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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":424},"GECoYTgZsrNuaQRakYQg6XKj3Ymgaf","q","In the redox reaction represented by the following equation: Cu^{2+_aq + Zn_(s) → Cu_(s) + Zn²⁺\n}","ans",[414],1,"1991","course","chemistry","opts",[420,421,422,423],"the oxidation number of copper increases","copper (ll) ions are reduced to copper atoms","zinc atoms are reduced to zinc ions","copper (ll) ions donate electrons to zinc atoms",21,"21","initComment","initReply","actionData","errors"]

WAEC - Chemistry (1991 - No. 21)

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