GENERAL CHEMISTRY EXAMINATION QUESTIONS AND CORRECT ANSWER WITH EXPLANATION GRADED A+ STUDY GUIDE

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