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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},"NQRX7lvpFWOvYiUw8P1ds2qM85nwUw","q","The reddish–brown rust on iron roofing sheets consists of","ans",[414],2,"2017","course","chemistry","exp","Iron [Fe] reacts with H2 in the presence of oxygen to form a rust.
\n
\n4Fe + 3O2 → 2 Fe2O2
\n
\nFe2O3 + H2O → Fe2O3.H2O","opts",[422,423,424,425],"Fe³ + (H₂O)₆","FeO.H₂O","Fe₂O₃.XH₂O","Fe₃O₄.2H2₂O",34,"34","initComment","initReply","actionData","errors"]

JAMB - Chemistry (2017 - No. 34)

Explanation

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