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OCR A-Level Chemistry Questions & 100% Correct Answers- Latest Test | Graded A+ | Passed
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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 Activat...

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  • August 27, 2024
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  • 2024/2025
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Excellence is key | 2024/2025 ~Page |1



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.




26/08/2024 | © Copyright- This work may not be copied for profit.

, 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




26/08/2024 | © Copyright- This work may not be copied for profit.

, Excellence is key | 2024/2025 ~Page |4


֎ -:- 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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