A LEVEL CHEMISTRY OCR A ACTUAL EXAM
FULL QUESTIONS AND CORRECT ANSWERS
GRADED A PLUS
●● Homologus series
Answer: A family of compounds with similar chemical properties,
successive members differ by the addition of -CH2 group
●● functional group
Answer: Part of an organic molecule responsible for chemical properties
●● Some or all carbon atoms found in a benzene ring
Answer: aromatic
●● Carbon atoms form a ring with or without branches
Answer: alicyclic
●● A hydrocarbon with carbon atoms joined together in straight or
branched chains.
Answer: aliphatic
●● Unsaturated hydrocarbon with at least 1 double carbon bond
,Answer: alkene
●● Unsaturated hydrocarbon with at least 1 triple carbon bond
Answer: alkyne
●● saturated hydrocarbon containing single carbon bonds
Answer: alkane
●● a formula denoting the number of atoms in a molecule
Answer: molecular
●● simplest whole-number ratio of atoms in a compound
Answer: empirical formula
●● The simplest algebraic formula of a member of a homologous series
Answer: general
●● shows the relative positioning of atoms and bonds
Answer: displayed formular
●● arrangement of atoms using the smallest level of detail
Answer: structural formula eg (CH3CH2CH3)
,●● simplified organic formula
Answer: skeletal
●● same molecule formula but different structural formula
Answer: structural isomer
●● breaking covalent bonds process
Answer: bond fission
●● each atom has a single unpaired electron and 2 radicals are formed
Answer: homolytic fission
●● An atom takes both electrons, leaving one positive and one negative
ion
Answer: heterolytic fission
●● A molecule is added to an unsaturated alkene
Answer: addition reaction
●● an atom/group of atoms is replaced by an atom/group of atoms
Answer: substitution reaction
, ●● the removal fo a small molecule from a larger one
Answer: elimination reaction
●● arrow representing the movement of a single, unpaired electric in
mechanisms
Answer: curly arrow
●● an atom or groups of atoms with an unpaired electron
Answer: radical
●● are c-c bonds polar or non-polar
Answer: non-polar
●● alkanes produce carbon dioxide and water through what process
Answer: complete combustion
●● alkanes produce what in incomplete combustion?
Answer: CO, C, CO2 and H2O
●● alkanes react with ______ in the presence of UV (sunlight)
Answer: halogens
FULL QUESTIONS AND CORRECT ANSWERS
GRADED A PLUS
●● Homologus series
Answer: A family of compounds with similar chemical properties,
successive members differ by the addition of -CH2 group
●● functional group
Answer: Part of an organic molecule responsible for chemical properties
●● Some or all carbon atoms found in a benzene ring
Answer: aromatic
●● Carbon atoms form a ring with or without branches
Answer: alicyclic
●● A hydrocarbon with carbon atoms joined together in straight or
branched chains.
Answer: aliphatic
●● Unsaturated hydrocarbon with at least 1 double carbon bond
,Answer: alkene
●● Unsaturated hydrocarbon with at least 1 triple carbon bond
Answer: alkyne
●● saturated hydrocarbon containing single carbon bonds
Answer: alkane
●● a formula denoting the number of atoms in a molecule
Answer: molecular
●● simplest whole-number ratio of atoms in a compound
Answer: empirical formula
●● The simplest algebraic formula of a member of a homologous series
Answer: general
●● shows the relative positioning of atoms and bonds
Answer: displayed formular
●● arrangement of atoms using the smallest level of detail
Answer: structural formula eg (CH3CH2CH3)
,●● simplified organic formula
Answer: skeletal
●● same molecule formula but different structural formula
Answer: structural isomer
●● breaking covalent bonds process
Answer: bond fission
●● each atom has a single unpaired electron and 2 radicals are formed
Answer: homolytic fission
●● An atom takes both electrons, leaving one positive and one negative
ion
Answer: heterolytic fission
●● A molecule is added to an unsaturated alkene
Answer: addition reaction
●● an atom/group of atoms is replaced by an atom/group of atoms
Answer: substitution reaction
, ●● the removal fo a small molecule from a larger one
Answer: elimination reaction
●● arrow representing the movement of a single, unpaired electric in
mechanisms
Answer: curly arrow
●● an atom or groups of atoms with an unpaired electron
Answer: radical
●● are c-c bonds polar or non-polar
Answer: non-polar
●● alkanes produce carbon dioxide and water through what process
Answer: complete combustion
●● alkanes produce what in incomplete combustion?
Answer: CO, C, CO2 and H2O
●● alkanes react with ______ in the presence of UV (sunlight)
Answer: halogens
