AQA GCSE COMBINED SCIENCE: TRILOGY
8464/C/2F CHEMISTRY PAPER 2F
8464/C/2F PAPER & MARK SCHEME
ACTUAL EXAM PAPER 2026 QUESTIONS
WITH ANSWERS GRADED A+
◍ Describe the process of simple distillation.
Answer: First we evaporate the mixture by heating it, the dissolved solid
then vaporises. These vapours condense in the condenser, the dissolved
solid then flows into the beaker and liquid stays in the flask
◍ monomer.
Answer: A simple compound whose molecules can join together to form
polymers
◍ How do you carry out a titration?.
Answer: Fill up a flask with 25cm³ of sodium hydroxide solution, then add 5
drops of indicator to the solution, then place the flask on a white tile so we
can see the colour change. Fill a burette with sulfuric acid. Slowly add the
acid into the alkali until it nuetralsises, read the volume, record the results
on the burette
◍ Conservation of Mass.
Answer: In a chemical reaction the total mass of reactants = total mass of
products
◍ Why can't ionic compounds conduct electricity when they are solids?.
Answer: Ionic compounds can't conduct electricity when they are solids
because the ions cannot move, they are locked in place by strong
electrostatic forces
,◍ sulfuric acid.
Answer: H₂SO₄
◍ Give an example of a displacement reaction.
Answer: Sodium Bromide + Fluorine → Sodium + Bromine Fluoride
◍ Pure.
Answer: Made of one substance. Can be an element or compound.
◍ How do elements form compounds?.
Answer: Elements form compounds by gaining or losing electrons or by
sharing electrons
◍ What is formed when an acid reacts with a base?.
Answer: Acid + Base → Salt + Water
◍ Alloy.
Answer: A mixture of two or more elements, at least one of which is a
metal. Harder than pure metals.
◍ ionic equation.
Answer: a chemical equation where the electrolytes in aqueous solution are
written as dissociated ions
◍ Alkenes.
Answer: Hydrocarbon with a double covalent bond C=CKnown as
unsaturated hydrocarbonsHas twice as many H as C atomspicture attatched
is Ethane
◍ What is oxidation?.
Answer: Oxidation is loss of electrons
◍ Why does silicon dioxide have a high melting and boiling point?.
Answer: Silicon dioxide has a high melting and boiling point because it is
made up of strong covalent bonds and a lot of heat energy is required to
break its bonds
◍ Why can't solid ionic compounds conduct electricity?.
, Answer: Solid ionic compounds cannot conduct electricity because the ions
are locked in place by strong electrostatic forces and cannot move
◍ limiting reactant.
Answer: The reactant that runs out first in the chemical reaction and limits
the amount of product created
◍ density.
Answer: Mass / Volume; A measure of how much mass is contained in a
given volume.
◍ What is the size of a nanometre?.
Answer: A nanometre is 1 x 10⁻⁹ metre
◍ What is the pH scale?.
Answer: The pH scale is a scale from 1-14 that tell us the acidity or
alkalinity of a solution
◍ How do you calculate the energy change of a reaction?.
Answer: To calculate the energy of a reaction you need two things the
structure of the molecules and the energy value of each bond, add up the
energy need to break all the reactants and the energy need to make all the
products, the difference between the energy needed for the reactants and the
energy needed for the products is the energy change
◍ What does the modern periodic table look like?.
Answer: Elements are arranged in order of atomic number, the elements are
organised in groups and periods which have the similar properties
◍ Why is it not possible to achieve 100% yield in a chemical reaction.
Answer: It is not possible to achieve 100% yield in a chemical reaction as
some of the product may be lost and the reactants may react in differently
way so we don't get the product expected, reversible reactions may not go to
completion
◍ compound.
Answer: A substance made up of atoms of two or more different elements
8464/C/2F CHEMISTRY PAPER 2F
8464/C/2F PAPER & MARK SCHEME
ACTUAL EXAM PAPER 2026 QUESTIONS
WITH ANSWERS GRADED A+
◍ Describe the process of simple distillation.
Answer: First we evaporate the mixture by heating it, the dissolved solid
then vaporises. These vapours condense in the condenser, the dissolved
solid then flows into the beaker and liquid stays in the flask
◍ monomer.
Answer: A simple compound whose molecules can join together to form
polymers
◍ How do you carry out a titration?.
Answer: Fill up a flask with 25cm³ of sodium hydroxide solution, then add 5
drops of indicator to the solution, then place the flask on a white tile so we
can see the colour change. Fill a burette with sulfuric acid. Slowly add the
acid into the alkali until it nuetralsises, read the volume, record the results
on the burette
◍ Conservation of Mass.
Answer: In a chemical reaction the total mass of reactants = total mass of
products
◍ Why can't ionic compounds conduct electricity when they are solids?.
Answer: Ionic compounds can't conduct electricity when they are solids
because the ions cannot move, they are locked in place by strong
electrostatic forces
,◍ sulfuric acid.
Answer: H₂SO₄
◍ Give an example of a displacement reaction.
Answer: Sodium Bromide + Fluorine → Sodium + Bromine Fluoride
◍ Pure.
Answer: Made of one substance. Can be an element or compound.
◍ How do elements form compounds?.
Answer: Elements form compounds by gaining or losing electrons or by
sharing electrons
◍ What is formed when an acid reacts with a base?.
Answer: Acid + Base → Salt + Water
◍ Alloy.
Answer: A mixture of two or more elements, at least one of which is a
metal. Harder than pure metals.
◍ ionic equation.
Answer: a chemical equation where the electrolytes in aqueous solution are
written as dissociated ions
◍ Alkenes.
Answer: Hydrocarbon with a double covalent bond C=CKnown as
unsaturated hydrocarbonsHas twice as many H as C atomspicture attatched
is Ethane
◍ What is oxidation?.
Answer: Oxidation is loss of electrons
◍ Why does silicon dioxide have a high melting and boiling point?.
Answer: Silicon dioxide has a high melting and boiling point because it is
made up of strong covalent bonds and a lot of heat energy is required to
break its bonds
◍ Why can't solid ionic compounds conduct electricity?.
, Answer: Solid ionic compounds cannot conduct electricity because the ions
are locked in place by strong electrostatic forces and cannot move
◍ limiting reactant.
Answer: The reactant that runs out first in the chemical reaction and limits
the amount of product created
◍ density.
Answer: Mass / Volume; A measure of how much mass is contained in a
given volume.
◍ What is the size of a nanometre?.
Answer: A nanometre is 1 x 10⁻⁹ metre
◍ What is the pH scale?.
Answer: The pH scale is a scale from 1-14 that tell us the acidity or
alkalinity of a solution
◍ How do you calculate the energy change of a reaction?.
Answer: To calculate the energy of a reaction you need two things the
structure of the molecules and the energy value of each bond, add up the
energy need to break all the reactants and the energy need to make all the
products, the difference between the energy needed for the reactants and the
energy needed for the products is the energy change
◍ What does the modern periodic table look like?.
Answer: Elements are arranged in order of atomic number, the elements are
organised in groups and periods which have the similar properties
◍ Why is it not possible to achieve 100% yield in a chemical reaction.
Answer: It is not possible to achieve 100% yield in a chemical reaction as
some of the product may be lost and the reactants may react in differently
way so we don't get the product expected, reversible reactions may not go to
completion
◍ compound.
Answer: A substance made up of atoms of two or more different elements
