AQA GCSE COMBINED SCIENCE: TRILOGY
8464/C/2H HIGHER TIER CHEMISTRY
PAPER 2H PAPER & MARK SCHEME
CERTIFICATION SCRIPT 2026 QUESTIONS
WITH SOLUTIONS GRADED A+
◍ They're expensive, and need to be charged more often than petrol cars.
Answer: Give two cons for using Hydrogen
◍ Nanoparticles are used in medicines, creams and catalysts.
Answer: Name some uses of nanoparticles
◍ What is the structure of level of response marking instructions?.
Answer: Broken down into levels with descriptors for average performance.
◍ An element at the top has less distance between the nucleus and the outer
energy level so it gains electrons easier.
Answer: Why is it harder for an element at the bottom of the group to gain
an electron that an element at the top of the group?
◍ Electrodes are made of inert substance that doesn't react with the products
such as graphite.
Answer: What are electrodes usually made of?
◍ The particle theory describes the movement and arrangement of particles.
Answer: What is the particle theory?
◍ Where can further copies of the mark scheme be obtained?.
Answer: From aqa.org.uk.
◍ A base which dissolved in water (soluble).
, Answer: What is a alkali?
◍ What is the molecular mass of ammonia (NH3)?.
Answer: 17.
◍ No vehicle emissions other than water vapour, it can be made from
renewable energy.
Answer: Give two pros for using Hydrogen
◍ Add universal indicator, check colour change.
Answer: How do you test the ph of a solution?
◍ Because they don't have an overall electric charge.
Answer: Why can't Covalent Molecules conduct electricity ?
◍ How is gender identity treated in exam responses?.
Answer: No student should be disadvantaged based on gender identity.
◍ Increases.
Answer: What happens to the temperature of the surroundings in an
exothermic reaction?
◍ What is the principle for marking lists with extra responses?.
Answer: Right + wrong = wrong.
◍ No.
Answer: Can diamond conduct electricity?
◍ What does 'allow' mean in the mark scheme?.
Answer: Indicates creditworthy alternative answers.
◍ What is the formula for calculating the mass of copper?.
Answer: (% copper = 100 - 13.5) × 5.25.
◍ The law of conservation of mass states that the total mass of the reactants in
a chemical reaction is equal to the mass of the product.
Answer: What is the Law of Conservation of Mass?
◍ that they are tiny spheres that cannot be divided.
Answer: What were the early ideas of the structure of atoms?
,◍ Non metal ions are oxidised.
Answer: What happens at the anode?
◍ Metals are good conductors of heat and electricity.
Answer: Are metals good or bad conductors of heat and electricity?
◍ What happens to calcium and chlorine atoms during their reaction?.
Answer: Each calcium atom loses two electrons and each chlorine atom
gains one electron.
◍ How many covalent bonds does each carbon atom form in a nanotube?.
Answer: Each carbon atom forms three covalent bonds.
◍ The more reactive metal has a higher tendency to give away electrons and
form positive ions.
Answer: What effect does the reactivity of a metal have on the tendency to
give away electrons and form positive ions?
◍ What is completely ionised in aqueous solution?.
Answer: Substances that allow completely ionised (when dissolved) in
water.
◍ What approach should be used when assigning a level?.
Answer: Use a best fit approach for defining the level based on overall
quality.
◍ What should be avoided when assuming future mark schemes?.
Answer: Assumptions based on one year's document.
◍ What gas escapes from the test tube during the reaction?.
Answer: Carbon dioxide.
◍ What is the shape of the energy diagram for an exothermic reaction?.
Answer: The product line is below the level of the reactants line.
◍ Anions, the metal, because they form positive ions.
Answer: What ions go to the cathode and why?
◍ What does the mark scheme include?.
, Answer: Marks available, typical answers, extra information for marking,
assessment objectives.
◍ Particles with sufficient energy to collide with each other.
Answer: What is needed for reaction to occur?
◍ What is the importance of variability in responses?.
Answer: It helps decide the mark within the assigned level.
◍ What pronouns are credited in exam responses?.
Answer: 'They/them' as singular and pronouns beyond 'she/her' or 'he/him'.
◍ They are hard, strong and have a high density and melting point, are good
conductors and can be used as catalysts.
Answer: Name some properties of transition elements
◍ They have high melting and boiling points because they have millions of
strong covalent bonds.
Answer: Do giant covalent molecules have high or low melting and boiling
points?
◍ It gains an electron and forms a 1- charge.
Answer: When a group 7 element reacts with a metal what charges does the
group 7 element have?
◍ What is the role of the panel of subject teachers in mark schemes?.
Answer: To consider the mark scheme alongside relevant questions.
◍ What happens to the electrons in carbon nanotubes?.
Answer: One electron from each carbon atom is delocalised.
◍ The gas in the reaction will float away so it appears to break the law.
Answer: Explain why reactions involving gas appear to break the law?
◍ What is the requirement for responses using the word 'it'?.
Answer: Credit only if it is clear what 'it' refers to.
◍ What is the guideline for awarding marks for calculations without working
shown?.
8464/C/2H HIGHER TIER CHEMISTRY
PAPER 2H PAPER & MARK SCHEME
CERTIFICATION SCRIPT 2026 QUESTIONS
WITH SOLUTIONS GRADED A+
◍ They're expensive, and need to be charged more often than petrol cars.
Answer: Give two cons for using Hydrogen
◍ Nanoparticles are used in medicines, creams and catalysts.
Answer: Name some uses of nanoparticles
◍ What is the structure of level of response marking instructions?.
Answer: Broken down into levels with descriptors for average performance.
◍ An element at the top has less distance between the nucleus and the outer
energy level so it gains electrons easier.
Answer: Why is it harder for an element at the bottom of the group to gain
an electron that an element at the top of the group?
◍ Electrodes are made of inert substance that doesn't react with the products
such as graphite.
Answer: What are electrodes usually made of?
◍ The particle theory describes the movement and arrangement of particles.
Answer: What is the particle theory?
◍ Where can further copies of the mark scheme be obtained?.
Answer: From aqa.org.uk.
◍ A base which dissolved in water (soluble).
, Answer: What is a alkali?
◍ What is the molecular mass of ammonia (NH3)?.
Answer: 17.
◍ No vehicle emissions other than water vapour, it can be made from
renewable energy.
Answer: Give two pros for using Hydrogen
◍ Add universal indicator, check colour change.
Answer: How do you test the ph of a solution?
◍ Because they don't have an overall electric charge.
Answer: Why can't Covalent Molecules conduct electricity ?
◍ How is gender identity treated in exam responses?.
Answer: No student should be disadvantaged based on gender identity.
◍ Increases.
Answer: What happens to the temperature of the surroundings in an
exothermic reaction?
◍ What is the principle for marking lists with extra responses?.
Answer: Right + wrong = wrong.
◍ No.
Answer: Can diamond conduct electricity?
◍ What does 'allow' mean in the mark scheme?.
Answer: Indicates creditworthy alternative answers.
◍ What is the formula for calculating the mass of copper?.
Answer: (% copper = 100 - 13.5) × 5.25.
◍ The law of conservation of mass states that the total mass of the reactants in
a chemical reaction is equal to the mass of the product.
Answer: What is the Law of Conservation of Mass?
◍ that they are tiny spheres that cannot be divided.
Answer: What were the early ideas of the structure of atoms?
,◍ Non metal ions are oxidised.
Answer: What happens at the anode?
◍ Metals are good conductors of heat and electricity.
Answer: Are metals good or bad conductors of heat and electricity?
◍ What happens to calcium and chlorine atoms during their reaction?.
Answer: Each calcium atom loses two electrons and each chlorine atom
gains one electron.
◍ How many covalent bonds does each carbon atom form in a nanotube?.
Answer: Each carbon atom forms three covalent bonds.
◍ The more reactive metal has a higher tendency to give away electrons and
form positive ions.
Answer: What effect does the reactivity of a metal have on the tendency to
give away electrons and form positive ions?
◍ What is completely ionised in aqueous solution?.
Answer: Substances that allow completely ionised (when dissolved) in
water.
◍ What approach should be used when assigning a level?.
Answer: Use a best fit approach for defining the level based on overall
quality.
◍ What should be avoided when assuming future mark schemes?.
Answer: Assumptions based on one year's document.
◍ What gas escapes from the test tube during the reaction?.
Answer: Carbon dioxide.
◍ What is the shape of the energy diagram for an exothermic reaction?.
Answer: The product line is below the level of the reactants line.
◍ Anions, the metal, because they form positive ions.
Answer: What ions go to the cathode and why?
◍ What does the mark scheme include?.
, Answer: Marks available, typical answers, extra information for marking,
assessment objectives.
◍ Particles with sufficient energy to collide with each other.
Answer: What is needed for reaction to occur?
◍ What is the importance of variability in responses?.
Answer: It helps decide the mark within the assigned level.
◍ What pronouns are credited in exam responses?.
Answer: 'They/them' as singular and pronouns beyond 'she/her' or 'he/him'.
◍ They are hard, strong and have a high density and melting point, are good
conductors and can be used as catalysts.
Answer: Name some properties of transition elements
◍ They have high melting and boiling points because they have millions of
strong covalent bonds.
Answer: Do giant covalent molecules have high or low melting and boiling
points?
◍ It gains an electron and forms a 1- charge.
Answer: When a group 7 element reacts with a metal what charges does the
group 7 element have?
◍ What is the role of the panel of subject teachers in mark schemes?.
Answer: To consider the mark scheme alongside relevant questions.
◍ What happens to the electrons in carbon nanotubes?.
Answer: One electron from each carbon atom is delocalised.
◍ The gas in the reaction will float away so it appears to break the law.
Answer: Explain why reactions involving gas appear to break the law?
◍ What is the requirement for responses using the word 'it'?.
Answer: Credit only if it is clear what 'it' refers to.
◍ What is the guideline for awarding marks for calculations without working
shown?.
