JEE Main 2026 (Online) 28th January Evening Shift | Coordination Compounds Question 17 | Chemistry

JEE Main 2026 (Online) 28th January Evening Shift

MCQ (Single Correct Answer)

-1

The correct increasing order of spin-only magnetic moment values of the complex ions

[MnBr₄]²⁻ (A), [Cu(H₂O)₆]²⁺ (B), [Ni(CN)₄]²⁻ (C) and [Ni(H₂O)₆]²⁺ (D) is :

A = B < D < C

C = D < B < A

C < B < D < A

A = B < C < D

JEE Main 2026 (Online) 28th January Morning Shift

MCQ (Single Correct Answer)

-1

The correct statement among the following is:

$\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$ and $\left[\mathrm{NiCl}_4\right]^{2-}$ are diamagnetic and $\mathrm{Ni}(\mathrm{CO})_4$ is paramagnetic.

$\mathrm{Ni}(\mathrm{CO})_4$ is diamagnetic and $\left[\mathrm{NiCl}_4\right]^{2-}$ and $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$ are paramagnetic.

$\mathrm{Ni}(\mathrm{CO})_4$ and $\left[\mathrm{NiCl}_4\right]^{2-}$ are diamagnetic and $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$ is paramagnetic.

$\mathrm{Ni}(\mathrm{CO})_4$ and $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$ are diamagnetic and $\left[\mathrm{NiCl}_4\right]^{2-}$ is paramagnetic.

JEE Main 2026 (Online) 24th January Evening Shift

MCQ (Single Correct Answer)

-1

$$ \text { The wavelength of light absorbed for the following complexes are in the order } $$

JEE Main 2026 (Online) 24th January Evening Shift Chemistry - Coordination Compounds Question 20 English

III $<$ IV $<$ I $<$ II $<$ V

III $<$ I $<$ IV $<$ V $<$ II

III $<$ I $<$ IV $<$ II $<$ V

III $<$ I $<$ II $<$ IV $<$ V

JEE Main 2026 (Online) 24th January Morning Shift

MCQ (Single Correct Answer)

-1

Given below are two statements :

Statement I : Hybridisation, shape and spin only magnetic moment of $\mathrm{K}_3\left[\mathrm{Co}\left(\mathrm{CO}_3\right)_3\right]$ is $\mathrm{sp}^3 \mathrm{~d}^2$, octahedral and 4.9 BM respectively.

Statement II : Geometry, hybridisation and spin only magnetic moment values $(B M)$ of the ions $\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-},\left[\mathrm{MnBr}_4\right]^{2-}$ and $\left[\mathrm{CoF}_6\right]^{3-}$ respectively are square planar, tetrahedral, octahedral; $\mathrm{dsp}^2, \mathrm{sp}^3, \mathrm{sp}^3 \mathrm{~d}^2$ and $0,5.9,4.9$.

In the light of the above statements, choose the correct answer from the options given below

Both Statement I and Statement II are false

Statement I is true but Statement II is false

Both Statement I and Statement II are true

Statement I is false but Statement II is true

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