Question:
Identify the geometry of \([\text{Ni(CN)}_{4}]^{2-}\) complex.
Identify the geometry of \([\text{Ni(CN)}_{4}]^{2-}\) complex.
Show Hint
Ni2+ is d8 and cyanide is a strong field ligand, which pairs the electrons and gives dsp2 hybridisation.
Updated On: Nov 12, 2026
- Octahedral
- Tetrahedral
- Square planar
- Hexagonal
Show Solution
Verified By Collegedunia
The Correct Option is C
Solution and Explanation
Step 1: Understanding the Concept
The geometry of a complex follows from the hybridisation of the central metal ion, which depends on the strength of the ligand.
Step 2: Find the metal configuration
In \([\text{Ni(CN)}_4]^{2-}\), Ni is in the +2 state: \(3d^{8}\).
Step 3: Effect of the ligand
\(\text{CN}^{-}\) is a strong field ligand, so the eight d electrons pair up in four d orbitals and one 3d orbital is vacated.
Step 4: Hybridisation
One 3d, the 4s and two 4p orbitals mix to give \(dsp^{2}\) hybrid orbitals, which are directed to the corners of a square.
Final Answer:
The complex is square planar. \[ \boxed{\text{(C) }\text{Square planar}} \]
The geometry of a complex follows from the hybridisation of the central metal ion, which depends on the strength of the ligand.
Step 2: Find the metal configuration
In \([\text{Ni(CN)}_4]^{2-}\), Ni is in the +2 state: \(3d^{8}\).
Step 3: Effect of the ligand
\(\text{CN}^{-}\) is a strong field ligand, so the eight d electrons pair up in four d orbitals and one 3d orbital is vacated.
Step 4: Hybridisation
One 3d, the 4s and two 4p orbitals mix to give \(dsp^{2}\) hybrid orbitals, which are directed to the corners of a square.
Final Answer:
The complex is square planar. \[ \boxed{\text{(C) }\text{Square planar}} \]
Was this answer helpful?
0
0
Top MHT CET Chemistry Questions
- The temperature of $32^{\circ}C$ is equivalent to
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
- If a metal crystallises in bcc structure with edge length of unit cell $4.29 \times 10^{-8}\, cm$ the radius of metal atom is
- Which of the following oxides can act both as an oxidising agent as well as reducing agent ?
- "The mass and energy both are conserved in an isolated system", is the statement of
View More Questions
Top MHT CET Werner’s Theory of Coordination Compounds Questions
- Identify the correct match from the following for coordinate complex (column A) and respective geometry (column B)
Column A
Coordination complexColumn B
Geometry(A). \([\text{Ni}(\text{CN})_{4}]^{-2}\) (I). Trigonal bipyramidal (B). \([\text{Ag}(\text{NH}_{3})_{2}]^{+}\) (II). Linear (C). \([\text{Ni}(\text{Cl})_{4}]^{2-}\) (III). Tetrahedral (D). \([\text{Fe}(\text{CO})_{5}]\) (IV). Square planar - What type of hybridization is present in \([\text{CoF}_{6}]^{3-}\) ?
Top MHT CET Questions
- During r- DNA technology, which one of the following enzymes is used for cleaving DNA molecule ?
- In non uniform circular motion, the ratio of tangential to radial acceleration is (r = radius of circle, $v =$ speed of the particle, $\alpha =$ angular acceleration)
- The temperature of $32^{\circ}C$ is equivalent to
- The line $5x + y - 1 = 0$ coincides with one of the lines given by $5x^2 + xy - kx - 2y + 2 = 0 $ then the value of k is
- The heat of formation of water is $ 260\, kJ $ . How much $ H_2O $ is decomposed by $ 130\, kJ $ of heat ?
View More Questions