AQA GCSE COMBINED SCIENCE TRILOGY
8464 C 1H HIGHER TIER CHEMISTRY PAPER 1H
CERTIFICATION EVALUATION EXAMS 2026
QUESTIONS WITH SOLUTIONS GUARANTEED
PASS
◉ Why can carbon form a vast number of compounds? Answer:
Because it can form strong covalent bonds with itself, enabling long
chains of carbon atoms.
◉ How many covalent bonds does carbon always form? Answer:
Four covalent bonds, which can be single, double, or triple bonds.
◉ What is a functional group? Answer: A specific atom or group of
atoms that confer certain physical and chemical properties onto a
molecule.
◉ What defines a homologous series? Answer: Organic compounds
with the same functional group but different numbers of carbon
atoms.
◉ What happens when a carbon atom is added to a chain in a
homologous series? Answer: Two hydrogen atoms are also added.
, ◉ What is a general formula in organic chemistry? Answer: A
formula that tells you the composition of any member of a whole
homologous series of organic compounds.
◉ What is the general formula for alkanes? Answer: CnH2n+2.
◉ What do displayed formulae show? Answer: The spatial
arrangement of all the atoms and bonds in a molecule.
◉ What is the difference between molecular and structural
formulae? Answer: Molecular formulae show the actual number of
each atom in a molecule, while structural formulae provide enough
information to clarify the structure but omit most actual covalent
bonds.
◉ What is the significance of -CH2- in a homologous series? Answer:
Each subsequent member of the series differs by -CH2-.
◉ What are the physical properties that change in a homologous
series? Answer: Boiling point, melting point, and density.
◉ What is crude oil? Answer: A finite resource that is a complex
mixture of different hydrocarbon compounds.
8464 C 1H HIGHER TIER CHEMISTRY PAPER 1H
CERTIFICATION EVALUATION EXAMS 2026
QUESTIONS WITH SOLUTIONS GUARANTEED
PASS
◉ Why can carbon form a vast number of compounds? Answer:
Because it can form strong covalent bonds with itself, enabling long
chains of carbon atoms.
◉ How many covalent bonds does carbon always form? Answer:
Four covalent bonds, which can be single, double, or triple bonds.
◉ What is a functional group? Answer: A specific atom or group of
atoms that confer certain physical and chemical properties onto a
molecule.
◉ What defines a homologous series? Answer: Organic compounds
with the same functional group but different numbers of carbon
atoms.
◉ What happens when a carbon atom is added to a chain in a
homologous series? Answer: Two hydrogen atoms are also added.
, ◉ What is a general formula in organic chemistry? Answer: A
formula that tells you the composition of any member of a whole
homologous series of organic compounds.
◉ What is the general formula for alkanes? Answer: CnH2n+2.
◉ What do displayed formulae show? Answer: The spatial
arrangement of all the atoms and bonds in a molecule.
◉ What is the difference between molecular and structural
formulae? Answer: Molecular formulae show the actual number of
each atom in a molecule, while structural formulae provide enough
information to clarify the structure but omit most actual covalent
bonds.
◉ What is the significance of -CH2- in a homologous series? Answer:
Each subsequent member of the series differs by -CH2-.
◉ What are the physical properties that change in a homologous
series? Answer: Boiling point, melting point, and density.
◉ What is crude oil? Answer: A finite resource that is a complex
mixture of different hydrocarbon compounds.
