1
JEE Main 2023 (Online) 10th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The correct order of the number of unpaired electrons in the given complexes is

A. $$\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$$

B. $$\left[\mathrm{Fe} \mathrm{F}_{6}\right]^{3-}$$

C. $$\left[\mathrm{CoF}_{6}\right]^{3-}$$

D. $$\left.[\mathrm{Cr} \text { (oxalate})_{3}\right]^{3-}$$

E. $$\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$$

Choose the correct answer from the options given below:

A
E < A < B < D < C
B
A < E < D < C < B
C
A < E < C < B < D
D
E < A < D < C < B
2
JEE Main 2023 (Online) 10th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Match List I with List II

List - I
Complex
List - II
Crystal Field splitting energy ($$\Delta_0$$)
A. $${[Ti{({H_2}O)_6}]^{2 + }}$$ I. $$-1.2$$
B. $${[V{({H_2}O)_6}]^{2 + }}$$ II. $$-0.6$$
C. $${[Mn{({H_2}O)_6}]^{3 + }}$$ III. 0
D. $${[Fe{({H_2}O)_6}]^{3 + }}$$ IV. $$-0.8$$

Choose the correct answer from the options given below:

A
A-IV, B-I, C-II, D-III
B
A-II, B-IV, C-III, D-I
C
A-II, B-IV, C-I, D-III
D
A-IV, B-I, C-III, D-II
3
JEE Main 2023 (Online) 10th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The octahedral diamagnetic low spin complex among the following is :

A
[Co(NH$$_3$$)$$_6$$]$$^{3+}$$
B
[NiCl$$_4$$]$$^{2-}$$
C
[CoCl$$_6$$]$$^{3-}$$
D
[CoF$$_6$$]$$^{3-}$$
4
JEE Main 2023 (Online) 8th April Evening Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Match List I with List II

LIST I
Coordination Complex
LIST II
Number of unpaired electrons
A. $$\left[\mathrm{Cr}(\mathrm{CN})_{6}\right]^{3-}$$ I. 0
B. $$\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$$ II. 3
C. $$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$$ III. 2
D. $$\left[\mathrm{Ni}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+}$$ IV. 4

Choose the correct answer from the options given below:

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