TEST BANK GENERAL ORGANIC AND BIOLOGICAL
CHEMISTRY 5TH EDITION SMITH (CHAPTER 1-25)
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q&A 2026 |INSTANT DOWNLOAD PDF
1. What is the primary focus of general chemistry?
A. Study of carbon compounds only
B. Study of matter, its properties, and changes
C. Study of living organisms only
D. Study of nuclear reactions only
Rationale: General chemistry deals with matter, its
composition, properties, and transformations.
Correct Answer: B
2. Which subatomic particle has a positive charge?
A. Electron
B. Neutron
C. Proton
D. Positron only
Rationale: Protons carry a positive charge within the atomic
nucleus.
Correct Answer: C
3. The atomic number of an element represents the number
of:
,A. Neutrons
B. Protons
C. Protons + neutrons
D. Electrons + neutrons
Rationale: Atomic number defines the number of protons in the
nucleus.
Correct Answer: B
4. Which of the following is a pure substance?
A. Air
B. Milk
C. Distilled water
D. Soil
Rationale: Pure substances have a fixed composition; distilled
water is H₂O only.
Correct Answer: C
5. An element in the periodic table is defined by its:
A. Mass number
B. Atomic number
C. Isotopes
D. Valence electrons only
Rationale: Elements are identified by number of protons
(atomic number).
Correct Answer: B
,6. Which bond involves sharing of electrons?
A. Ionic bond
B. Metallic bond
C. Covalent bond
D. Hydrogen bond
Rationale: Covalent bonds form when atoms share electron
pairs.
Correct Answer: C
7. The pH scale measures:
A. Temperature
B. Salinity
C. Acidity or basicity
D. Density
Rationale: pH indicates hydrogen ion concentration in a
solution.
Correct Answer: C
8. Water is considered a polar molecule because it:
A. Has no charge
B. Has equal electron sharing
C. Has partial positive and negative ends
D. Is non-reactive
, Rationale: Oxygen is more electronegative, creating polarity.
Correct Answer: C
9. Which is a characteristic of acids?
A. Bitter taste
B. Turn red litmus blue
C. Release H⁺ ions in solution
D. Always slippery
Rationale: Acids increase hydrogen ion concentration.
Correct Answer: C
10. The smallest unit of matter that retains properties of an
element is:
A. Molecule
B. Atom
C. Compound
D. Ion
Rationale: Atoms are the basic units of elements.
Correct Answer: B
11. A chemical reaction in which bonds are broken and new
ones formed is called:
A. Physical change
B. Nuclear change
C. Chemical change
CHEMISTRY 5TH EDITION SMITH (CHAPTER 1-25)
QUESTIONS AND CORRECT ANSWERS (VERIFIED
ANSWERS) Q&A 2026 |INSTANT DOWNLOAD PDF
1. What is the primary focus of general chemistry?
A. Study of carbon compounds only
B. Study of matter, its properties, and changes
C. Study of living organisms only
D. Study of nuclear reactions only
Rationale: General chemistry deals with matter, its
composition, properties, and transformations.
Correct Answer: B
2. Which subatomic particle has a positive charge?
A. Electron
B. Neutron
C. Proton
D. Positron only
Rationale: Protons carry a positive charge within the atomic
nucleus.
Correct Answer: C
3. The atomic number of an element represents the number
of:
,A. Neutrons
B. Protons
C. Protons + neutrons
D. Electrons + neutrons
Rationale: Atomic number defines the number of protons in the
nucleus.
Correct Answer: B
4. Which of the following is a pure substance?
A. Air
B. Milk
C. Distilled water
D. Soil
Rationale: Pure substances have a fixed composition; distilled
water is H₂O only.
Correct Answer: C
5. An element in the periodic table is defined by its:
A. Mass number
B. Atomic number
C. Isotopes
D. Valence electrons only
Rationale: Elements are identified by number of protons
(atomic number).
Correct Answer: B
,6. Which bond involves sharing of electrons?
A. Ionic bond
B. Metallic bond
C. Covalent bond
D. Hydrogen bond
Rationale: Covalent bonds form when atoms share electron
pairs.
Correct Answer: C
7. The pH scale measures:
A. Temperature
B. Salinity
C. Acidity or basicity
D. Density
Rationale: pH indicates hydrogen ion concentration in a
solution.
Correct Answer: C
8. Water is considered a polar molecule because it:
A. Has no charge
B. Has equal electron sharing
C. Has partial positive and negative ends
D. Is non-reactive
, Rationale: Oxygen is more electronegative, creating polarity.
Correct Answer: C
9. Which is a characteristic of acids?
A. Bitter taste
B. Turn red litmus blue
C. Release H⁺ ions in solution
D. Always slippery
Rationale: Acids increase hydrogen ion concentration.
Correct Answer: C
10. The smallest unit of matter that retains properties of an
element is:
A. Molecule
B. Atom
C. Compound
D. Ion
Rationale: Atoms are the basic units of elements.
Correct Answer: B
11. A chemical reaction in which bonds are broken and new
ones formed is called:
A. Physical change
B. Nuclear change
C. Chemical change
