From the magnetic behaviour of \([NiCl_4]^2-\) (paramagnetic) and [Ni\((CO)_4\)] (diamagnetic), choose the correct geometry and oxidation state.
From the magnetic behaviour of \([NiCl_4]^2-\) (paramagnetic) and [Ni\((CO)_4\)] (diamagnetic), choose the correct geometry and oxidation state.
Show Hint
\([NiCl_4]^2-\) : Ni²⁺, square planar [Ni\((CO)_4\)] : Ni(0), square planar
\([NiCl_4]^2-\) : Ni²⁺, tetrahedral [Ni\((CO)_4\)] : Ni(0), tetrahedral
\([NiCl_4]^2-\): Ni²⁺, tetrahedral [Ni\((CO)_4\)] : Ni^2+, square planar
\([NiCl_4]^2-\) : Ni(0), tetrahedral [Ni\((CO)_4\)] : Ni(0), square planar
The Correct Option is B
Solution and Explanation
\([NiCl_4]^2-\)
Ni²⁺ - [Ar] 3d⁸ 4s⁰ → sp³, Tetrahedral
Number of unpaired electron = 2 paramagnetic
[Ni\((CO)_4\)]
Ni(0) → [Ar] 3d¹⁰ 4s⁰ (After rearrangement)
No unpaired electron
sp^3³, Tetrahedral, Diamagnetic
Top Questions on Coordination chemistry
- Identify the coordination complexes in which the central metal ion has a \(d^4\) configuration.
Choose the correct answer from the options given below :- JEE Main - 2025
- Chemistry
- Coordination chemistry
- The d-electronic configuration of an octahedral Co(II) complex having a magnetic moment of 3.95 BM is:
- JEE Main - 2025
- Chemistry
- Coordination chemistry
- The complex that shows Facial - Meridional isomerism is:
- JEE Main - 2025
- Chemistry
- Coordination chemistry
- In which of the following complexes the CFSE, \(\Delta_0\) will be equal to zero?
- JEE Main - 2025
- Chemistry
- Coordination chemistry
- Match List - I with List - II.
![[CoF6]3](https://images.collegedunia.com/public/qa/images/content/2025_03_17/Screenshot_ac0a74501742206019892.jpeg)
- JEE Main - 2025
- Chemistry
- Coordination chemistry
Questions Asked in JEE Main exam
- A small uncharged conducting sphere is placed in contact with an identical sphere but having \( 4 \times 10^{-6} \, \text{C} \) charge and then removed to a distance such that the force of repulsion between them is \( 9 \times 10^{-3} \, \text{N} \). The distance between them is (Take \( \frac{1}{4\pi \epsilon_0} = 9 \times 10^9 \) in SI units):
- JEE Main - 2025
- Fluid Mechanics
- A photograph of a landscape is captured by a drone camera at a height of 18 km. The size of the camera film is 2 cm \( \times \) 2 cm and the area of the landscape photographed is 400 km\(^2\). The focal length of the lens in the drone camera is:
- JEE Main - 2025
- The Kinetic Theory of Gases
- A particle oscillates along the \( x \)-axis according to the law, \( x(t) = x_0 \sin^2 \left( \frac{\pi t}{T} \right) \), where \( x_0 = 1 \, \text{m} \) and \( T \) is the time period of oscillation. The kinetic energy (\( K \)) of the particle as a function of \( x \) is correctly represented by the graph:
- JEE Main - 2025
- Logic gates
The magnitude of heat exchanged by a system for the given cyclic process ABC (as shown in the figure) is (in SI units):
- JEE Main - 2025
- Electric charges and fields
Given below are two statements. One is labelled as Assertion (A) and the other is labelled as Reason (R):
Assertion (A): An electron in a certain region of uniform magnetic field is moving with constant velocity in a straight line path.
Reason (R): The magnetic field in that region is along the direction of velocity of the electron.In the light of the above statements, choose the correct answer from the options given below:
- JEE Main - 2025
- Ray optics and optical instruments