SCH3U GRADE 11 CHEMISTRY UNIT 1 TEST
|COMPLETE QUESTIONS AND ANSWERS |
ONTARIO VIRTUAL SCHOOL | 2026.
70 Questions with Answers and Detailed Rationales
100 PERCENT GUARANTEED PASS
INSTANT DOWNLOAD ANSWERS INCLUDED
IMPORTANCE OF THIS DOCUMENT
This comprehensive examination preparation guide has been meticulously developed to help you succeed in the
SCH3U GRADE 11 CHEMISTRY UNIT 1 TEST |COMPLETE QUESTIONS AND ANSWERS | ONTARIO
VIRTUAL SCHOOL | 2026.. It contains 70 carefully selected questions that reflect the most current exam content
and testing strategies. Each question is accompanied by a correct answer and a detailed rationale that explains
the underlying pathophysiology, pharmacology, or clinical reasoning.
Self-Assessment – Test your knowledge and Exam Preparation – Familiarize yourself with the
identify areas requiring further question format and content
study areas
Concept Reinforcement – Deepen your Confidence Building – Develop test-taking
understanding through strategies and reduce
evidence-based exam anxiety
rationales
Time Management – Practice answering
questions under simulated
exam conditions
Review Summary 70 Questions
Foundations - Application - Sch3u Grade 11 Chemistry UNIT 1 Complete AND Ontario Virtual School 2026
Chemistry Grade 11 Ontario / Advanced HIGH School
All answers with rationales
,Table of Contents
Content Area Questions Key Topics
Matter Chemical Trends AND 1-12 Energy, Highest, Covalent BOND, Elements, Ionization
Chemical Bonding
Chemical Reactions 13-24 Sample, Reaction, Pressure, Consider, Effect
Quantities IN Chemical 25-36 Reaction, Electron, Solution, Water, Boiling Point
Reactions
Solutions AND Solubility 37-48 Initial, Concentration, Point, Volume, Compound
Gases AND Atmospheric 49-60 Reaction, Molecule, Molecular, Energy, Oxidation Number
Chemistry
Atomic Structure AND 61-70 Reaction, Temperature, Buffer, Vessel Contains, Spark Converts
Periodic Table Trends
TOTAL 70 All questions include answers and detailed rationales
, Section A - Matter Chemical Trends AND Chemical
Bonding
Q1.
In a multi-electron atom, which of the following electron configurations violates the Pauli
exclusion principle?
A. 1s² 2s² 2p 3s¹ B. 1s² 2s² 2p 3s² 3p 4s¹ 3d
C. 1s² 2s² 2p 3s² 3p 3d 4s² D. 1s² 2s² 2p 3s¹
Correct: D - 1s² 2s² 2p 3s¹
Rationale:The Pauli exclusion principle states that no two electrons in an atom can have the
same set of four quantum numbers. In option D, the 2p subshell has 7 electrons, which would
require two electrons to have identical quantum numbers (since 2p can hold at most 6).
Options A, B, and C are valid configurations (though B and C may represent excited or
ground states, they do not violate Pauli).
Q2.
Which element has the highest electronegativity according to the Pauling scale?
A. Chlorine B. Oxygen
C. Fluorine D. Nitrogen
Correct: C - Fluorine
Rationale:Fluorine has the highest electronegativity (3.98 on the Pauling scale) because it
has a small atomic radius and a high effective nuclear charge, attracting bonding electrons
strongly. Oxygen (3.44) and chlorine (3.16) are lower, and nitrogen (3.04) is even lower.
Q3.
Which of the following compounds is expected to have the highest lattice energy?
A. NaCl B. MgO
C. KBr D. LiF
Correct: B - MgO
Rationale:Lattice energy increases with increasing ionic charge and decreasing ionic radius.
MgO has ions with charges +2 and -2, and relatively small ionic radii, leading to very strong
electrostatic attractions. NaCl, KBr, and LiF all have ±1 charges, so their lattice energies are
lower despite some having small ions.
Page 3
|COMPLETE QUESTIONS AND ANSWERS |
ONTARIO VIRTUAL SCHOOL | 2026.
70 Questions with Answers and Detailed Rationales
100 PERCENT GUARANTEED PASS
INSTANT DOWNLOAD ANSWERS INCLUDED
IMPORTANCE OF THIS DOCUMENT
This comprehensive examination preparation guide has been meticulously developed to help you succeed in the
SCH3U GRADE 11 CHEMISTRY UNIT 1 TEST |COMPLETE QUESTIONS AND ANSWERS | ONTARIO
VIRTUAL SCHOOL | 2026.. It contains 70 carefully selected questions that reflect the most current exam content
and testing strategies. Each question is accompanied by a correct answer and a detailed rationale that explains
the underlying pathophysiology, pharmacology, or clinical reasoning.
Self-Assessment – Test your knowledge and Exam Preparation – Familiarize yourself with the
identify areas requiring further question format and content
study areas
Concept Reinforcement – Deepen your Confidence Building – Develop test-taking
understanding through strategies and reduce
evidence-based exam anxiety
rationales
Time Management – Practice answering
questions under simulated
exam conditions
Review Summary 70 Questions
Foundations - Application - Sch3u Grade 11 Chemistry UNIT 1 Complete AND Ontario Virtual School 2026
Chemistry Grade 11 Ontario / Advanced HIGH School
All answers with rationales
,Table of Contents
Content Area Questions Key Topics
Matter Chemical Trends AND 1-12 Energy, Highest, Covalent BOND, Elements, Ionization
Chemical Bonding
Chemical Reactions 13-24 Sample, Reaction, Pressure, Consider, Effect
Quantities IN Chemical 25-36 Reaction, Electron, Solution, Water, Boiling Point
Reactions
Solutions AND Solubility 37-48 Initial, Concentration, Point, Volume, Compound
Gases AND Atmospheric 49-60 Reaction, Molecule, Molecular, Energy, Oxidation Number
Chemistry
Atomic Structure AND 61-70 Reaction, Temperature, Buffer, Vessel Contains, Spark Converts
Periodic Table Trends
TOTAL 70 All questions include answers and detailed rationales
, Section A - Matter Chemical Trends AND Chemical
Bonding
Q1.
In a multi-electron atom, which of the following electron configurations violates the Pauli
exclusion principle?
A. 1s² 2s² 2p 3s¹ B. 1s² 2s² 2p 3s² 3p 4s¹ 3d
C. 1s² 2s² 2p 3s² 3p 3d 4s² D. 1s² 2s² 2p 3s¹
Correct: D - 1s² 2s² 2p 3s¹
Rationale:The Pauli exclusion principle states that no two electrons in an atom can have the
same set of four quantum numbers. In option D, the 2p subshell has 7 electrons, which would
require two electrons to have identical quantum numbers (since 2p can hold at most 6).
Options A, B, and C are valid configurations (though B and C may represent excited or
ground states, they do not violate Pauli).
Q2.
Which element has the highest electronegativity according to the Pauling scale?
A. Chlorine B. Oxygen
C. Fluorine D. Nitrogen
Correct: C - Fluorine
Rationale:Fluorine has the highest electronegativity (3.98 on the Pauling scale) because it
has a small atomic radius and a high effective nuclear charge, attracting bonding electrons
strongly. Oxygen (3.44) and chlorine (3.16) are lower, and nitrogen (3.04) is even lower.
Q3.
Which of the following compounds is expected to have the highest lattice energy?
A. NaCl B. MgO
C. KBr D. LiF
Correct: B - MgO
Rationale:Lattice energy increases with increasing ionic charge and decreasing ionic radius.
MgO has ions with charges +2 and -2, and relatively small ionic radii, leading to very strong
electrostatic attractions. NaCl, KBr, and LiF all have ±1 charges, so their lattice energies are
lower despite some having small ions.
Page 3
