University of North Carolina — CHEM 101
General Descriptive Chemistry I — Final
Exam
150+ Practice Questions with Answers &
Rationales
COURSE TOPICS COVERED
Topic Description
Classes of matter, physical/chemical
Matter &
properties, SI units, significant figure
Measurement
dimensional analysis
Subatomic particles, isotopes, atomi
Atomic Structure
number, mass number, atomic mass
Periods, groups, periodic trends,
Periodic Table
nomenclature
,Topic Description
Ionic and covalent bonds, Lewis
Chemical Bonding structures, VSEPR theory, molecular
geometry, polarity
Mole calculations,
Stoichiometry empirical/molecular formulas, limiti
reactants, percent yield
Balancing equations, types of
Chemical
reactions, net ionic equations, redox
Reactions
reactions
Gas laws, ideal gas equation, partial
Gases
pressures, kinetic molecular theory
Enthalpy, Hess's Law, calorimetry,
Thermochemistry
heat capacity
,Topic Description
Molarity, dilutions, colligative
Solutions
properties
pH, pOH, strong/weak acids and
Acids & Bases
bases, neutralization
Equilibrium constants, Le Châtelier's
Equilibrium
principle
PART I: MATTER, MEASUREMENT & SIGNIFICANT
FIGURES (Questions 1-25)
1. Which of the following is a pure substance?
• A) Saltwater
• B) Air
• C) Gold
, • D) Salad
• E) Granite
Answer: C
Rationale: A pure substance has a constant
composition and distinct chemical properties.
Gold is an element, which is a pure substance.
Saltwater and air are homogeneous mixtures;
salad and granite are heterogeneous mixtures.
2. Which of the following is a homogeneous
mixture?
• A) Sand and water
• B) Oil and water
• C) Saltwater
• D) Salad
• E) Granite
General Descriptive Chemistry I — Final
Exam
150+ Practice Questions with Answers &
Rationales
COURSE TOPICS COVERED
Topic Description
Classes of matter, physical/chemical
Matter &
properties, SI units, significant figure
Measurement
dimensional analysis
Subatomic particles, isotopes, atomi
Atomic Structure
number, mass number, atomic mass
Periods, groups, periodic trends,
Periodic Table
nomenclature
,Topic Description
Ionic and covalent bonds, Lewis
Chemical Bonding structures, VSEPR theory, molecular
geometry, polarity
Mole calculations,
Stoichiometry empirical/molecular formulas, limiti
reactants, percent yield
Balancing equations, types of
Chemical
reactions, net ionic equations, redox
Reactions
reactions
Gas laws, ideal gas equation, partial
Gases
pressures, kinetic molecular theory
Enthalpy, Hess's Law, calorimetry,
Thermochemistry
heat capacity
,Topic Description
Molarity, dilutions, colligative
Solutions
properties
pH, pOH, strong/weak acids and
Acids & Bases
bases, neutralization
Equilibrium constants, Le Châtelier's
Equilibrium
principle
PART I: MATTER, MEASUREMENT & SIGNIFICANT
FIGURES (Questions 1-25)
1. Which of the following is a pure substance?
• A) Saltwater
• B) Air
• C) Gold
, • D) Salad
• E) Granite
Answer: C
Rationale: A pure substance has a constant
composition and distinct chemical properties.
Gold is an element, which is a pure substance.
Saltwater and air are homogeneous mixtures;
salad and granite are heterogeneous mixtures.
2. Which of the following is a homogeneous
mixture?
• A) Sand and water
• B) Oil and water
• C) Saltwater
• D) Salad
• E) Granite
