GENERAL CHEMISTRY EXAMINATION QUESTIONS AND
CORRECT ANSWER WITH EXPLANATION GRADED A+
STUDY GUIDE SOUTHERN NEW HAMPSHIRE UNIVERSITY
1. Chemistry is the study of:
A. Matter and its changes
B. Living organisms
C. Weather patterns
D. Earth structures
Answer: A
Rationale: Chemistry deals with matter, composition, and reactions.
2. Matter is anything that has:
A. Mass and volume
B. Only mass
C. Only energy
D. Only temperature
Answer: A
Rationale: Matter occupies space and has mass.
3. The basic unit of matter is the:
A. Atom
B. Cell
C. Molecule only
D. Electron only
Answer: A
Rationale: Atoms form all matter.
4. An element is made of:
A. One type of atom
B. Many compounds
C. Mixtures only
D. Different molecules
Answer: A
Rationale: Pure substance of identical atoms.
5. A compound is formed by:
A. Two or more elements chemically combined
, B. Physical mixing only
C. One atom only
D. Neutrons only
Answer: A
Rationale: Chemical bonding of elements.
6. A mixture is:
A. Physical combination of substances
B. Chemical bond
C. Single element
D. Pure substance only
Answer: A
Rationale: Components retain properties.
7. Homogeneous mixture is:
A. Uniform throughout
B. Non-uniform
C. Always solid
D. Always gas
Answer: A
Rationale: Same composition everywhere.
8. Heterogeneous mixture is:
A. Non-uniform composition
B. Pure substance
C. Gas only
D. Solution only
Answer: A
Rationale: Visible different parts.
9. The states of matter include:
A. Solid, liquid, gas
B. Solid only
C. Liquid only
D. Plasma only
Answer: A
Rationale: Basic physical states.
10. Plasma is:
A. Ionized gas
, B. Solid form
C. Liquid metal
D. Compound
Answer: A
Rationale: High-energy gas state.
11. Atomic number represents:
A. Number of protons
B. Neutrons only
C. Electrons only
D. Mass only
Answer: A
Rationale: Defines element identity.
12. Mass number is:
A. Protons + neutrons
B. Electrons only
C. Protons only
D. Neutrons only
Answer: A
Rationale: Total nuclear particles.
13. Isotopes are atoms with different:
A. Neutrons
B. Protons
C. Electrons only
D. Compounds
Answer: A
Rationale: Same element, different mass.
14. Electrons are found in:
A. Orbitals
B. Nucleus
C. Proton cloud
D. Neutron shell
Answer: A
Rationale: Electron cloud region.
15. The nucleus contains:
A. Protons and neutrons
CORRECT ANSWER WITH EXPLANATION GRADED A+
STUDY GUIDE SOUTHERN NEW HAMPSHIRE UNIVERSITY
1. Chemistry is the study of:
A. Matter and its changes
B. Living organisms
C. Weather patterns
D. Earth structures
Answer: A
Rationale: Chemistry deals with matter, composition, and reactions.
2. Matter is anything that has:
A. Mass and volume
B. Only mass
C. Only energy
D. Only temperature
Answer: A
Rationale: Matter occupies space and has mass.
3. The basic unit of matter is the:
A. Atom
B. Cell
C. Molecule only
D. Electron only
Answer: A
Rationale: Atoms form all matter.
4. An element is made of:
A. One type of atom
B. Many compounds
C. Mixtures only
D. Different molecules
Answer: A
Rationale: Pure substance of identical atoms.
5. A compound is formed by:
A. Two or more elements chemically combined
, B. Physical mixing only
C. One atom only
D. Neutrons only
Answer: A
Rationale: Chemical bonding of elements.
6. A mixture is:
A. Physical combination of substances
B. Chemical bond
C. Single element
D. Pure substance only
Answer: A
Rationale: Components retain properties.
7. Homogeneous mixture is:
A. Uniform throughout
B. Non-uniform
C. Always solid
D. Always gas
Answer: A
Rationale: Same composition everywhere.
8. Heterogeneous mixture is:
A. Non-uniform composition
B. Pure substance
C. Gas only
D. Solution only
Answer: A
Rationale: Visible different parts.
9. The states of matter include:
A. Solid, liquid, gas
B. Solid only
C. Liquid only
D. Plasma only
Answer: A
Rationale: Basic physical states.
10. Plasma is:
A. Ionized gas
, B. Solid form
C. Liquid metal
D. Compound
Answer: A
Rationale: High-energy gas state.
11. Atomic number represents:
A. Number of protons
B. Neutrons only
C. Electrons only
D. Mass only
Answer: A
Rationale: Defines element identity.
12. Mass number is:
A. Protons + neutrons
B. Electrons only
C. Protons only
D. Neutrons only
Answer: A
Rationale: Total nuclear particles.
13. Isotopes are atoms with different:
A. Neutrons
B. Protons
C. Electrons only
D. Compounds
Answer: A
Rationale: Same element, different mass.
14. Electrons are found in:
A. Orbitals
B. Nucleus
C. Proton cloud
D. Neutron shell
Answer: A
Rationale: Electron cloud region.
15. The nucleus contains:
A. Protons and neutrons
