AQA A LEVEL JUNE 2025
CHEMISTRY 7405/ 2 PAPER
2 QUESTION PAPER
How do you name amines? - ANSWER-amine or amino-
Is phenylamine soluble? - ANSWERNot very because of non-polarity of benzene ring cannot form
hydrogen bonds
How could you regenerate a soluble amine from the ammonium salt? - ANSWERAdd strong base such as
NaOH
, What inductive effect do alkyl groups have? - ANSWERPositive - increase electron density around N to
make it a stronger base
What inductive effect do aryl groups have? - ANSWERNegative - decrease electron density around N to
make it a weaker base
What are tertiary amines never good bases? - ANSWERInsoluble in water
How would you maximise yield of primary amine? - ANSWERExcess ammonia
Why is benzene not used in schools? - ANSWERIts a carcinogen
How do youn name compounds contating a benzene ring? - ANSWERPhenyl- or -benzene
How do subtsituents with a positive inductive effect (alkyl groups) affect further substitution? -
ANSWERRelease electrons into ring making substitutions to 2,4,6 More likely
How do subtsituents with a negative inductive effect (NH2) affect further substitution? -
ANSWERRemove electrons from ring making reactions slower and directing subtsituents to 3,5
What catalyst is needed for formation of esters from alcohols and carboxylic acids? (and hydrolysis) -
ANSWERConc H2SO4
What are the conditions for making glycerol? - ANSWERNaOH and 60°C
When purifying by recrystallisation, why is the minimum volume of hot solvent used? - ANSWERSo that
saturated solution is created - as many crystals will fall out of solution as possible when cooled
Why is the solution filtered hot when purifying by recrystallisation? - ANSWERTo remove insoluble
impurities
CHEMISTRY 7405/ 2 PAPER
2 QUESTION PAPER
How do you name amines? - ANSWER-amine or amino-
Is phenylamine soluble? - ANSWERNot very because of non-polarity of benzene ring cannot form
hydrogen bonds
How could you regenerate a soluble amine from the ammonium salt? - ANSWERAdd strong base such as
NaOH
, What inductive effect do alkyl groups have? - ANSWERPositive - increase electron density around N to
make it a stronger base
What inductive effect do aryl groups have? - ANSWERNegative - decrease electron density around N to
make it a weaker base
What are tertiary amines never good bases? - ANSWERInsoluble in water
How would you maximise yield of primary amine? - ANSWERExcess ammonia
Why is benzene not used in schools? - ANSWERIts a carcinogen
How do youn name compounds contating a benzene ring? - ANSWERPhenyl- or -benzene
How do subtsituents with a positive inductive effect (alkyl groups) affect further substitution? -
ANSWERRelease electrons into ring making substitutions to 2,4,6 More likely
How do subtsituents with a negative inductive effect (NH2) affect further substitution? -
ANSWERRemove electrons from ring making reactions slower and directing subtsituents to 3,5
What catalyst is needed for formation of esters from alcohols and carboxylic acids? (and hydrolysis) -
ANSWERConc H2SO4
What are the conditions for making glycerol? - ANSWERNaOH and 60°C
When purifying by recrystallisation, why is the minimum volume of hot solvent used? - ANSWERSo that
saturated solution is created - as many crystals will fall out of solution as possible when cooled
Why is the solution filtered hot when purifying by recrystallisation? - ANSWERTo remove insoluble
impurities
