Module 8 Portage 219 Organic
Chemistry Exam Revision Guide with
q&answers, Rationales sure pass!!
Chemistry Exam 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 occur when a substance reacts with oxygen, producing
carbon dioxide (CO₂), water (H₂O), and energy.
2. Which is the correct formula for the compound manganese (III) fluoride?
Answer: MnF₃
Rationale: Manganese (III) has a +3 charge (Mn³⁺), while fluoride has a −1 charge (F⁻). Three
fluoride ions are needed to balance one Mn³⁺ ion.
3. Which is a good property of substances that exhibit metallic bonding?
Answer: Conduct electricity and heat well
Rationale: Metallic bonding involves a "sea of electrons" that move freely, allowing metals
to conduct electricity and heat efficiently.
4. Which law describes the proportional relationship between the 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 (P₁V₁ = P₂V₂).
5. Which is true of binary ionic compounds?
, Answer: They consist of atoms of only two elements
Rationale: "Binary" means two. Binary ionic compounds contain one metal and one
nonmetal.
6. Which is the correct formula for the compound chromium (II) nitrate?
Answer: Cr(NO₃)₂
Rationale: Chromium (II) is Cr²⁺ and nitrate is NO₃⁻. Two nitrate ions are required to balance
the +2 charge.
7. The ________ in a balanced equation specify volume ratios for gaseous reactants and
products.
Answer: Coefficients
Rationale: Coefficients indicate the relative number of moles and gaseous volumes involved
in a reaction.
8. The equation A + BX → AX + B represents which type of reaction?
Answer: Single Replacement Reaction
Rationale: One element replaces another element in a compound.
9. Which is the correct number of valence electrons in gallium (Ga)?
Answer: 3
Rationale: Gallium belongs to Group 13 of the periodic table, whose elements have 3
valence electrons.
10. Which is the number of protons in ⁵⁶₂₆Fe?
Answer: 26
Rationale: The atomic number (26) always equals the number of protons.
11. Which are the products of FeCl₃ + 3NH₄OH?
Chemistry Exam Revision Guide with
q&answers, Rationales sure pass!!
Chemistry Exam 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 occur when a substance reacts with oxygen, producing
carbon dioxide (CO₂), water (H₂O), and energy.
2. Which is the correct formula for the compound manganese (III) fluoride?
Answer: MnF₃
Rationale: Manganese (III) has a +3 charge (Mn³⁺), while fluoride has a −1 charge (F⁻). Three
fluoride ions are needed to balance one Mn³⁺ ion.
3. Which is a good property of substances that exhibit metallic bonding?
Answer: Conduct electricity and heat well
Rationale: Metallic bonding involves a "sea of electrons" that move freely, allowing metals
to conduct electricity and heat efficiently.
4. Which law describes the proportional relationship between the 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 (P₁V₁ = P₂V₂).
5. Which is true of binary ionic compounds?
, Answer: They consist of atoms of only two elements
Rationale: "Binary" means two. Binary ionic compounds contain one metal and one
nonmetal.
6. Which is the correct formula for the compound chromium (II) nitrate?
Answer: Cr(NO₃)₂
Rationale: Chromium (II) is Cr²⁺ and nitrate is NO₃⁻. Two nitrate ions are required to balance
the +2 charge.
7. The ________ in a balanced equation specify volume ratios for gaseous reactants and
products.
Answer: Coefficients
Rationale: Coefficients indicate the relative number of moles and gaseous volumes involved
in a reaction.
8. The equation A + BX → AX + B represents which type of reaction?
Answer: Single Replacement Reaction
Rationale: One element replaces another element in a compound.
9. Which is the correct number of valence electrons in gallium (Ga)?
Answer: 3
Rationale: Gallium belongs to Group 13 of the periodic table, whose elements have 3
valence electrons.
10. Which is the number of protons in ⁵⁶₂₆Fe?
Answer: 26
Rationale: The atomic number (26) always equals the number of protons.
11. Which are the products of FeCl₃ + 3NH₄OH?
