AS-level AQA Chemistry Exam Prep
Test|Questions with Complete Solutions
Latest Update 2024
Boyle's law - ANSWER The volume of a fixed mass of gas (at a constant temperature) is inversely
proportional to its pressure
Burette - ANSWER Labatory apparatus used to add precise volumes of liquid during a titration
Carbocation - ANSWER Ion with a positively charged carbon atom
Carbonyl - ANSWER An organic compound containing the -C+O functional group, found
in baldheads and ketones
Carboxyl - ANSWER An organic compound containing the _COOH functional group
Carboxylic acid - ANSWER Organic acids with the general formula RCOOH. Their names end in -
oic acid
Cation - ANSWER A positively charged ion, attracted to the cathodde during electrolysis
CFC - ANSWER Abbreviation for chloroflurocarbon, a hydrocarbon in which some or all the
hydrogen atoms are replaced by chlorine and fluorine atoms
Chain isomerism - ANSWER A type of structural isomerism in which compounds have identical
molecular formulae but their carbon atoms are joined together in different arrangments. Chain
isomers involve branched and unbranched carbon chains
,Charge density - ANSWER The charge: size ratio of an ion. Small ions with high charges
have large charge densities
Charle's law - ANSWER The volume of a fixed mass of gas (at constant pressure) is proportional
to its aboslute temperature
Coke - ANSWER Solid produced by heating coal in the absence of air, almost pure carbon
Complete combustion - ANSWER Burning a fuel in excess oxygen. Carbon dioxide and water
vapour are produced from the complete combustion of hydrocarbons
Concordant results - ANSWER Titres that are in agreement usually within 0.10cm3 of each other
Continous process - ANSWER An industrial process in which products are made all the
time without any break. Production of iron in the blast furnace is a continuous process
Co-ordinate bond - ANSWER A covalent bond in which the shared pair of electrons is
provided by only one of the bonded atoms. In the bond X_>Y, X provides both electrons
Covalent bond - ANSWER A shared pair of electrons
Cracking - ANSWER A process used by the petroleum industry to produce shorter alkanes and
alkenes from longer alkanes
Cyclic - ANSWER Hydrocarbons in which there are closed rings of carbon atoms are described as
cyclic
D block - ANSWER The central section of the periodic table between groups 2 and 3
containing the transition metals
Dative covalent bond - ANSWER Another name for a coordinate bond
, Decomposition reaction - ANSWER A reaction where one substance is broken down into two or
more different substances
Deflection - ANSWER The stage in mass spectrometry where positive ions are moved from their
original path by a magnetic field
Dehydration reaction - ANSWER A reaction where elements hydrogen and oxygen are removed
from a reactant in the ratio of 2:1 effectively the removal of water
Delocalized - ANSWER Electrons that are free to move between all atoms in a structure
are delocalized. Delocalized electrons are found in metals and graphite
Detection - ANSWER The stage in mass spectrometry where positive ions reach a detector
and produce an electrical signal
Diastereoisomers - ANSWER Stereoisomers that are mirror images of each other,
sometimes called geometrical isomers
Diatomic - ANSWER A molcule containing just two atoms
Dimer - ANSWER A molecule consisting of two monomer molecules joined together
Dipole - ANSWER Opposite charges separated by a short distance in a molecule or ion
Displace - ANSWER To replace an atom or ion in a compound in a chemical reaction eg chlorine
displaces iodine in sodium iodide
Displayed formula - ANSWER A chemical formula showing all the atoms in a compound and
their bonds
Test|Questions with Complete Solutions
Latest Update 2024
Boyle's law - ANSWER The volume of a fixed mass of gas (at a constant temperature) is inversely
proportional to its pressure
Burette - ANSWER Labatory apparatus used to add precise volumes of liquid during a titration
Carbocation - ANSWER Ion with a positively charged carbon atom
Carbonyl - ANSWER An organic compound containing the -C+O functional group, found
in baldheads and ketones
Carboxyl - ANSWER An organic compound containing the _COOH functional group
Carboxylic acid - ANSWER Organic acids with the general formula RCOOH. Their names end in -
oic acid
Cation - ANSWER A positively charged ion, attracted to the cathodde during electrolysis
CFC - ANSWER Abbreviation for chloroflurocarbon, a hydrocarbon in which some or all the
hydrogen atoms are replaced by chlorine and fluorine atoms
Chain isomerism - ANSWER A type of structural isomerism in which compounds have identical
molecular formulae but their carbon atoms are joined together in different arrangments. Chain
isomers involve branched and unbranched carbon chains
,Charge density - ANSWER The charge: size ratio of an ion. Small ions with high charges
have large charge densities
Charle's law - ANSWER The volume of a fixed mass of gas (at constant pressure) is proportional
to its aboslute temperature
Coke - ANSWER Solid produced by heating coal in the absence of air, almost pure carbon
Complete combustion - ANSWER Burning a fuel in excess oxygen. Carbon dioxide and water
vapour are produced from the complete combustion of hydrocarbons
Concordant results - ANSWER Titres that are in agreement usually within 0.10cm3 of each other
Continous process - ANSWER An industrial process in which products are made all the
time without any break. Production of iron in the blast furnace is a continuous process
Co-ordinate bond - ANSWER A covalent bond in which the shared pair of electrons is
provided by only one of the bonded atoms. In the bond X_>Y, X provides both electrons
Covalent bond - ANSWER A shared pair of electrons
Cracking - ANSWER A process used by the petroleum industry to produce shorter alkanes and
alkenes from longer alkanes
Cyclic - ANSWER Hydrocarbons in which there are closed rings of carbon atoms are described as
cyclic
D block - ANSWER The central section of the periodic table between groups 2 and 3
containing the transition metals
Dative covalent bond - ANSWER Another name for a coordinate bond
, Decomposition reaction - ANSWER A reaction where one substance is broken down into two or
more different substances
Deflection - ANSWER The stage in mass spectrometry where positive ions are moved from their
original path by a magnetic field
Dehydration reaction - ANSWER A reaction where elements hydrogen and oxygen are removed
from a reactant in the ratio of 2:1 effectively the removal of water
Delocalized - ANSWER Electrons that are free to move between all atoms in a structure
are delocalized. Delocalized electrons are found in metals and graphite
Detection - ANSWER The stage in mass spectrometry where positive ions reach a detector
and produce an electrical signal
Diastereoisomers - ANSWER Stereoisomers that are mirror images of each other,
sometimes called geometrical isomers
Diatomic - ANSWER A molcule containing just two atoms
Dimer - ANSWER A molecule consisting of two monomer molecules joined together
Dipole - ANSWER Opposite charges separated by a short distance in a molecule or ion
Displace - ANSWER To replace an atom or ion in a compound in a chemical reaction eg chlorine
displaces iodine in sodium iodide
Displayed formula - ANSWER A chemical formula showing all the atoms in a compound and
their bonds
