GCSE AQA CHEMISTRY EXAM QUESTIONS
WITH CORRECT ANSWERS 2025
WhatBtypeBofBcompoundBisBcalciumBoxide?B
[1Bmark]B-BCORRECTBANSWERB-ABbase
DescribeBhowBtheBcalciumBatomBandBtheBoxygenBatomBformsBcalciumBoxide.BYouBshouldBgiveBtheBchargeBo
nBeachBionBformed.B
[4Bmarks]B-BCORRECTBANSWERB-calciumBlosesBelectronsBandBoxygenBgainsBelectronsB
twoBelectronsBareBtransferredB
calciumBhasBaB2+BchargeBoxideBhasBaB2-Bcharge
FigureB2BshowsBaBreactorBusedBtoBproduceBtitaniumBfromBtitanium(IV)Bchloride.
TheBproductBsodiumBchlorideBisBdissolvedBinBwaterBtoBseparateBitBfromBtitanium
SuggestBwhyBtheBreactionBisBdoneBinBanBatmosphereBofBdryBargonBinsteadBofBairBcontainingBwaterBvapour.B
[3Bmarks]B-BCORRECTBANSWERB-argonBisBunreactiveBwaterB
(vapour)BwouldBreactBwithBsodium
andBairBcontainsBoxygenBthatBwouldBreactBwithBreactants
ExplainBwhyBtitaniumBconductsBelectricity.
[3Bmarks]B-BCORRECTBANSWERB-
(titaniumBconductsBelectricity)BbecauseBelectronsBinBtheBouterBshellBofBtheBmetalBatomsBareBdelocalisedB
andBsoBelectronsBareBfreeBtoBmove
throughBtheBwholeBstructure
WhatBisBtheBapproximateBradiusBofBanBatom?B-BCORRECTBANSWERB-1B×B10^-10Bm
WITH CORRECT ANSWERS 2025
WhatBtypeBofBcompoundBisBcalciumBoxide?B
[1Bmark]B-BCORRECTBANSWERB-ABbase
DescribeBhowBtheBcalciumBatomBandBtheBoxygenBatomBformsBcalciumBoxide.BYouBshouldBgiveBtheBchargeBo
nBeachBionBformed.B
[4Bmarks]B-BCORRECTBANSWERB-calciumBlosesBelectronsBandBoxygenBgainsBelectronsB
twoBelectronsBareBtransferredB
calciumBhasBaB2+BchargeBoxideBhasBaB2-Bcharge
FigureB2BshowsBaBreactorBusedBtoBproduceBtitaniumBfromBtitanium(IV)Bchloride.
TheBproductBsodiumBchlorideBisBdissolvedBinBwaterBtoBseparateBitBfromBtitanium
SuggestBwhyBtheBreactionBisBdoneBinBanBatmosphereBofBdryBargonBinsteadBofBairBcontainingBwaterBvapour.B
[3Bmarks]B-BCORRECTBANSWERB-argonBisBunreactiveBwaterB
(vapour)BwouldBreactBwithBsodium
andBairBcontainsBoxygenBthatBwouldBreactBwithBreactants
ExplainBwhyBtitaniumBconductsBelectricity.
[3Bmarks]B-BCORRECTBANSWERB-
(titaniumBconductsBelectricity)BbecauseBelectronsBinBtheBouterBshellBofBtheBmetalBatomsBareBdelocalisedB
andBsoBelectronsBareBfreeBtoBmove
throughBtheBwholeBstructure
WhatBisBtheBapproximateBradiusBofBanBatom?B-BCORRECTBANSWERB-1B×B10^-10Bm