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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":425},"H9TnGfjA49EzYI1ntPJN7iv3VKfi0M","q","In which of the following is the oxidation number of nitrogen zero?","ans",[414],4,"1991","course","chemistry","opts",[420,421,422,423,424],"SO₂ and NH₃","NaNO₃","HNO₂","NOI₃","N₂",2,"2","initComment","initReply","actionData","errors"]

WAEC - Chemistry (1991 - No. 2)

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