JEE Main 2022 — d and f Block Elements Question with Solution
JEE Main 2022 (27 Jun Shift 1)
Question
The number of statement(s) correct from the following for Copper is/are
(A) complexes are always paramagnetic
(B) complexes are generally colourless
(C) is easily oxidized
(D) In Fehling solution, the active reagent has
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Show full solutionCorrect answer: 3
Step-by-step explanation
have fulfilled d-subshell and does not have any unpaired electrons so, its complexes will be colourless mostly. and it will be diamagnetic. But has one unpaired electron, so, it will be paramagnetic.
are correct and is incorrect because Fehling solution has
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This is a previous-year question from JEE Main 2022, covering the d and f Block Elements chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.