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

Matter

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. Why must equations be balanced?

A) To look neat

B) To add energy

C) Conservation of mass (Answer: C)

D) To change