AQA GCSE CHEMISTRY PAPER 2 QUESTIONS WITH CRRECT ANSWERS 2025

AQA GCSE CHEMISTRY PAPER 2
QUESTIONS WITH CRRECT ANSWERS 2025
HowNdoNyouNmeasureNtheNrateNofNaNreaction?N-NCORRECTNANSWERN-
ByNmeasuringNtheNquantityNofNaNreactantNusedNorNtheNquantityNofNproductNformedNoverNtime



WhatNisNtheNequationNforNcalculatingNtheNmeanNrateNofNaNreactionNbyNmeasuringNtheNamountNofNreactantN
used?N-NCORRECTNANSWERN-MeanNrateNofNreactionN=NquantityNofNreactantNused/timeNtaken



WhatNisNtheNequationNforNcalculatingNtheNmeanNrateNofNaNreactionNbyNmeasuringNtheNamountNofNproductN
formed?N-NCORRECTNANSWERN-MeanNrateNofNreactionN=NquantityNofNproductNformed/timeNtaken



WhatNunitsNcanNyouNmeasureNtheNrateNofNaNreactionNin?N-NCORRECTNANSWERN-g/sNorNcm3/sNorNmol/s



HowNdoNyouNcalculateNtheNrateNofNaNreactionNatNaNspecificNtimeNfromNgraphNofNtheNquantityNofNreactantNu
sedNorNtheNquantityNofNproductNformed?N-NCORRECTNANSWERN-
ByNmeasuringNtheNgradientNofNaNtangentNdrawnNatNthatNspecificNtimeNonNtheNgraph



WhatNareNtheNfiveNfactorsNthatNcanNaffectNtheNrateNofNaNreaction?N-NCORRECTNANSWERN-
ConcentrationNofNreactantsNinNsolution,NpressureNofNreactingNgases,NsurfaceNareaNofNsolidNreactants,Ntemp
eratureNandNtheNpresenceNofNaNcatalyst



WhatNtheoryNcanNweNuseNtoNexplainNhowNvariousNfactorsNaffectNtheNrateNofNaNreaction?N-
NCORRECTNANSWERN-CollisionNtheory




WhatNisNcollisionNtheory?N-NCORRECTNANSWERN-
ChemicalNreactionsNcanNoccurNonlyNwhenNreactingNparticlesNcollideNwithNeachNotherNandNwithNsufficientNe
nergy



WhatNisNtheNactivationNenergyNofNaNreaction?N-NCORRECTNANSWERN-
TheNminimumNamountNofNenergyNthatNparticlesNmustNhaveNtoNreact

,AccordingNtoNcollisionNtheoryNwhyNdoesNincreasingNconcentrationNofNreactantNinNsolutionNincreaseNtheNrat
eNofNtheNreaction?N-NCORRECTNANSWERN-
ItNincreasesNtheNfrequencyNofNcollisionsNandNsoNincreasesNtheNrateNofNreaction



AccordingNtoNcollisionNtheoryNwhyNdoesNincreasingNtheNpressureNofNreactingNgasesNincreaseNtheNrateNofNth
eNreaction?N-NCORRECTNANSWERN-
ItNincreasesNtheNfrequencyNofNcollisionsNandNsoNincreasesNtheNrateNofNreaction



AccordingNtoNcollisionNtheoryNwhyNdoesNincreasingNtheNsurfaceNareaNofNsolidNreactantsNinNsolutionNincreas
eNtheNrateNofNtheNreaction?N-NCORRECTNANSWERN-
ItNincreasesNtheNfrequencyNofNcollisionsNandNsoNincreasesNtheNrateNofNreaction



AccordingNtoNcollisionNtheoryNwhyNdoesNincreasingNtemperatureNincreaseNtheNrateNofNtheNreaction?N-
NCORRECTNANSWERN-

ItNincreasesNtheNfrequencyNofNcollisionsNandNmakesNtheNcollisionNmoreNenergeticNandNsoNincreasesNtheNrat
eNofNreaction



HowNdoNyouNincreaseNtheNsurfaceNareaNofNaNsolidNreactant?N-NCORRECTNANSWERN-
GrindNitNintoNaNpowderNthatNhasNsmallerNparticleNsize



WhatNeffectNdoesNincreasingNtheNtemperatureNofNaNreactionNbyN10°CNhaveNonNtheNrateNofNaNreaction?N-
NCORRECTNANSWERN-ItNdoublesNit




WhatNisNaNcatalyst?N-NCORRECTNANSWERN-
ANchemicalNthatNchangesNtheNrateNofNaNchemicalNreactionNbutNisNnotNusedNupNinNtheNreaction



HowNdoNcatalystsNincreaseNtheNrateNofNaNreaction?N-NCORRECTNANSWERN-
ByNprovidingNaNdifferentNpathwayNforNtheNreactionNthatNhasNaNlowerNactivationNenergy



HowNdoNyouNknowNinNaNreactionNthatNaNchemicalNisNusedNinNaNreactionNisNaNcatalyst?N-
NCORRECTNANSWERN-ItNisNnotNincludedNinNtheNchemicalNequationNforNtheNreaction




WhatNisNaNreversibleNreaction?N-NCORRECTNANSWERN-
WhereNtheNproductsNofNaNchemicalNreactionNcanNreactNtoNproduceNtheNoriginalNreactants

, WhatNisNtheNsymbolNusedNinNreversibleNreactionNequationsNthatNshowsNthatNtheNreactionNisNreversible?N-
NCORRECTNANSWERN-




HowNcanNyouNchangeNtheNdirectionNofNaNreversibleNreaction?N-NCORRECTNANSWERN-
ByNchangingNtheNconditions;NforNexampleNheatingNorNcoolingNtheNreaction



DescribeNtheNenergyNchangesNinNaNreversibleNreactionN-NCORRECTNANSWERN-
OneNdirectionNwillNbeNexothermicNandNtheNotherNdirectionNendothermic



WhenNisNequilibriumNinNaNreversibleNreactionNachievedNinNapparatusNwhichNpreventsNtheNescapeNofNreact
antsNandNproducts?N-NCORRECTNANSWERN-
WhenNtheNrateNofNtheNforwardNandNreverseNreactionsNoccurNatNexactlyNtheNsameNrate



WhatNaffectsNtheNrelativeNamountNofNallNtheNreactantsNandNproductsNatNequilibriumNinNaNreversibleNreacti
on?N-NCORRECTNANSWERN-TheNconditions



WhatNhappensNtoNanNequilibriumNifNanyNofNtheNconditionsNchange?N-NCORRECTNANSWERN-
TheNsystemNrespondsNtoNcounteractNtheNchange



WhatNdoesNLeNChatelier'sNprincipleNpredict?N-NCORRECTNANSWERN-
TheNeffectsNofNchangingNconditionsNonNaNsystemNatNequilibrium



WhatNaffectNwillNchangingNtheNconcentrationNofNoneNofNtheNreactantsNinNaNreversibleNreactionNhaveNonNth
eNequilibrium?N-NCORRECTNANSWERN-
TheNsystemNwillNnoNlongerNbeNinNequilibriumNandNtheNconcentrationNofNallNtheNsubstancesNwillNchangeNun
tilNequilibriumNisNreachedNagain



WhatNhappensNwhenNtheNconcentrationNofNaNreactantNisNincreasedNinNaNreversibleNreaction?N-
NCORRECTNANSWERN-MoreNproductsNwillNbeNformedNuntilNequilibriumNisNreachedNagain




WhatNhappensNwhenNtheNconcentrationNofNaNproductNisNdecreasedNinNaNreversibleNreaction?N-
NCORRECTNANSWERN-MoreNreactantNwillNreactNuntilNequilibriumNisNreachedNagain