The number of statement(s) correct from the following for Copper is/are
(A) $Cu (II)$ complexes are always paramagnetic
(B) $Cu (I)$ complexes are generally colourless
(C) $Cu (I)$ is easily oxidized
(D) In Fehling solution, the active reagent has $Cu (I)$

Question

The number of statement(s) correct from the following for Copper is/are

(A) $Cu (II)$ complexes are always paramagnetic

(B) $Cu (I)$ complexes are generally colourless

(C) $Cu (I)$ is easily oxidized

(D) In Fehling solution, the active reagent has $Cu (I)$

TestHub · Accepted Answer

Cu ( I ) have fulfilled d-subshell and does not have any unpaired electrons so, its complexes will be colourless mostly. and it will be diamagnetic. But Cu ( II ) has one unpaired electron, so, it will be paramagnetic. A , B , C are correct and D is incorrect because Fehling solution has Cu II

Chemistry - Complete d-block Question with Solution | TestHub

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