chemistry final exam 50 questions
with correct answers and rationales
graded a+ for 2026 assured excel!!
General Chemistry Revision Guide with Rationales
1. Which type of reaction takes place in the presence of oxygen and produces carbon dioxide
and water?
Answer: Combustion
Rationale: Combustion reactions involve a fuel reacting with oxygen to produce carbon
dioxide, water, and energy.
2. Which is the correct formula for manganese (III) fluoride?
Answer: MnF₃
Rationale: Manganese (III) has a +3 charge and fluoride has a -1 charge, requiring three
fluoride ions.
3. Which is a good property of substances that exhibit metallic bonding?
Answer: Conduct electricity and heat well
Rationale: Metallic bonding involves mobile electrons that allow efficient conduction. (Low
melting points is generally incorrect because many metals have high melting points.)
4. Which law describes the proportional relationship between pressure and volume of a gas?
Answer: Boyle's Law
Rationale: Boyle's Law states that pressure and volume are inversely proportional when
temperature remains constant.
5. Which is true of binary ionic compounds?
, Answer: They consist of atoms of only two elements
Rationale: "Binary" means two elements, typically a metal and a nonmetal.
6. Which is the correct formula for chromium (II) nitrate?
Answer: Cr(NO₃)₂
Rationale: Chromium(II) is Cr²⁺ and nitrate is NO₃⁻, requiring two nitrate ions.
7. The ________ in a balanced equation specify volume ratios for gaseous reactants and
products.
Answer: Coefficients
Rationale: Coefficients represent mole ratios and gas volume ratios.
8. A + BX → AX + B represents which reaction type?
Answer: Single Replacement Reaction
Rationale: One element replaces another in a compound.
9. How many valence electrons does gallium (Ga) have?
Answer: 3
Rationale: Gallium belongs to Group 13.
10. Which is the number of protons in ⁵⁶₂₆Fe?
Answer: 26
Rationale: The atomic number (26) equals the number of protons. (56 is the mass number.)
11. Products of FeCl₃ + 3NH₄OH?
with correct answers and rationales
graded a+ for 2026 assured excel!!
General Chemistry Revision Guide with Rationales
1. Which type of reaction takes place in the presence of oxygen and produces carbon dioxide
and water?
Answer: Combustion
Rationale: Combustion reactions involve a fuel reacting with oxygen to produce carbon
dioxide, water, and energy.
2. Which is the correct formula for manganese (III) fluoride?
Answer: MnF₃
Rationale: Manganese (III) has a +3 charge and fluoride has a -1 charge, requiring three
fluoride ions.
3. Which is a good property of substances that exhibit metallic bonding?
Answer: Conduct electricity and heat well
Rationale: Metallic bonding involves mobile electrons that allow efficient conduction. (Low
melting points is generally incorrect because many metals have high melting points.)
4. Which law describes the proportional relationship between pressure and volume of a gas?
Answer: Boyle's Law
Rationale: Boyle's Law states that pressure and volume are inversely proportional when
temperature remains constant.
5. Which is true of binary ionic compounds?
, Answer: They consist of atoms of only two elements
Rationale: "Binary" means two elements, typically a metal and a nonmetal.
6. Which is the correct formula for chromium (II) nitrate?
Answer: Cr(NO₃)₂
Rationale: Chromium(II) is Cr²⁺ and nitrate is NO₃⁻, requiring two nitrate ions.
7. The ________ in a balanced equation specify volume ratios for gaseous reactants and
products.
Answer: Coefficients
Rationale: Coefficients represent mole ratios and gas volume ratios.
8. A + BX → AX + B represents which reaction type?
Answer: Single Replacement Reaction
Rationale: One element replaces another in a compound.
9. How many valence electrons does gallium (Ga) have?
Answer: 3
Rationale: Gallium belongs to Group 13.
10. Which is the number of protons in ⁵⁶₂₆Fe?
Answer: 26
Rationale: The atomic number (26) equals the number of protons. (56 is the mass number.)
11. Products of FeCl₃ + 3NH₄OH?
