Which of the following is diamagnetic?
- $[Fe(CN)_6]^{3-}$
\(Co(O_x)_3]^{3-}\)
- $[FeF_6]^{3-}$
- $[CoF_6]^{3-}$
The Correct Option is B
Solution and Explanation
\([Fe(CN)_6]^{3-}\) has magnetic moment of a single unpaired electron whereas \([FeF_6]^{3-}\) has a magnetic moment of five unpaired electrons.
\([CoF_6]^{3-}\) is paramagnetic with four unpaired electrons while \([Co(C_2O_4)_3]^3\) is diamagnetic. This anomaly is explained by valence bond theory in terms of formation of inner and outer orbital coordination entities. \([Co(C_2O_4)_3]^{3-}\) is an inner orbital complexes having \(d^2sp^3\) hybridization.
So, the correct option is (B): \(Co(O_x)_3]^{3-}\)
Top Questions on coordination compounds
- Identify correct statements from below:
A. The chromate ion is square planar.
B. Dichromates are generally prepared from chromates.
C. The green manganate ion is diamagnetic.
D. Dark green coloured \(K_2MnO_4\) disproportionates in a neutral or acidic medium to give permanganate.
E. With increasing oxidation number of transition metal, ionic character of the oxides decreases.
Choose the correct answer from the options given below:- JEE Main - 2024
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Match the following:
Ions Properties I. Zn2+ i. d8 configuration II. Cu2+ ii. Colourless III. Ni2+ iii. µ = 1.73 BM Codes:
- KCET - 2024
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- On treating 100 mL of 0.1 M aqueous solution of the complex CrCl₃.6H₂O with excess of AgNO₃, 2.86 g of AgCl was obtained. The complex is:
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- The complex compounds [Co(NH₃)₅SO₄]Br and [Co(NH₃)₅Br]SO₄ are:
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- Which of the following statements are true about [CoF6]3− ion?
I) The complex has octahedral geometry.
II) Coordination number of Co is 3 and oxidation state is +6.
(III) The complex is sp3d2 hybridised.
(IV) It is a high spin complex.- KCET - 2024
- Chemistry
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Questions Asked in JEE Main exam
- 0.08 kg of air is heated at constant volume through 5°C. The specific heat of air at constant volume is 0.17 kcal/kg°C and \( J = 4.18 \) joule/cal. The change in its internal energy is approximately:
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- \(^{n-1}C_r = (k^2 - 8) ^{n}C_{r+1}\) if and only if:
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- If in a G.P. of64terms, the sum of all the terms is 7 times the sum of the odd terms of the G.P., then the common ratio of the G.P. is equal to:
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- Geometric Progression
- Match List-I with List-II
\[ \begin{array}{|c|c|} \hline \text{List-I (Species)} & \text{List-II (Electronic distribution)} \\ \hline \text{(A) Cr}^{+2} & \text{(I) } 3d^8 \\ \text{(B) Mn}^{+} & \text{(II) } 3d^3 4s^1 \\ \text{(C) Ni}^{+2} & \text{(III) } 3d^4 \\ \text{(D) V}^{+} & \text{(IV) } 3d^5 4s^1 \\ \hline \end{array} \]- JEE Main - 2024
- d And f - Block Elements
- Two thermodynamical processes are shown in the figure. The molar heat capacity for process \( A \) and \( B \) are \( C_A \) and \( C_B \). The molar heat capacity at constant pressure and constant volume are represented by \( C_P \) and \( C_V \), respectively. Choose the correct statement.
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Concepts Used:
Coordination Compounds
A coordination compound holds a central metal atom or ion surrounded by various oppositely charged ions or neutral molecules. These molecules or ions are re-bonded to the metal atom or ion by a coordinate bond.
Coordination entity:
A coordination entity composes of a central metal atom or ion bonded to a fixed number of ions or molecules.
Ligands:
A molecule, ion, or group which is bonded to the metal atom or ion in a complex or coordination compound by a coordinate bond is commonly called a ligand. It may be either neutral, positively, or negatively charged.