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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",12,"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":427},"N5I2KgdggyCgaIWabU1iO9j6CRHgK5","q","Identify the element for which electronic configuration in +3 oxidation state is [Ar]3d⁵ :","ans",[415],3,"2021 - 1st September Evening Shift","course","chemistry","exp","Mn(25) = [Ar]3d⁵4s²\n

Mn⁺³ = [Ar]3d⁴4s⁰\n

Ru-belongs to 4d transition series\n

Co (27) = [Ar]3d⁷4s²\n

Co⁺³ = [Ar]3d⁶4s⁰\n

Fe(26) = [Ar]3d⁶4s²\n

Fe⁺³ = [Ar]3d⁵4s⁰","opts",[423,424,425,426],"Ru","Mn","Co","Fe",14,"14","initComment","initReply","actionData","errors"]

JEE MAIN - Chemistry (2021 - 1st September Evening Shift - No. 14)

Explanation

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