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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 is a proton donor. activation energy ֎ -:- The minimum amount of kinetic energy that particles need to have in order to react when they collide addition polymer ֎ -:- A very long molecular chain formed by repeated addition reactions of many unsaturated alkene m...

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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 is a proton donor.




activation energy


֎ -:- The minimum amount of kinetic energy that particles need to have in order

to react when they collide




addition polymer


֎ -:- A very long molecular chain formed by repeated addition reactions of

many unsaturated alkene molecules (monomers).




addition polymerisation


֎ -:- The process in which unsaturated alkene molecules (monomers) add on to

a growing polymer chain one at a time to form a very long saturated molecular

chain (the addition polymer).




addition reaction




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

, Excellence is key | 2024/2025 ~Page |2


֎ -:- A reaction in which a reactant is added to an unsaturated molecule to make

a saturated molecule.




adsorption


֎ -:- The process that occurs when a gas, liquid or solute is held to the surface of

a solid or, more rarely, a liquid.




alicyclic hydrocarbon


֎ -:- A hydrocarbon with carbon atoms joined together in a ring structure.




aliphatic hydrocarbon


֎ -:- A hydrocarbon with carbon atoms joined together in straight or branched

chains.




alkali


֎ -:- A type of base that dissolves in water forming hydroxide ions, OH- (aq)

ions.




alkanes


֎ -:- The homologous series with the general formula: CnH2n+2.




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

, Excellence is key | 2024/2025 ~Page |3


alkyl group


֎ -:- An alkane with a hydrogen atom removed, e.g. CH3, C2H5; alkyl groups are

often shown as 'R'.




amount of substance


֎ -:- The quantity whose unit of the mole. Chemists use 'amount of substance'

as a means of counting atoms.




anhydrous


֎ -:- A substance that contains no water molecules.




anion


֎ -:- A negatively charged ion.




atom economy


֎ -:- atom economy = molecular mass of the desired product ×100 sum of

molecular masses of all products




atomic orbital




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

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


֎ -:- A region within an atom that can hold up to two electrons, with opposite

spins.




atomic (proton) number


֎ -:- The number of protons in the nucleus of an atom




acid


֎ -:- A species that is a proton donor.




activation energy


֎ -:- The minimum energy required to start a reaction by the breaking of bonds.




addition polymer


֎ -:- A very long molecular chain formed by repeated addition reactions of

many unsaturated alkene molecules (monomers).




addition polymerisation


֎ -:- The process in which unsaturated alkene molecules (monomers) add on to

a growing polymer chain one at a time to form a very long saturated molecular

chain (the addition polymer).




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

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