GENERAL CHEMISTRY I (CHEM 1) PRACTICE
TEST WITH CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A |
INSTANT DOWNLOAD PDF
1. What is the SI unit of amount of substance?
A. Gram
B. Mole
C. Liter
D. Newton
Correct CORRECT ANSWER: B — Mole
RATIONALE:
The mole is the SI unit used to measure the amount of substance in chemistry.
2. Which particle has a negative charge?
A. Proton
B. Neutron
C. Electron
D. Nucleus
Correct CORRECT ANSWER: C — Electron
RATIONALE:
Electrons carry a negative electrical charge and are found outside the nucleus.
3. What is the atomic number of an element?
A. Number of neutrons
B. Number of protons
C. Number of electrons + neutrons
D. Mass of the atom
Correct CORRECT ANSWER: B — Number of protons
,RATIONALE:
The atomic number defines the identity of an element.
4. Which law states that mass is neither created nor destroyed in a chemical
reaction?
A. Law of Multiple Proportions
B. Law of Conservation of Mass
C. Boyle’s Law
D. Charles’s Law
Correct CORRECT ANSWER: B — Law of Conservation of Mass
RATIONALE:
Mass remains constant in a closed system during chemical reactions.
5. What is the formula for water?
A. H₂O
B. CO₂
C. NaCl
D. H₂O₂
Correct CORRECT ANSWER: A — H₂O
RATIONALE:
Water consists of two hydrogen atoms and one oxygen atom.
6. Which type of bond involves sharing of electrons?
A. Ionic bond
B. Metallic bond
C. Covalent bond
D. Hydrogen bond
Correct CORRECT ANSWER: C — Covalent bond
RATIONALE:
Covalent bonds form when atoms share electrons.
, 7. What is the pH of a neutral solution?
A. 0
B. 7
C. 14
D. 1
Correct CORRECT ANSWER: B — 7
RATIONALE:
A pH of 7 indicates neutrality (equal hydrogen and hydroxide ions).
8. Which gas law relates pressure and volume at constant temperature?
A. Charles’s Law
B. Boyle’s Law
C. Avogadro’s Law
D. Dalton’s Law
Correct CORRECT ANSWER: B — Boyle’s Law
RATIONALE:
Boyle’s Law shows inverse relationship between pressure and volume.
9. What is the charge of a proton?
A. Negative
B. Positive
C. Neutral
D. Variable
Correct CORRECT ANSWER: B — Positive
RATIONALE:
Protons carry a positive electrical charge.
10. Which subatomic particle has no charge?
TEST WITH CORRECT ANSWERS (VERIFIED
ANSWERS) PLUS RATIONALES 2026 Q&A |
INSTANT DOWNLOAD PDF
1. What is the SI unit of amount of substance?
A. Gram
B. Mole
C. Liter
D. Newton
Correct CORRECT ANSWER: B — Mole
RATIONALE:
The mole is the SI unit used to measure the amount of substance in chemistry.
2. Which particle has a negative charge?
A. Proton
B. Neutron
C. Electron
D. Nucleus
Correct CORRECT ANSWER: C — Electron
RATIONALE:
Electrons carry a negative electrical charge and are found outside the nucleus.
3. What is the atomic number of an element?
A. Number of neutrons
B. Number of protons
C. Number of electrons + neutrons
D. Mass of the atom
Correct CORRECT ANSWER: B — Number of protons
,RATIONALE:
The atomic number defines the identity of an element.
4. Which law states that mass is neither created nor destroyed in a chemical
reaction?
A. Law of Multiple Proportions
B. Law of Conservation of Mass
C. Boyle’s Law
D. Charles’s Law
Correct CORRECT ANSWER: B — Law of Conservation of Mass
RATIONALE:
Mass remains constant in a closed system during chemical reactions.
5. What is the formula for water?
A. H₂O
B. CO₂
C. NaCl
D. H₂O₂
Correct CORRECT ANSWER: A — H₂O
RATIONALE:
Water consists of two hydrogen atoms and one oxygen atom.
6. Which type of bond involves sharing of electrons?
A. Ionic bond
B. Metallic bond
C. Covalent bond
D. Hydrogen bond
Correct CORRECT ANSWER: C — Covalent bond
RATIONALE:
Covalent bonds form when atoms share electrons.
, 7. What is the pH of a neutral solution?
A. 0
B. 7
C. 14
D. 1
Correct CORRECT ANSWER: B — 7
RATIONALE:
A pH of 7 indicates neutrality (equal hydrogen and hydroxide ions).
8. Which gas law relates pressure and volume at constant temperature?
A. Charles’s Law
B. Boyle’s Law
C. Avogadro’s Law
D. Dalton’s Law
Correct CORRECT ANSWER: B — Boyle’s Law
RATIONALE:
Boyle’s Law shows inverse relationship between pressure and volume.
9. What is the charge of a proton?
A. Negative
B. Positive
C. Neutral
D. Variable
Correct CORRECT ANSWER: B — Positive
RATIONALE:
Protons carry a positive electrical charge.
10. Which subatomic particle has no charge?
