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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,"_420":421,"_110":426},"DDTeSi6OQiw6S4CXKvXhlTKH228uWK","q","The oxidation number of iodine in the iodate ion (IO ^-₃) is","ans",[414],3,"2006","course","chemistry","exp","1O₃
\n[oxidation number of 1] + [oxidation number of 0] x 3 = -1
\nx + -2 x 3 = 1
\nx - 6 = - 1
\nx = - 1 + 6 = +5","opts",[422,423,424,425],"-5","-1","+1","+5",15,"15","initComment","initReply","actionData","errors"]

WAEC - Chemistry (2006 - No. 15)

Explanation

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