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1
JEE Main 2023 (Online) 29th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Correct order of spin only magnetic moment of the following complex ions is :

(Given At.no. Fe : 26, Co : 27)

A
$$\mathrm{[CoF_6]^{3-} > [FeF_6]^{3-} > [Co(C_2O_4)_3]^{3-}}$$
B
$$\mathrm{[FeF_6]^{3-} > [Co(C_2O_4)_3]^{3-} > [CoF_6]^{3-}}$$
C
$$\mathrm{[FeF_6]^{3-} > [CoF_6]^{3-} > [Co(C_2O_4)_3]^{3-}}$$
D
$$\mathrm{[Co(C_2O_4)_3]^{3-} > [CoF_6]^{3-} > [FeF_6]^{3-}}$$
2
JEE Main 2023 (Online) 29th January Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Chiral complex from the following is :

Here en = ethylene diamine

A
$$\mathrm{cis-[PtCl_2(en)_2]^{2+}}$$
B
$$\mathrm{trans-[Co(NH_3)_4Cl_2]^{+}}$$
C
$$\mathrm{trans-[PtCl_2(en)_2]^{2+}}$$
D
$$\mathrm{cis-[PtCl_2(NH_3)_2]}$$
3
JEE Main 2023 (Online) 25th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Match List I with List II

List I
Coordination entity		 List II
Wavelength of light absorbed in nm
A. $$\mathrm{[CoCl(NH_3)_5]^{2+}}$$ I. 310
B. $$\mathrm{[Co(NH_3)_6]^{3+}}$$ II. 475
C. $$\mathrm{[Co(CN)_6]^{3-}}$$ III. 535
D. $$\mathrm{[Cu(H_2O)_4]^{2+}}$$ IV. 600

Choose the correct answer from the options given below :

A
A-IV, B-I, C-III, D-II
B
A-III, B-II, C-I, D-IV
C
A-III, B-I, C-II, D-IV
D
A-II, B-III, C-IV, D-I
4
JEE Main 2023 (Online) 24th January Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The hybridization and magnetic behaviour of cobalt ion in $$\mathrm{[Co(NH_3)_6]^{3+}}$$ complex, respectively is :

A
$$\mathrm{sp^3d^2}$$ and paramagnetic
B
$$\mathrm{sp^3d^2}$$ and diamagnetic
C
$$\mathrm{d^2sp^3}$$ and diamagnetic
D
$$\mathrm{d^2sp^3}$$ and paramagnetic
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