2026 UPDATED QUESTIONS DOWNLOAD
CHM113 FINAL EXAM 2026 QUESTIONS
AND ANSWERS 100% PASS
This comprehensive study guide features 100 high-yield multiple-choice
questions covering every major unit of the General Chemistry I (CHM 113) curriculum.
Each question includes a detailed rationale in italics to explain the underlying chemical
principles and help you avoid common pitfalls. It is the perfect resource for final exam
preparation, focusing on stoichiometry, bonding, thermochemistry, and laboratory
safety.
Question 1
Which subatomic particle has a positive charge?
A. Electron
B. Proton
C. Neutron
D. Photon
Answer: B
Rationale: Protons carry a positive charge, electrons are negative, and neutrons are neutral.
Question 2
The atomic number of an element represents:
A. Number of neutrons
B. Number of protons
C. Atomic mass
D. Number of electrons only
Answer: B
Rationale: The atomic number equals the number of protons in the nucleus.
,2026 UPDATED QUESTIONS DOWNLOAD
Question 3
Which element is a noble gas?
A. Oxygen
B. Neon
C. Nitrogen
D. Sodium
Answer: B
Rationale: Neon is a noble gas with a full valence shell, making it inert.
Question 4
Which type of bond involves sharing electrons?
A. Ionic
B. Covalent
C. Metallic
D. Hydrogen
Answer: B
Rationale: Covalent bonds involve sharing electrons between atoms.
Question 5
Which compound is ionic?
A. CO₂
B. NaCl
C. CH₄
D. H₂O
Answer: B
Rationale: Sodium chloride forms ions (Na⁺ and Cl⁻), creating an ionic bond.
Question 6
,2026 UPDATED QUESTIONS DOWNLOAD
Which is the correct formula for water?
A. HO
B. H₂O
C. OH₂
D. H₃O
Answer: B
Rationale: Water consists of two hydrogen atoms bonded to one oxygen atom.
Question 7
What is the molar mass of CO₂?
A. 44 g/mol
B. 12 g/mol
C. 16 g/mol
D. 28 g/mol
Answer: A
Rationale: Carbon = 12 g/mol, Oxygen = 16 g/mol × 2 → 12 + 32 = 44 g/mol.
Question 8
Which particle determines the chemical properties of an element?
A. Neutron
B. Proton
C. Electron
D. Nucleus
Answer: C
Rationale: Electrons, especially valence electrons, determine chemical reactivity.
Question 9
Which of the following is a chemical change?
, 2026 UPDATED QUESTIONS DOWNLOAD
A. Melting ice
B. Dissolving sugar
C. Burning paper
D. Crushing a rock
Answer: C
Rationale: Burning paper produces new substances, indicating a chemical change.
Question 10
What is the empirical formula of hydrogen peroxide (H₂O₂)?
A. H₂O
B. HO
C. H₂O₂
D. H₂
Answer: B
Rationale: The simplest whole-number ratio is HO.
Question 11
Which element is a halogen?
A. Fluorine
B. Neon
C. Sodium
D. Magnesium
Answer: A
Rationale: Halogens are Group 17 elements like fluorine, chlorine, bromine, iodine.
Question 12
What is the mass of 2 moles of H₂O?
CHM113 FINAL EXAM 2026 QUESTIONS
AND ANSWERS 100% PASS
This comprehensive study guide features 100 high-yield multiple-choice
questions covering every major unit of the General Chemistry I (CHM 113) curriculum.
Each question includes a detailed rationale in italics to explain the underlying chemical
principles and help you avoid common pitfalls. It is the perfect resource for final exam
preparation, focusing on stoichiometry, bonding, thermochemistry, and laboratory
safety.
Question 1
Which subatomic particle has a positive charge?
A. Electron
B. Proton
C. Neutron
D. Photon
Answer: B
Rationale: Protons carry a positive charge, electrons are negative, and neutrons are neutral.
Question 2
The atomic number of an element represents:
A. Number of neutrons
B. Number of protons
C. Atomic mass
D. Number of electrons only
Answer: B
Rationale: The atomic number equals the number of protons in the nucleus.
,2026 UPDATED QUESTIONS DOWNLOAD
Question 3
Which element is a noble gas?
A. Oxygen
B. Neon
C. Nitrogen
D. Sodium
Answer: B
Rationale: Neon is a noble gas with a full valence shell, making it inert.
Question 4
Which type of bond involves sharing electrons?
A. Ionic
B. Covalent
C. Metallic
D. Hydrogen
Answer: B
Rationale: Covalent bonds involve sharing electrons between atoms.
Question 5
Which compound is ionic?
A. CO₂
B. NaCl
C. CH₄
D. H₂O
Answer: B
Rationale: Sodium chloride forms ions (Na⁺ and Cl⁻), creating an ionic bond.
Question 6
,2026 UPDATED QUESTIONS DOWNLOAD
Which is the correct formula for water?
A. HO
B. H₂O
C. OH₂
D. H₃O
Answer: B
Rationale: Water consists of two hydrogen atoms bonded to one oxygen atom.
Question 7
What is the molar mass of CO₂?
A. 44 g/mol
B. 12 g/mol
C. 16 g/mol
D. 28 g/mol
Answer: A
Rationale: Carbon = 12 g/mol, Oxygen = 16 g/mol × 2 → 12 + 32 = 44 g/mol.
Question 8
Which particle determines the chemical properties of an element?
A. Neutron
B. Proton
C. Electron
D. Nucleus
Answer: C
Rationale: Electrons, especially valence electrons, determine chemical reactivity.
Question 9
Which of the following is a chemical change?
, 2026 UPDATED QUESTIONS DOWNLOAD
A. Melting ice
B. Dissolving sugar
C. Burning paper
D. Crushing a rock
Answer: C
Rationale: Burning paper produces new substances, indicating a chemical change.
Question 10
What is the empirical formula of hydrogen peroxide (H₂O₂)?
A. H₂O
B. HO
C. H₂O₂
D. H₂
Answer: B
Rationale: The simplest whole-number ratio is HO.
Question 11
Which element is a halogen?
A. Fluorine
B. Neon
C. Sodium
D. Magnesium
Answer: A
Rationale: Halogens are Group 17 elements like fluorine, chlorine, bromine, iodine.
Question 12
What is the mass of 2 moles of H₂O?
