1
JEE Main 2020 (Online) 2nd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
Simplified absorption spectra of three complexes ((i), (ii) and (iii)) of Mn+ ion are provided below; their $$\lambda $$max values are marked as A, B and C respectively. The correct match between the complexes and their $$\lambda $$max values is JEE Main 2020 (Online) 2nd September Evening Slot Chemistry - Coordination Compounds Question 155 English
(i) [M(NCS)6](–6 + n)
(ii) [MF6](–6 + n)
(iii) [M(NH3)6]n+
A
A-(i), B-(ii), C-(iii)
B
A-(ii), B-(iii), C-(i)
C
A-(ii), B-(i), C-(iii)
D
A-(iii), B-(i), C-(ii)
2
JEE Main 2020 (Online) 2nd September Evening Slot
MCQ (Single Correct Answer)
+4
-1
The one that is not expected to show isomerism is :
A
[Pt(NH3)2Cl2]
B
[Ni(NH3)4(H2O)2]2+
C
[Ni(en)3]2+
D
[Ni(NH3)2Cl2]
3
JEE Main 2020 (Online) 2nd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
For octahedral Mn(II) and tetrahedral Ni(II) complexes, consider the following statements:

(I) both the complexes can be high spin.
(II) Ni(II) complex can very rarely be low spin.
(III) with strong field ligands, Mn(II) complexes can be low spin.
(IV)aqueous solution of Mn(II) ions is yellow in colour.

The correct statements are :
A
(I), (III) and (IV) only
B
(I) and (II) only
C
(II), (III) and (IV) only
D
(I), (II) and (III) only
4
JEE Main 2020 (Online) 2nd September Morning Slot
MCQ (Single Correct Answer)
+4
-1
Consider that a d6 metal ion (M2+) forms a complex with aqua ligands, and the spin only magnetic moment of the complex is 4.90 BM. The geometry and the crystal field stabilization energy of the complex is
A
tetrahedral and – 1.6 $$\Delta $$t + 1P
B
octahedral and –2.4 $$\Delta $$0 + 2P
C
tetrahedral and –0.6 $$\Delta $$t
D
octahedral and –1.6 $$\Delta $$0
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