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OCR A-Level Chemistry Questions &
100% Correct Answers- Latest Test |
Graded A+ | Passed
Acid
֎ -:- A species that releases H+ ions in aqueous solution
Acid Dissociation Constant Ka
֎ -:- The equilibrium constant that shows the extent of dissociation of a weak
acid
Acid-Base Pair
֎ -:- A pair of two species that transform into each other by gain or loss of a
proton
Activation Energy
֎ -:- The minimum energy required to start a reaction by the breaking of bonds
Actual Yield
֎ -:- The amount of product obtained from a reaction
Addition Polymerisation
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֎ -:- Formation of a very long molecular chain, by repeated addition reactions of
many unsaturated alkene molecules (monomers).
Addition Reaction
֎ -:- A reaction in which a reactant is added to an unsaturated molecule to make
a one saturated molecule
Adsorption
֎ -:- The process that occurs when a gas or liquid or solute is held to the surface
of a solid.
Alicyclic
֎ -:- Containing carbon atoms joined together in a ring that is not aromatic
Aliphatic
֎ -:- Containing carbon atoms joined together in straight or branched chains.
Alkali
֎ -:- A type of base that dissolves in water forming hydroxide ions, OH- (aq)
ions.
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Alkanes
֎ -:- The hydrocarbon homologous series with single carbon-to-carbon bonds
and the general formula: CnH2n+2.
Alkenes
֎ -:- The hydrocarbon homologous series with at one double carbon-to-carbon
bonds and the general formula: CnH2n.
Alkyl Group
֎ -:- A side chain formed by removing a hydrogen atom removed from an
alkane parent chain, for example, CH3, C2H5; any alkyl group is often shown
as R.
Alkynes
֎ -:- The hydrocarbon homologous series with one triple carbon-to-carbon
bonds and the general formula: CnH2n-2.
Amount of Substance
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֎ -:- The quantity whose unit of the mole, used as a means of counting any
species such as atoms, ions and molecules.
Anhydrous
֎ -:- Containing no water molecules
Anion
֎ -:- A negatively charged ion with more electrons than protons
Aromatic
֎ -:- Containing one or more benzene rings
Atom Economy
֎ -:- ((sum of molar masses of desired products)/(sum of molar masses of all
products)) x 100%.
Atomic (Proton) Number
֎ -:- The number of protons in the nucleus of an atom
Atomic Orbital
26/08/2024 | © Copyright- This work may not be copied for profit.
OCR A-Level Chemistry Questions &
100% Correct Answers- Latest Test |
Graded A+ | Passed
Acid
֎ -:- A species that releases H+ ions in aqueous solution
Acid Dissociation Constant Ka
֎ -:- The equilibrium constant that shows the extent of dissociation of a weak
acid
Acid-Base Pair
֎ -:- A pair of two species that transform into each other by gain or loss of a
proton
Activation Energy
֎ -:- The minimum energy required to start a reaction by the breaking of bonds
Actual Yield
֎ -:- The amount of product obtained from a reaction
Addition Polymerisation
26/08/2024 | © Copyright- This work may not be copied for profit.
, Excellence is key | 2024/2025 ~Page |2
֎ -:- Formation of a very long molecular chain, by repeated addition reactions of
many unsaturated alkene molecules (monomers).
Addition Reaction
֎ -:- A reaction in which a reactant is added to an unsaturated molecule to make
a one saturated molecule
Adsorption
֎ -:- The process that occurs when a gas or liquid or solute is held to the surface
of a solid.
Alicyclic
֎ -:- Containing carbon atoms joined together in a ring that is not aromatic
Aliphatic
֎ -:- Containing carbon atoms joined together in straight or branched chains.
Alkali
֎ -:- A type of base that dissolves in water forming hydroxide ions, OH- (aq)
ions.
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, Excellence is key | 2024/2025 ~Page |3
Alkanes
֎ -:- The hydrocarbon homologous series with single carbon-to-carbon bonds
and the general formula: CnH2n+2.
Alkenes
֎ -:- The hydrocarbon homologous series with at one double carbon-to-carbon
bonds and the general formula: CnH2n.
Alkyl Group
֎ -:- A side chain formed by removing a hydrogen atom removed from an
alkane parent chain, for example, CH3, C2H5; any alkyl group is often shown
as R.
Alkynes
֎ -:- The hydrocarbon homologous series with one triple carbon-to-carbon
bonds and the general formula: CnH2n-2.
Amount of Substance
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֎ -:- The quantity whose unit of the mole, used as a means of counting any
species such as atoms, ions and molecules.
Anhydrous
֎ -:- Containing no water molecules
Anion
֎ -:- A negatively charged ion with more electrons than protons
Aromatic
֎ -:- Containing one or more benzene rings
Atom Economy
֎ -:- ((sum of molar masses of desired products)/(sum of molar masses of all
products)) x 100%.
Atomic (Proton) Number
֎ -:- The number of protons in the nucleus of an atom
Atomic Orbital
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