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These resources are designed to help you familiarize yourself with the exam format, identify key topics, and practice effectively. Whether you're preparing for the May/June or GCE sessions, our curated materials provide both objective and theory questions to enhance your study sessions.","tags","waec nigeria west africa examination council","version","vip","location",{"_390":391,"_392":393},"type","Point","coordinates",[394,395],9.082,10.3671,"ng","priority",10,"createdOn",1755991949910,"updatedOn","questionsCount",27220,"courseCount",23,"examKey","questionData",{"_369":409,"_410":411,"_412":413,"_278":415,"_416":417,"_263":370,"_418":419,"_110":424},"dhdo2Divva2odeeJPFLY26Hm3aEv2r","q","What is the change in oxidation number of manganes in the reaction represented by the following equation? MnO^-_4(aq) + 8H⁺_(aq) + 5e^- → Mn²⁺_(aq) + 4H₂O_(l)","ans",[414],3,"2010","course","chemistry","opts",[420,421,422,423],"+3 to + 2","+ 4 to + 2","+ 5 to + 2","+ 7 to 2",28,"28","initComment","initReply","actionData","errors"]

WAEC - Chemistry (2010 - No. 28)

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