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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",18,"createdOn",1755991949910,"updatedOn","questionsCount",27220,"courseCount",23,"examKey","questionData",{"_369":409,"_410":411,"_412":413,"_278":415,"_416":417,"_263":370,"_418":419,"_110":405},"i8dsP9BL30Kq4LrFS4f8Os9kwf2O91","q","When the trioxonitrate (IV) salt of an alkali metal Y is heated, the formula of the residue is","ans",[414],1,"1993","course","chemistry","opts",[420,421,422,423,424],"Y₂O","YNO₂","Y₂O₃","Y (NO₂)₂","YO₂","23","initComment","initReply","actionData","errors"]

WAEC - Chemistry (1993 - No. 23)

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