JEE Main 2025 (Online) 22nd January Morning Shift | Coordination Compounds Question 6 | Chemistry

1

JEE Main 2025 (Online) 22nd January Morning Shift

MCQ (Single Correct Answer)

+4

-1

From the magnetic behaviour of $\left[\mathrm{NiCl}_4\right]^{2-}$ (paramagnetic) and $\left[\mathrm{Ni}(\mathrm{CO})_4\right]$ (diamagnetic), choose the correct geometry and oxidation state.

A

$\left[\mathrm{NiCl}_4\right]^{2-}: \mathrm{Ni}(0)$, tetrahedral $\left[\mathrm{Ni}(\mathrm{CO})_4\right]: \mathrm{Ni}(0)$, square planar

B

$\left[\mathrm{NiCl}_4\right]^{2-}: \mathrm{Ni}^{\mathrm{II}}$, tetrahedral $\left[\mathrm{Ni}(\mathrm{CO})_4\right]: \mathrm{Ni}(0)$, tetrahedral

C

$\left[\mathrm{NiCl}_4\right]^{2-}: \mathrm{Ni}^{\mathrm{II}}$, tetrahedral $\left[\mathrm{Ni}(\mathrm{CO})_4\right]: \mathrm{Ni}^{I I}$, square planar

D

$\left[\mathrm{NiCl}_4\right]^{2-}: \mathrm{Ni}^{\mathrm{II}}$, square planar $\left[\mathrm{Ni}(\mathrm{CO})_4\right]: \mathrm{Ni}(0)$, square planar

2

JEE Main 2025 (Online) 22nd January Morning Shift

MCQ (Single Correct Answer)

+4

-1

In which of the following complexes the CFSE, $\Delta_o$ will be equal to zero?

A

$\mathrm{K}_3\left[\mathrm{Fe}(\mathrm{SCN})_6\right]$

B

$\left[\mathrm{Fe}(\mathrm{en})_3\right] \mathrm{Cl}_3$

C

$\left[\mathrm{Fe}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Br}_2$

D

$\mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]$

3

JEE Main 2024 (Online) 9th April Evening Shift

MCQ (Single Correct Answer)

+4

-1

Match List I with List II

	LIST I		LIST II
A.	$$\mathrm{K}_2\left[\mathrm{Ni}(\mathrm{CN})_4\right]$$	I.	$$sp^3$$
B.	$$\left[\mathrm{Ni}(\mathrm{CO})_4\right]$$	II.	$$sp^3d^2$$
C.	$$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right] \mathrm{Cl}_3$$	III.	$$dsp^2$$
D.	$$\mathrm{Na}_3\left[\mathrm{CoF}_6\right]$$	IV.	$$d^2sp^3$$

Choose the correct answer from the options given below:

A

A-III, B-II, C-IV, D-I

B

A-III, B-I, C-II, D-IV

C

A-I, B-III, C-II, D-IV

D

A-III, B-I, C-IV, D-II

4

JEE Main 2024 (Online) 9th April Evening Shift

MCQ (Single Correct Answer)

+4

-1

The coordination environment of $$\mathrm{Ca}^{2+}$$ ion in its complex with $$\mathrm{EDTA}^{4-}$$ is :

A

trigonal prismatic

B

octahedral

C

square planar

D

tetrahedral