschen
- D) Brackett
Correct Answer: B) Balmer
The Balmer series (transitions to n=2) is the only hydrogen emission series that falls in the visible region of the electromagnetic spectrum. The Lyman series (n=1) falls in the ultraviolet region, while Paschen (n=3), Brackett (n=4), and Pfund (n=5) series all fall in the infrared region.
Q4. The de Broglie wavelength equation is:
- A) λ = mv/h
- B) λ = h/mv
- C) λ = hv/m
- D) λ = m/hv
Correct Answer: B) λ = h/mv
The de Broglie equation λ = h/mv (or λ = h/p, where p is momentum) demonstrates wave-particle duality — all matter has both wave and particle properties. The wavelength is inversely proportional to momentum, which is why wave properties are only significant for very small particles like electrons, not macroscopic objects.
Q5. The functional group of carboxylic acid is:
- A) -OH
- B) -CHO
- C) -COOH
- D) -NH₂
Correct Answer: C) -COOH
Carboxylic acids contain the -COOH (carboxyl) functional group. -OH is for alcohols, -CHO is for aldehydes, and -NH₂ is for amines. The carboxyl group is a combination of carbonyl (C=O) and hydroxyl (-OH) groups. Carboxylic acids are weak acids that can donate a proton (H+) from the -OH of the carboxyl group.
Want detailed explanations for all 12,000+ Chemistry MCQs? Download the PrepMDCAT app for complete access.
Complete Topic Coverage
MDCAT Chemistry Topics & Subtopics
Our Chemistry MCQ bank covers every topic and subtopic in the PMC MDCAT 2026 syllabus. All these topics are also covered in our comprehensive study notes available in the PrepMDCAT app.
Atomic Structure
Chemical Bonding
Organic Chemistry
Physical Chemistry
Thermochemistry
Nuclear & Environmental
All notes for these topics are available in the PrepMDCAT app. Download now to access chapter-wise study notes, flashcards, and 12,000+ practice MCQs with detailed explanations.
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FAQs
Frequently Asked Questions
How many Chemistry MCQs are in the MDCAT exam?
The MDCAT exam contains 60 Chemistry MCQs out of 200 total questions, making Chemistry the second highest-weighted subject at 30% of the total marks. Strong Chemistry preparation is essential for a competitive MDCAT score.
Which Chemistry topics are most important for MDCAT?
Organic Chemistry carries the highest weightage, followed by Chemical Bonding, Acids Bases & Salts, and Thermochemistry. Physical Chemistry numericals (equilibrium, electrochemistry) are also frequently tested. Focus on reaction mechanisms and named reactions.
How should I prepare Chemistry for MDCAT 2026?
Start with a strong conceptual foundation from your FSc textbook. Practice Organic Chemistry reactions daily, memorize periodic table trends, and solve numerical problems regularly. Use PrepMDCAT for chapter-wise MCQ practice and track your progress with analytics.
Is Organic Chemistry difficult for MDCAT?
Organic Chemistry can be challenging but is very scoring if prepared systematically. Focus on learning functional groups, reaction mechanisms, and named reactions. Practice drawing structures and predicting products. Regular MCQ practice on PrepMDCAT makes it manageable.
How many Chemistry MCQs should I practice daily?
Aim to practice 40-80 Chemistry MCQs daily during active preparation. Start with chapter-wise questions to build concepts, then move to mixed tests. Focus extra time on Organic Chemistry as it has the highest number of questions in the actual exam.
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