1. Which of the following is NOT a state of matter?
a) Solid
b) Gas
c) Liquid
d) Energy
Answer: d) Energy
2. The atomic number of an element is determined by the number of:
a) Protons
b) Neutrons
c) Electrons
d) Nucleons
Answer: a) Protons
3. Which of the following is an example of a chemical change?
a) Boiling water
b) Melting ice
c) Burning paper
d) Cutting a piece of wood
Answer: c) Burning paper
4. What is the formula for sodium chloride?
a) NaCl
b) Na2Cl
c) NaCl2
d) Na2Cl2
Answer: a) NaCl
5. What is the chemical symbol for gold?
a) Ag
b) Au
c) Pt
d) Hg
Answer: b) Au
6. The process of a gas changing into a liquid is called:
a) Sublimation
b) Evaporation
c) Condensation
d) Fusion
Answer: c) Condensation
7. Which of the following elements is a noble gas?
a) Oxygen
b) Hydrogen
c) Helium
d) Carbon
Answer: c) Helium
8. What is the pH value of a neutral solution?
a) 0
b) 7
c) 14
d) -1
Answer: b) 7
9. Which gas is responsible for the greenhouse effect?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Hydrogen
Answer: c) Carbon dioxide
10. What is the chemical formula for water?
a) H2O
b) CO2
c) NaCl
d) C6H12O6
Answer: a) H2O
11. The process of rusting is an example of:
a) Oxidation
b) Reduction
c) Neutralization
d) Sublimation
Answer: a) Oxidation
12. What is the chemical formula for methane?
a) CH4
b) CO2
c) NH3
d) H2SO4
Answer: a) CH4
13. Which of the following is a noble gas?
a) Neon
b) Sodium
c) Calcium
d) Aluminum
Answer: a) Neon
14. The study of carbon compounds is called:
a) Organic chemistry
b) Inorganic chemistry
c) Physical chemistry
d) Analytical chemistry
Answer: a) Organic chemistry
15. Which of the following is a halogen element?
a) Fluorine
b) Iron
c) Zinc
d) Copper
Answer: a) Fluorine
16. What is the chemical
formula for sulfuric acid?
a) HCl
b) H2SO4
c) NaOH
d) HNO3
Answer: b) H2SO4
17. Which of the following is a greenhouse gas?
a) Oxygen
b) Nitrogen
c) Carbon dioxide
d) Helium
Answer: c) Carbon dioxide
18. What is the chemical symbol for potassium?
a) K
b) P
c) Pt
d) Kr
Answer: a) K
19. The process of converting a solid directly into a gas is called:
a) Sublimation
b) Evaporation
c) Condensation
d) Fusion
Answer: a) Sublimation
20. Which of the following is a strong acid?
a) Acetic acid
b) Hydrochloric acid
c) Citric acid
d) Carbonic acid
Answer: b) Hydrochloric acid
