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Practicing real exam questions helps you understand the exam pattern, improve accuracy, and boost your JEE score. Perfect for students aiming for top ranks in IIT-JEE.","tags","jee main joint entrance examination india","version","vip","location",{"_391":392,"_393":394},"type","Point","coordinates",[395,396],79.0888,21.1466,"in","priority",11,"createdOn",1756744302186,"updatedOn","questionsCount",24748,"courseCount",9,"examKey","questionData",{"_369":410,"_411":412,"_413":414,"_278":416,"_417":418,"_263":370,"_419":420,"_421":422,"_110":406},"kPOt9VlkhgtcsBxiSiJNBpp0zDERFQ","q","The electronic configurations of bivalent\neuropium and trivalent cerium are
\n(atomic number : Xe = 54, Ce = 58, Eu = 63)","ans",[415],3,"2020 - 9th January Morning Slot","course","chemistry","exp","Eu²⁺ : [xe] 4f⁷\n

Ce³⁺ : [xe] 4f¹","opts",[423,424,425,426],"[Xe] 4f⁷ 6s² and [Xe] 4f² 6s²","[Xe] 4f² and [Xe] 4f⁷","[Xe] 4f⁴ and [Xe] 4f⁹","[Xe] 4f⁷ and [Xe] 4f¹","9","initComment","initReply","actionData","errors"]

JEE MAIN - Chemistry (2020 - 9th January Morning Slot - No. 9)

Explanation

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