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It assesses knowledge in subjects relevant to the candidate’s chosen course of study.","tags","utme jamb joint admission matriculation board unified tertiary matriculation examination nigeria africa","version","vip","location",{"_390":391,"_392":393},"type","Point","coordinates",[394,395],9.082,10.3671,"ng","priority",19,"createdOn",1755987353430,"updatedOn","questionsCount",29915,"courseCount",20,"examKey","questionData",{"_369":409,"_410":411,"_412":413,"_278":415,"_416":417,"_263":370,"_418":419,"_420":421,"_110":426},"To6jauIkkU1Inw4q5cI6plBeZ4ntao","q","50 cm³ of carbon (II) oxide was exploded with 150 cm³ of air containing 20% oxygen by volume. Which of the reactants was in excess?","ans",[414],2,"2000","course","chemistry","exp","2CO + O₂ → 2CO₂
\n50cm³ → 25cm³
\n20% * 150 = 30cm³
\n30 cm³ is the volume of oxygen available for the reactions. But only 25 cm³ is required; therefore O₂ is in excess","opts",[422,423,424,425],"Carbon (II) oxide","Carbon (IV) oxide","Oxygen","Nitrogen",4,"4","initComment","initReply","actionData","errors"]

JAMB - Chemistry (2000 - No. 4)

Explanation

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