PAPER 1 QUESTIONS WITH CORRECT
ANSWERS RATED A+ 2025/2026
Whatrarerallrsubstancesrmaderofr-rCORRECTrANSWERSratoms.
Whatrisranratom?r-rCORRECTrANSWERSrSmallestrpartrofranrelementrthatrcanrexist.
Whatrisranrelement?r-rCORRECTrANSWERSrArsubstancerthatronlyrcontainsronertyperofratom.
Howrmanyrelementsrarerthere?r-rCORRECTrANSWERSraboutr100.
Whererarerelementsrdisplayed?r-rCORRECTrANSWERSrInrtherperiodicrtable.
Howrarertheratomsrofreachrelementrrepresented?r-
rCORRECTrANSWERSrdifferentrchemicalrsymbols.
Whatrarermostrsubstances?r-rCORRECTrANSWERSrCompounds.
Whatrisrarcompound?r-rCORRECTrANSWERSr2rorrmorerelementsrchemicallyrcombined
Whatrdorscientistsruserchemicalrformulaertorshow?r-
rCORRECTrANSWERSrTherdifferentrelementsrinrarcompoundrandrhowrmanyratomsrofreachrelementr
onermoleculerofrthercompoundrcontains
Whatrisranrequation?r-rCORRECTrANSWERSrWhatrhappensrinrarchemicalrreaction.
, Whatrarertherreactants?r-
rCORRECTrANSWERSrthersubstancesrthatrreactrthereronrtherleftrhandrside.
Whatrarertherproducts?r-
rCORRECTrANSWERSrTherelementsrorrcompoundsrproducedrbyrarchemicalrreactionronrtherrightrha
ndrside
Whatrisrtherequationrwhenrmagnesiumrisrburnedrinroxygenrandrmagnesiumroxiderisrproduced?r-
rCORRECTrANSWERSrmagnesium+oxygen=magnesiumroxide.
Whatrarermixtures?r-
rCORRECTrANSWERSrSubstancesrcontainingrtwororrmorerdifferentrelementsrthatrarernotrchemically
rbondedrtogether
Whatrisrfiltration?r-rCORRECTrANSWERSrusedrtorseparatersolublersolidsrfromrinsolublersolids.
Whatrisrcrystallisation?r-
rCORRECTrANSWERSrArmethodrusedrtorpurifyrarsolublersolidrusingrarsaturatedrsolution
Whatrisrsimplerdistillation?r-rCORRECTrANSWERSrUsedrtorobtainrarsolventrfromrarsolution
Whatrisrfractionalrdistillation?r-
rCORRECTrANSWERSrusedrtorseparatermixturesrinrwhichrthercomponentsrhaverdifferentrboilingrpoi
nts.
Whatrisrchromotography?r-rCORRECTrANSWERSrArmethodrusedrtorseparaterarmixturerofrdyes
Whatrchargerdoratomsrhave?r-rCORRECTrANSWERSr0rneutral