JEE Main 2023 (Online) 10th April Morning Shift | Coordination Compounds Question 55 | Chemistry

1

JEE Main 2023 (Online) 10th April Morning Shift

MCQ (Single Correct Answer)

+4

-1

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$$_6$$]$$^{3-}$$

2

JEE Main 2023 (Online) 8th April Evening Shift

MCQ (Single Correct Answer)

+4

-1

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

3

JEE Main 2023 (Online) 8th April Morning Shift

MCQ (Single Correct Answer)

+4

-1

Which of the following complex is octahedral, diamagnetic and the most stable?

A

$$\mathrm{Na}_{3}\left[\mathrm{CoCl}_{6}\right]$$

B

$$\left[\mathrm{Co}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{2}$$

C

$$\mathrm{K}_{3}\left[\mathrm{Co}(\mathrm{CN})_{6}\right]$$

D

$$\left[\mathrm{Ni}\left(\mathrm{NH}_{3}\right)_{6}\right] \mathrm{Cl}_{2}$$

4

JEE Main 2023 (Online) 8th April Morning Shift

MCQ (Single Correct Answer)

+4

-1

The correct order of spin only magnetic moments for the following complex ions is

A

$$\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}<\left[\mathrm{CoF}_{6}\right]^{3-}<\left[\mathrm{MnBr}_{4}\right]^{2-}<\left[\mathrm{Mn}(\mathrm{CN})_{6}\right]^{3-}$$

B

$$\left[\mathrm{MnBr}_{4}\right]^{2-}<\left[\mathrm{CoF}_{6}\right]^{3-}<\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}<\left[\mathrm{Mn}(\mathrm{CN})_{6}\right]^{3-}$$

C

$$\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}<\left[\mathrm{Mn}(\mathrm{CN})_{6}\right]^{3-}<\left[\mathrm{CoF}_{6}\right]^{3-}<\left[\mathrm{MnBr}_{4}\right]^{2-}$$

D

$$\left[\mathrm{CoF}_{6}\right]^{3-}<\left[\mathrm{MnBr}_{4}\right]^{2-}<\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}<\left[\mathrm{Mn}(\mathrm{CN})_{6}\right]^{3-}$$