JEE Main 2020 — Coordination Compounds Question with Solution
From: JEE Main 2020 (Online) 7th January Evening Slot
Question
Among the statements(a)-(d) the incorrect ones are :
(a) Octahedral CO(III) complexes with strong fields ligands have very high magnetic moments.
(b) When 0 < P, the d-electron configuration of Co(III) in an octahedral complex is
(c) Wavelength of light absorbed by [Co(en)3]3+ is lower than that of [CoF6]3-
(d) If the 0 for an octahedral complex of CO(III) is 18,000 cm-1, the t for its tetrahedral complex with the same ligand be 16,000 cm-1
(a) Octahedral CO(III) complexes with strong fields ligands have very high magnetic moments.
(b) When 0 < P, the d-electron configuration of Co(III) in an octahedral complex is
(c) Wavelength of light absorbed by [Co(en)3]3+ is lower than that of [CoF6]3-
(d) If the 0 for an octahedral complex of CO(III) is 18,000 cm-1, the t for its tetrahedral complex with the same ligand be 16,000 cm-1
Choose an option
Show full solutionCorrect option: D
Correct answer
D(a) and (d) only
Step-by-step explanation
(a) Co3+ with strong field complex forms low
magnetic moment complex.
(b) If 0 < P configuration of Co3+ will be .
(c) Splitting power of ethylenediamine (en) is greater than fluoride (F–) ligand therefore more energy absorbed by [Co(en)3]3+ as compared to [CoF6]3–.
So wave length of light absorbed by [Co(en)3]3+ is lower than that of [CoF6]3–
(d) = = 8000 cm-1
Statement (a) and (d) are incorrect.
(b) If 0 < P configuration of Co3+ will be .
(c) Splitting power of ethylenediamine (en) is greater than fluoride (F–) ligand therefore more energy absorbed by [Co(en)3]3+ as compared to [CoF6]3–.
So wave length of light absorbed by [Co(en)3]3+ is lower than that of [CoF6]3–
(d) = = 8000 cm-1
Statement (a) and (d) are incorrect.
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