1
JEE Main 2023 (Online) 11th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The complex that dissolves in water is :

A
$$\mathrm{Fe}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]_{3}$$
B
$$\left(\mathrm{NH}_{4}\right)_{3}\left[\mathrm{As}\left(\mathrm{Mo}_{3} \mathrm{O}_{10}\right)_{4}\right]$$
C
$$\mathrm{K}_{3}\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{6}\right]$$
D
$$\left[\mathrm{Fe}_{3}(\mathrm{OH})_{2}(\mathrm{OAc})_{6}\right] \mathrm{Cl}$$
2
JEE Main 2023 (Online) 11th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

The set which does not have ambidentate ligand(s) is :

A
$$\mathrm{C}_{2} \mathrm{O}_{4}{ }^{2-}, \mathrm{NO}_{2}{ }^{-}, \mathrm{NCS}^{-}$$
B
$$\mathrm{C}_{2} \mathrm{O}_{4}{ }^{2-}$$, ethylene diammine, $$\mathrm{H}_{2} \mathrm{O}$$
C
$$\mathrm{NO}_{2}^{-}, \mathrm{C}_{2} \mathrm{O}_{4}{ }^{2-}$$, EDTA $$^{4-}$$
D
$$\mathrm{EDTA}^{4-}, \mathrm{NCS}^{-}, \mathrm{C}_{2} \mathrm{O}_{4}{ }^{2-}$$
3
JEE Main 2023 (Online) 11th April Morning Shift
MCQ (Single Correct Answer)
+4
-1
Change Language

Which of the following complex has a possibility to exist as meridional isomer?

A
$$\mathrm{[Pt(NH_3)_2Cl_2]}$$
B
$$\left[\mathrm{Co}(\mathrm{en})_{2} \mathrm{Cl}_{2}\right]$$
C
$$\left[\mathrm{Co}(\mathrm{en})_{3}\right]$$
D
$$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{NO}_{2}\right)_{3}\right]$$
4
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
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