Which of the following ligands is a bidentate ?
- EDTA
- Ethylenediamine
- Acetate
- Pyridine
The Correct Option is B
Solution and Explanation
Top Questions on coordination compounds
- Select correct statements. (I) Hybridisation of $\text{ClO}_4^-$ is $dsp^3$ (II) $[\text{Ni}(\text{CN})_4]^{2-}$ is tetrahedral (III) $[\text{Co}(\text{H}_2\text{O})_6]^{2+}$ has $sp^3d^2$ hybridisation (IV) $[\text{Mn}(\text{CN})_6]^{4-}$ has $sp^3d^2$ hybridisation
- JEE Main - 2026
- Chemistry
- coordination compounds
Given below are two statements:
Statement I: The number of species among \( SF_4 \), \( NH_4^+ \), \( [NiCl_4]^{2-} \), \( XeF_4 \), \( [PtCl_4]^{2-} \), \( SeF_4 \) and \( [Ni(CN)_4]^{2-} \), that have tetrahedral geometry is 3.
Statement II: In the set \( [NO_2] \), \( BeH_2 \), \( BF_3 \), \( AlCl_3 \), all the molecules have incomplete octet around the central atom.
In the light of the above statements, choose the correct answer from the options given below:- JEE Main - 2026
- Chemistry
- coordination compounds
- [Ni(PPh$_3$)$_2$Cl$_2$] is a paramagnetic complex. Identify the {INCORRECT statements about this complex. A. The complex exhibits geometrical isomerism.
B. The complex is white in colour.
C. The calculated spin-only magnetic moment of the complex is $2.84$ BM.
D. The calculated CFSE (Crystal Field Stabilization Energy) of Ni in this complex is $-0.8\Delta_o$.
E. The geometrical arrangement of ligands in this complex is similar to that in Ni(CO)$_4$.
Choose the correct answer from the options given below:- JEE Main - 2026
- Chemistry
- coordination compounds
- Based on Valence bond theory, explain why the geometry of [Ni(CO)₄] is tetrahedral and [Ni(CN)₄]²- is square planar.
- TN Board - 2026
- Chemistry
- coordination compounds
- Which type of isomerism is exhibited by the following compounds? (a) [Co(NH₃)₄ Br₂]Cl and [Co(NH₃)₄ ClBr]Br
(b) [Co(NH₃)₅ NO₂]²⁺ and [Co(NH₃)₅ ONO]²⁺
(c) [Pt(NH₃)₄][PdCl₄] and [Pd(NH₃)₄][PtCl₄]- TN Board - 2026
- Chemistry
- coordination compounds
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.