AQA A LEVEL Chemistry Questions with
Complete Solutions
Oxidising agent for oxidation of alcohols Acidified potassium dichromate
Orange (Cr2O7 2-) to green(Cr 3+)
What happens when an unsymmetrical alcohol undergoes and elimination reaction A mixture
of isomeric products are produced
Biofuel Any fuel made from living organisms or their waste
Carbon neutral No net annual emissions of carbon dioxide into the atmosphere
Line with largest m/z ratio on a mass spectrum of a compound Molecular ion (a molecule
which had lost an electron)
,High resolution spectrometry Used to distinguish between compounds and can measure
relative atomic masses to 4 decimal places
Finger print region The area of the spectrum below the 1500cm-1, it is unique to the molecule
Molecular formula The actual number of stones of each element imma compound
Functional group isomer Compounds with the same molecular formula but different
functional group
Positional isomer Isomers with the same carbon chain and the same functional group but
attached at different points of the carbon chain
Specific heat capacity Energy required to raise the temperature of 1g of a substance by 1
degrees
Solvents used for nmr CCL4, CDCL3
, Do not cause peak on h nmr but causes known peak on carbon nmr
Carboxylic acid + carbonates Salt, carbon dioxide + water
Carboxylic acid + alcohol Ester + water
Uses for esters Food colouring, perfumes, solvents and plasticisers
Uses for sulfur dioxide Bleach, food preservatives
Acid hydrolysis of esters Acid and alcohol
Base hydrolysis of esters Carboxylate ion and alcohol
Hydrolysis of oils and fats using NaOH Glycerol, soap (salt if long chain carboxylic acid)
How are biodiesel made Reacting vegetable oils with methanol and KOH
Complete Solutions
Oxidising agent for oxidation of alcohols Acidified potassium dichromate
Orange (Cr2O7 2-) to green(Cr 3+)
What happens when an unsymmetrical alcohol undergoes and elimination reaction A mixture
of isomeric products are produced
Biofuel Any fuel made from living organisms or their waste
Carbon neutral No net annual emissions of carbon dioxide into the atmosphere
Line with largest m/z ratio on a mass spectrum of a compound Molecular ion (a molecule
which had lost an electron)
,High resolution spectrometry Used to distinguish between compounds and can measure
relative atomic masses to 4 decimal places
Finger print region The area of the spectrum below the 1500cm-1, it is unique to the molecule
Molecular formula The actual number of stones of each element imma compound
Functional group isomer Compounds with the same molecular formula but different
functional group
Positional isomer Isomers with the same carbon chain and the same functional group but
attached at different points of the carbon chain
Specific heat capacity Energy required to raise the temperature of 1g of a substance by 1
degrees
Solvents used for nmr CCL4, CDCL3
, Do not cause peak on h nmr but causes known peak on carbon nmr
Carboxylic acid + carbonates Salt, carbon dioxide + water
Carboxylic acid + alcohol Ester + water
Uses for esters Food colouring, perfumes, solvents and plasticisers
Uses for sulfur dioxide Bleach, food preservatives
Acid hydrolysis of esters Acid and alcohol
Base hydrolysis of esters Carboxylate ion and alcohol
Hydrolysis of oils and fats using NaOH Glycerol, soap (salt if long chain carboxylic acid)
How are biodiesel made Reacting vegetable oils with methanol and KOH
