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Chemistry NMDCAT MCQs

Ace your medical entry test with Pakistan's premium collection of Chemistry MCQs. Strictly aligned with the latest PMDC syllabus, our platform offers high-yield practice questions for Physical, Inorganic, and Organic Chemistry—complete with detailed conceptual explanations to maximize your score.

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Subcategories

📁 Absolute Zero 0 📁 Acidity of Alkynes 0 📁 Adhesive 0 📁 ALCOHOLS AND PHENOLS 0 📁 Alcohols and Phenols (Differentiation) 0 📁 ALDEHYDES & KETONES 0 📁 ALKYL HALIDES 0 📁 Anomalous behavior of Water 0 📁 Application of Dipole Movement 0 📁 Application of VSEPR Theory 0 📁 ATONTIC STRUCTURE 0 📁 Balancing Chemical Reaction 0 📁 Boiling point and Vapor Pressure 0 📁 Bond Energy 0 📁 Boyle's Law 0 📁 Buffer Solution 0 📁 CARBOXYLIC ACIDS 0 📁 Charles's Law 0 📁 CHEMICAL BONDING 0 📁 Chemical Equilibrium 0 📁 Chemical Kinetics 0 📁 Chemical Reactions of Benzenes 0 📁 Chemical Reactions/Reactivity 0 📁 Chemistry MCQS By Iqbal Hussain 0 📁 CHETVI ICAL EQUI LIBIRIUM 0 📁 Classification of Proteins 0 📁 Common Ion Effect 0 📁 Conversion of Carboxylic Acid 0 📁 Crystal lattice 0 📁 Crystalline Solids 0 📁 D- & F Block Elements 0 📁 Definition and Classification of Organic Compound 0 📁 Different Terms Used 0 📁 Dipole Movement 0 📁 Discovery of Proton 0 📁 Dyes 0 📁 Effect of Substituents 0 📁 ELECTROCHEVIISTRY 0 📁 Electronic Configuration 0 📁 Electronic Structure 0 📁 Enthalpy 0 📁 Enzymes as Biocatalyst 0 📁 Evaporation 0 📁 Exothermic and Endothermic Reaction 0 📁 Factors affecting rate of reaction 0 📁 Factors Affecting the Shape of Ionic Crystals 0 📁 Free Radical Mechanism 0 📁 Functional Group 0 📁 FUNDAMENTAL CONCEPTS OF CHEMISTRY 0 📁 FUNDAMENTAL PRICIPLES OF ORGANIC CHEMISTRY 0 📁 Haber’s Process 0 📁 Hess’s Law 0 📁 Hybridization 0 📁 Hydrogen Bonding 0 📁 Ideal Gas Equation 0 📁 Importance of Proteins 0 📁 INDUSTRIAL CHEMISTRY 0 📁 Internal Energies 0 📁 Ionic and Molecular Crystals 0 📁 Isomerism 0 📁 IUPAC System of Alkynes 0 📁 Kinetic Molecular Theory 0 📁 Lattice Energy 0 📁 Law of Thermodynamics 0 📁 Le Chatelier's principle 0 📁 Limiting and Excess Reactants 74 📁 LIQUIDS 0 📁 Macro Molecules 0 📁 Moles and Avogadro's Numbers 150 📁 Moles and Avogadro’s Numbers 120 📁 MOT of Benzene Resonance and Resonance Energy 0 📁 Nomenclature 0 📁 Nomenclature and structure of Aldehydes and Ketones 0 📁 Nomenclature of Alkanes 0 📁 Nomenclature of Alkenes 0 📁 Nomenclature Structure and Reactivity 0 📁 Order of Reaction 0 📁 Oxidation and Reduction 0 📁 P- 0 📁 Planck's Quantum Theory 0 📁 Polymers 0 📁 Preparation 0 📁 Preparation of Alkanes 0 📁 Preparation of Alkynes 0 📁 Properties Of Liquids based on Kinetic Molecular Theory 0 📁 Quantum Number 0 📁 Rate Constant 0 📁 Reaction of Aldehydes and Ketones 0 📁 Reaction of Group I elements 0 📁 Reaction of Group II elements 0 📁 Reaction of Group IV elements 0 📁 Reactions of Alkynes 0 📁 Reactivity of Aldehydes and Ketones 0 📁 Reactivity of Benzene 0 📁 Real and Ideal Gas 0 📁 Redox Reaction 0 📁 S AND P BLOCK ELEMNETS 0 📁 S- 0 📁 s- and p- Block Elements Properties and their Trends 0 📁 Shapes of Alkenes 0 📁 Shapes of orbitals 0 📁 Sigma and Pi Bond 0 📁 SOLIDS 0 📁 Solubility Products 0 📁 Spectrum of Hydrogen 0 📁 Standard Hydrogen Electrode (SHE) 0 📁 Standard Temperature and Pressure (STP) 0 📁 Structure and Preparation of Carboxylic Acid 0 📁 structure and reactivity of Alcohol 0 📁 Structure and Reactivity of Alkenes 0 📁 structure and reactivity of Phenols 0 📁 Substitution vs Addition 0 📁 Substitution vs Elimination 0 📁 THERMOCHEMISTRY & ENERGETICS OF CHEMICAL REACTIONS 0 📁 Thermodynamics 0 📁 Unit of "R" 0 📁 Unit of “R” 0 📁 VSEPR Theory 0 📁 Yield 80

Practice Questions

33. The concept that even a large excess of one reactant cannot produce more product than dictated by the other reactant is a consequence of the

A. Law of Conservation of Mass
B. Principle of the limiting reactant
C. Kinetic theory of gases
D. Law of Multiple Proportions

The limiting reactant determines the maximum yield regardless of excess reactant.

nmdcat.online Chemistry NMDCAT MCQs
Jul 2, 2026

In the reaction N₂ + 3H₂ → 2NH₃, a mixture of 2 moles of N₂ and 3 moles of H₂ is allowed to react. The limiting reactant in this mixture is

A. Nitrogen
B. Hydrogen
C. Ammonia
D. Both reactants are present in stoichiometric amounts

According to the balanced equation, 2 moles of N₂ require 6 moles of H₂. Since only 3 moles of H₂ are available, hydrogen is the limiting reactant.

nmdcat.online Chemistry NMDCAT MCQs
Jul 2, 2026

The concept of a limiting reactant is crucial in industrial processes primarily because it

A. Determines the color of the product
B. Allows impure reactants
C. Determines the maximum yield and minimizes waste
D. Increases reaction rate

Industries optimize limiting reactants to maximize efficiency.

nmdcat.online Chemistry NMDCAT MCQs
Jul 2, 2026

The concept of a limiting reactant is best described as the reactant that

A. Is present in the smallest mass
B. Has the lowest molar mass
C. Is completely consumed first and determines the amount of product formed
D. Is the most expensive and must be conserved

The limiting reactant is completely used up first and determines the maximum amount of product formed.

nmdcat.online Chemistry NMDCAT MCQs
Jul 2, 2026

A is limiting. Product formed = (2/3) × 3 = 2 mol.

nmdcat.online Chemistry NMDCAT MCQs
Jul 2, 2026

4 g H₂ = 2 mol and 32 g O₂ = 1 mol. The ratio is exactly 2:1, so both reactants are completely consumed.

nmdcat.online Chemistry NMDCAT MCQs
Jul 2, 2026

The ratio 10:15 simplifies to 2:3, matching the balanced equation. Neither reactant is in excess.

nmdcat.online Chemistry NMDCAT MCQs
Jul 2, 2026

8 mol O₂ require only 6.4 mol NH₃. Therefore, NH₃ remains in excess by 1.6 mol.

nmdcat.online Chemistry NMDCAT MCQs
Jul 2, 2026

In the complete combustion of 3 moles of carbon with 2 moles of oxygen (C + O₂ → CO₂), the limiting reactant and the maximum moles of CO₂ formed are

A. C is limiting; 2 moles CO₂
B. O₂ is limiting; 2 moles CO₂
C. C is limiting; 3 moles CO₂
D. O₂ is limiting; 3 moles CO₂

The reaction is 1:1. Two moles of O₂ produce only 2 moles of CO₂.

nmdcat.online Chemistry NMDCAT MCQs
Jul 2, 2026

In the reaction 2Al + 3Cl₂ → 2AlCl₃, 54 g of Al is mixed with 71 g of Cl₂. The limiting reactant is

A. Aluminium
B. Chlorine
C. Both are stoichiometric
D. Aluminium chloride

Al = 2 mol, Cl₂ = 1 mol. Two moles Al require 3 mol Cl₂, so chlorine is limiting.

nmdcat.online Chemistry NMDCAT MCQs
Jul 2, 2026

H₂ is limiting. NH₃ formed = (2/3) × 4 = 2.67 mol.

nmdcat.online Chemistry NMDCAT MCQs
Jul 2, 2026

One mole of Fe₂O₃ reacts with 3 mol CO to produce 2 mol Fe = 112 g.

nmdcat.online Chemistry NMDCAT MCQs
Jul 2, 2026

During the reaction of 10 g of CaCO₃ with 10 g of HCl, the limiting reactant is

A. Calcium carbonate
B. Hydrochloric acid
C. Both are limiting
D. Carbon dioxide

CaCO₃ = 0.1 mol, HCl = 0.274 mol. Since only 0.2 mol HCl is required, CaCO₃ is limiting.

nmdcat.online Chemistry NMDCAT MCQs
Jul 2, 2026

The substance that is completely used up in a chemical reaction and limits the extent of the reaction is defined as the

A. Excess reagent
B. Catalyst
C. Limiting reagent
D. Product inhibitor

It is the reactant consumed first, stopping the reaction.

nmdcat.online Chemistry NMDCAT MCQs
Jul 2, 2026

The reactants are present in the exact stoichiometric ratio.

nmdcat.online Chemistry NMDCAT MCQs
Jul 2, 2026

O₂ limits the reaction. Only 2 mol P₄ react, leaving 2 mol P₄.

nmdcat.online Chemistry NMDCAT MCQs
Jul 2, 2026

The yield of a product in a reaction is ultimately controlled by the

A. Amount of excess reactant added
B. Total mass of all reactants taken
C. Amount of the limiting reactant present initially
D. Catalyst used

The limiting reactant determines the theoretical yield.

nmdcat.online Chemistry NMDCAT MCQs
Jul 2, 2026

Mg is limiting. Two moles Mg produce 2 mol MgO = 80 g.

nmdcat.online Chemistry NMDCAT MCQs
Jul 2, 2026

Stoichiometric mixture produces 3 mol S = 96 g.

nmdcat.online Chemistry NMDCAT MCQs
Jul 2, 2026
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