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A LEVEL CHEMISTRY EXAM WITH COMPLETE SOLUTIONS  

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A LEVEL CHEMISTRY EXAM WITH COMPLETE SOLUTIONS

 

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.

 

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 - 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 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 - 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 - answerA hydrocarbon with carbon atoms joined together in straight or branched chains.

 

 

acid - answerA species that is a proton donor.

 

activation energy - answerThe minimum energy required to start a reaction by the breaking of bonds.

 

addition polymer - answerA very long molecular chain formed by repeated addition reactions of many unsaturated alkene molecules (monomers).

 

addition polymerisation - answerThe 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 - answerA reaction in which a reactant is added to an unsaturated molecule to make a saturated molecule.

 

adsorption - answerThe process that occurs when a gas, liquid or solute is held to the surface of a solid or, more rarely, a liquid.

 

alicyclic hydrocarbon - answerA hydrocarbon with carbon atoms joined together in a ring structure.

 

aliphatic hydrocarbon - answerA hydrocarbon with carbon atoms joined together in straight or branched chains.

 

alkali - answerA type of base that dissolves in water forming hydroxide ions, OH- (aq) ions.

 

alkanes - answerThe homologous series with the general formula: CnH2n+2.

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[Solved] A LEVEL CHEMISTRY EXAM WITH COMPLETE SOLUTIONS  

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A LEVEL CHEMISTRY EXAM WITH COMPLETE SOLUTIONS 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. 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 - A region within an atom that can hold up to two electrons, with ...
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