Which one of the following lanthanides exhibits +2 oxidation state with diamagnetic nature. (Given Z for Nd = 60, Yb = 70, La = 57, Ce = 58) fuEufyf[kr ysUFksuk;Mksa eas ls dkSu lk ,d izfrpqEcdh; izÑf

Question

Which one of the following lanthanides exhibits +2 oxidation state with diamagnetic nature. (Given Z for Nd = 60, Yb = 70, La = 57, Ce = 58) fuEufyf[kr ysUFksuk;Mksa eas ls dkSu lk ,d izfrpqEcdh; izÑfr dh +2 vkWDlhdj.k voLFkk n'kkZrk gS \ (fn;k gS % Z Nd = 60, Yb = 70, La = 57, Ce = 58)

(A) Yb
(B) La
(C) Nd
(D) Ce

Prashant Kotian · Accepted Answer

Correct answer: A. La2+ (Z = 57) = 5d1 Ce2+ (Z = 58) = 4f2 Nd2+ (Z = 60) = 4f4 Yb2+ (Z = 70) = 4f14 Yb2+ Contain no unpaired electron. So it is diamagnetic and Colourless.

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