1. Solid → Liquid is called:
A) Freezing
B) Melting (Answer: B)
C) Condensation
D) Sublimation
2. Liquid → Gas is called:
A) Condensation
B) Freezing
C) Evaporation (Answer: C)
D) Deposition
3. Gas → Liquid is called:
A) Melting
B) Condensation (Answer: B)
C) Sublimation
D) Evaporation
4. Solid → Gas is called:
A) Evaporation
B) Freezing
C) Sublimation (Answer: C)
D) Deposition
5. Which state of matter has the least energy?
A) Gas
B) Plasma
C) Liquid
D) Solid (Answer: D)
6. Which state of matter has a definite volume but no definite shape?
A) Solid
B) Liquid (Answer: B)
C) Gas
D) Plasma
7. Which state of matter has the most energy?
A) Solid
B) Liquid
C) Gas
D) Plasma (Answer: D)
8. A bond between a metal and a nonmetal is:
A) Covalent
B) Ionic (Answer: B)
C) Metallic
D) Hydrogen
9. A bond between two nonmetals is:
A) Ionic
B) Covalent (Answer: B)
C) Metallic
D) Nuclear
10. Mg₃N₂ is:
A) Covalent
B) Ionic (Answer: B)
C) Neither
D) Both
11. Which compound is covalent?
A) NaCl
B) MgO
C) CO₂ (Answer: C)
D) CaBr₂
12. Ionic bonds form when electrons are:
A) Shared
B) Transferred (Answer: B)
C) Destroyed
D) Created
13. A + B → AB is which reaction type?
A) Decomposition
B) Single replacement
C) Synthesis (Answer: C)
D) Combustion
14. AB → A + B is which reaction type?
A) Synthesis
B) Decomposition (Answer: B)
C) Double replacement
D) Combustion
15. AB + CD → AD + CB is:
A) Single replacement
B) Decomposition
C) Combustion
D) Double replacement (Answer: D)
16. A hydrocarbon reacting with oxygen to form CO₂ and H₂O is:
A) Synthesis
B) Combustion (Answer: B)
C) Decomposition
D) Replacement
17. When balancing chemical equations, you may change:
A) Subscripts
B) Element symbols
C) Coefficients (Answer: C)
D) Charges
18
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