SCH4U GRADE 12 CHEMISTRY FINAL
CERTIFICATION SCRIPT 2026 QUESTIONS
WITH SOLUTIONS GRADED A+
◍ endothermic.
Answer: process that absorbs heat from its surroundings as the reaction
proceeds
◍ What is the term for elements in groups 3-12 of the periodic table?.
Answer: c. transition metals
◍ exothermic.
Answer: process that gives off heat to the environment
◍ Main ingredients of natural gas.
Answer: mostly methane, pentane, butane, carbon dioxide, propane,
nitrogen, ethane
◍ Are the following structures isomers? Why or why not?.
Answer: Yes; they have the same molecular formula
◍ Q45: Define exothermic.
Answer: Releases energy
◍ Iodine is an important mineral in the proper functioning of the.
Answer: thyroid
◍ Amide.
Answer: has a double bond oxygen UNLIKE amine
◍ Q79: Why is water called the universal solvent?.
Answer: Because it dissolves more solutes than anything elseWater
dissolves 57 of the 92 elements
,◍ atomic number.
Answer: number of protons in an element
◍ reactants.
Answer: Substances initially present in a chemical reaction
◍ radioactive.
Answer: Substance containing an element which decays
◍ Q74: What is the molarity when 0.75 mol is dissolved in 2.50 L of solution?.
Answer: Using water the mass of the solvent will be 2.50kg. The density of
water is 1g = 1mLMolarity = .75/2.5 = .30 m
◍ Which metal is frequently used in writing because of its excellent
conductivity and corrosion resistance?.
Answer: b. copper
◍ hydrolysis.
Answer: the reactions of cations with water to produce a weak base or of
anions to produce a weak acid
◍ What type of nuclear decay occurs when an unstable atom emits
electromagnetic waves of very high frequency and energy?.
Answer: c. gamma decay
◍ single replacement reaction.
Answer: a chemical change in which one element replaces a second element
in a compound
◍ Accuracy.
Answer: how close a measurement is to the actual value
◍ A molecule central atom has three single bonds and one non-binding
electron pair; what is the molecule shape?.
Answer: Trigonal pyramidal
◍ What is a nucleotide?.
Answer: b. molecule consisting of a nitrogen-containing base, a sugar, and
one or more phosphate groups
, ◍ Consider the following exothermic reaction: 5 (75).
Answer: d. No; adding a solid does not shift the equilibrium.
◍ Yellow light has a wavelength of 590 nm. What is the energy of this light?.
Answer: 3.37 x 10^-19 J
◍ ionization energy trend.
Answer: decreases from top to bottom in a group; increases from left to right
in a period
◍ Aldehyde.
Answer:
◍ Q61: A gas has a temperature of 14 degrees C and a volume of 4.5 liters. If
the temperature is raised to 29 degrees C and the pressure is not changed,
what is the new volume of gas?.
Answer: Volume = 6.672 liters = .48.48 + 11.48 * 4.5 = 6.672
◍ A nuclear reaction that evolves combining two smaller atomic nuclei into
one large nucleus is a what reaction?.
Answer: Fusion
◍ what is the mass in grams of 2.5 moles of ammonia, NH 3?.
Answer: 42.5 g1. Get atomic mass for Nitrogen/ Hydrogen add them 2.
Multiple answer by 2.5 moles
◍ Permanganate.
Answer: MnO₄⁻
◍ What is the oxidation state of Mn in KMnO4?.
Answer: +7
◍ electronegativity.
Answer: measure of a substance's ability to attract electrons
◍ What is the electron configuration of chlorine (Cl)?.
Answer: A. 1s22s22p63s23p3B. 1s22s22p63s23p5C.
1s22s22p63s24s23p3D. 1s22s22p63s23p23d3B. 1s22s22p63s23p5
CERTIFICATION SCRIPT 2026 QUESTIONS
WITH SOLUTIONS GRADED A+
◍ endothermic.
Answer: process that absorbs heat from its surroundings as the reaction
proceeds
◍ What is the term for elements in groups 3-12 of the periodic table?.
Answer: c. transition metals
◍ exothermic.
Answer: process that gives off heat to the environment
◍ Main ingredients of natural gas.
Answer: mostly methane, pentane, butane, carbon dioxide, propane,
nitrogen, ethane
◍ Are the following structures isomers? Why or why not?.
Answer: Yes; they have the same molecular formula
◍ Q45: Define exothermic.
Answer: Releases energy
◍ Iodine is an important mineral in the proper functioning of the.
Answer: thyroid
◍ Amide.
Answer: has a double bond oxygen UNLIKE amine
◍ Q79: Why is water called the universal solvent?.
Answer: Because it dissolves more solutes than anything elseWater
dissolves 57 of the 92 elements
,◍ atomic number.
Answer: number of protons in an element
◍ reactants.
Answer: Substances initially present in a chemical reaction
◍ radioactive.
Answer: Substance containing an element which decays
◍ Q74: What is the molarity when 0.75 mol is dissolved in 2.50 L of solution?.
Answer: Using water the mass of the solvent will be 2.50kg. The density of
water is 1g = 1mLMolarity = .75/2.5 = .30 m
◍ Which metal is frequently used in writing because of its excellent
conductivity and corrosion resistance?.
Answer: b. copper
◍ hydrolysis.
Answer: the reactions of cations with water to produce a weak base or of
anions to produce a weak acid
◍ What type of nuclear decay occurs when an unstable atom emits
electromagnetic waves of very high frequency and energy?.
Answer: c. gamma decay
◍ single replacement reaction.
Answer: a chemical change in which one element replaces a second element
in a compound
◍ Accuracy.
Answer: how close a measurement is to the actual value
◍ A molecule central atom has three single bonds and one non-binding
electron pair; what is the molecule shape?.
Answer: Trigonal pyramidal
◍ What is a nucleotide?.
Answer: b. molecule consisting of a nitrogen-containing base, a sugar, and
one or more phosphate groups
, ◍ Consider the following exothermic reaction: 5 (75).
Answer: d. No; adding a solid does not shift the equilibrium.
◍ Yellow light has a wavelength of 590 nm. What is the energy of this light?.
Answer: 3.37 x 10^-19 J
◍ ionization energy trend.
Answer: decreases from top to bottom in a group; increases from left to right
in a period
◍ Aldehyde.
Answer:
◍ Q61: A gas has a temperature of 14 degrees C and a volume of 4.5 liters. If
the temperature is raised to 29 degrees C and the pressure is not changed,
what is the new volume of gas?.
Answer: Volume = 6.672 liters = .48.48 + 11.48 * 4.5 = 6.672
◍ A nuclear reaction that evolves combining two smaller atomic nuclei into
one large nucleus is a what reaction?.
Answer: Fusion
◍ what is the mass in grams of 2.5 moles of ammonia, NH 3?.
Answer: 42.5 g1. Get atomic mass for Nitrogen/ Hydrogen add them 2.
Multiple answer by 2.5 moles
◍ Permanganate.
Answer: MnO₄⁻
◍ What is the oxidation state of Mn in KMnO4?.
Answer: +7
◍ electronegativity.
Answer: measure of a substance's ability to attract electrons
◍ What is the electron configuration of chlorine (Cl)?.
Answer: A. 1s22s22p63s23p3B. 1s22s22p63s23p5C.
1s22s22p63s24s23p3D. 1s22s22p63s23p23d3B. 1s22s22p63s23p5
