iCON Education - Coordination Compounds AP-EAPCET Test

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Student

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AP-EAPCET

Test Name

Coordination Compounds

Subject

Chemistry

← Back to Coordination Compounds

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00:27:00

Question 1: Palette 1/27

AP-EAPCET 2025 MCQ

Which of the following exhibit ionisation isomerism?

I. $\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right] \mathrm{Cl}$

II. $\left[\mathrm{Ti}\left(\mathrm{H}_2 \mathrm{O}\right)_5 \mathrm{Cl}\right]\left(\mathrm{NO}_3\right)_2$

III. $\left[\mathrm{Pt}(\mathrm{en})\left(\mathrm{NH}_3\right) \mathrm{Cl}\right] \mathrm{NO}_3$

IV. $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4\left(\mathrm{NO}_3\right)_2\right] \mathrm{NO}_3$

II and III only

I and II only

II and IV only

III and IV only

Question 2: Palette 2/27

AP-EAPCET 2025 MCQ

Identify the set which does not have ambidentate ligand(s)

$\mathrm{NO}_2^{-}, \mathrm{CN}^{-}, \mathrm{C}_2 \mathrm{O}_4^{2-}$

$\mathrm{C}_2 \mathrm{O}_4^{2-}, \mathrm{H}_2 \mathrm{O}, \mathrm{SO}_4^{2-}$

$\mathrm{SCN}^{-}, \mathrm{NH}_3, \mathrm{CH}_3 \mathrm{COO}^{-}$

$\mathrm{CN}^{-}, \mathrm{SCN}^{-}, \mathrm{CH}_3 \mathrm{NH}_2$

Question 3: Palette 3/27

AP-EAPCET 2025 MCQ

The IUPAC name of the complex shown below is $\mathrm{K}_3\left[\mathrm{Co}(\mathrm{ox})_3\right]$

tripotassium trioxalatocobaltate (III)

potassium trioxalatecobaltate (III)

potassium trioxalatecobalt (III)

potassium trioxalatocobaltate (III)

Question 4: Palette 4/27

AP-EAPCET 2025 MCQ

The coordination number of chromium in $\mathrm{K}\left[\mathrm{Cr}\left(\mathrm{H}_2 \mathrm{O}\right)_2\left(\mathrm{C}_2 \mathrm{O}_4\right)_2\right]$ is

Question 5: Palette 5/27

AP-EAPCET 2025 MCQ

Identify the complex ion with spin only magnetic moment of 4.90 BM .

$\left[\mathrm{CO}\left(\mathrm{NH}_3\right)_6\right]^{3+}$

$\left[\mathrm{Cr}\left(\mathrm{NH}_3\right)_6\right]^{3+}$

$\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-}$

$\left[\mathrm{MnCl}_6\right]^{3-}$

Question 6: Palette 6/27

AP-EAPCET 2025 MCQ

In which one of the following complexes the metal ion has $t_{2 g}^3 e_g^2$ configuration?

$\left[\mathrm{Mn}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$

$\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$

$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$

$\left[\mathrm{Ni}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$

Question 7: Palette 7/27

AP-EAPCET 2025 MCQ

In $\mathrm{Fe}_x\left[\mathrm{Fe}_y(\mathrm{CN})_6\right]_3, x, y$ respectively, are

3, 2

4, 1

2, 3

1, 4

Question 8: Palette 8/27

AP-EAPCET 2025 MCQ

In which of the following, complex ions are not in correct order with respect to their magnitude of crystal field splitting?

$\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}>\left[\mathrm{FeF}_6\right]^{3-}$

$\left[\mathrm{Fe}(\mathrm{en})_3\right]^{3+}>\left[\mathrm{Fe}(\mathrm{NCS})_6\right]^{3-}$

$\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-}>\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$

$\left[\mathrm{Fe}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}>\left[\mathrm{Fe}\left(\mathrm{NH}_3\right)_6\right]^{2+}$

Question 9: Palette 9/27

AP-EAPCET 2025 MCQ

Which of the following complexes exhibit geometrical isomerism?

I. $\left[\mathrm{Co}(\mathrm{en})\left(\mathrm{NH}_3\right)_2 \mathrm{Cl}_2\right] \mathrm{Cl}$

II. $\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Cl}_2\right] \mathrm{Cl}$

III. $\left[\mathrm{Co}(\mathrm{en})_3, \mathrm{Cl}_3\right.$

IV. $\left[\mathrm{Co}(\mathrm{en})_2 \mathrm{Cl}_2\right] \mathrm{Br}$

I, II and III only

II, III and IV only

I, II and IV only

II and III only

Question 10: Palette 10/27

AP-EAPCET 2024 MCQ

Arrange the following in the increasing order of their magnetic moments

I. $\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-}$

II. $\left[\mathrm{Mn} \mathrm{Cl}_6\right]^{3-}$

III. $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$

IV. $\left[\mathrm{FeF}_6\right]^{3-}$

III $<$ I $<$ IV $<$ II

III $<$ IV $<$ II $<$ I

IV $<$ II $<$ I $<$ III

III $<$ I $<$ II $<$ IV

Question 11: Palette 11/27

AP-EAPCET 2024 MCQ

Which complex among the follwing is most paramagnetic?

$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{2+}$

$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+}$

$\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{2+}$

$\left[\mathrm{Co}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right]^{3+}$

Question 12: Palette 12/27

AP-EAPCET 2024 MCQ

Match the complexes in List-I with their hybridisation in list-II.

List-I (Complex)		List-II (Hybridisation)
I	$ \mathrm{Ni}(C O)_4 $	A	$ s p^3 d^2 $
II	$ \left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-} $	B	$ d^2 s p^3 $
III	$ \left[\mathrm{Co}\left(\mathrm{NH}_3\right)_6\right]^{3+} $	C	$ d s p^2 $
IV	$ \left[\mathrm{CoF}_6\right]^{3-} $	D	$ s p^3 $

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

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

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

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

Question 13: Palette 13/27

AP-EAPCET 2024 MCQ

Cobalt (III) chloride forms a green coloured complex ' $X$ ' with $\mathrm{NH}_3$. Number of moles of AgCl formed when excess of $\mathrm{AgNO}_3$ solution is added to 100 mL of 1 M solution of ' $X$ ' is

0.3

0.2

0.1

Question 14: Palette 14/27

AP-EAPCET 2024 MCQ

Improve silver ore $+\mathrm{CN}^{-}+\mathrm{H}_2 \mathrm{O} \xrightarrow{\mathrm{O}_2}[\mathrm{X}]^{-}+\mathrm{OH}^{-}$

$ [X]^{-}+\mathrm{Zn} \longrightarrow[Y]^{2-}+\mathrm{Ag} \text { (pure) } $

The co-ordination numbers of the metals in $[X]$. [ $Y$ ] are respectively

3,4

1,4

4,2

2,4

Question 15: Palette 15/27

AP-EAPCET 2024 MCQ

How many of the following ligands are stronger than

$ \begin{aligned} & \mathrm{H}_2 \mathrm{O} \text { ? } \\ & \mathrm{S}^{2-}, \mathrm{Br}^{-}, \mathrm{C}_2 \mathrm{O}_4^{2-}, \mathrm{CN}^{-} \text {, en, } \mathrm{NH}_3, \mathrm{CO}, \mathrm{OH}^{-} \\ & \begin{array}{ll} \text { } & \text { } \end{array} \end{aligned} $

Question 16: Palette 16/27

AP-EAPCET 2024 MCQ

Arrange the following in the increasing order of number of unpaired electrons present in the central metal ion

I. $\left[\mathrm{MnCl}_6\right]^{3-}$

II. $\left[\mathrm{FeF}_6\right]^{3-}$

III. $\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-}$

IV. $\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$

IV $<$ I $<$ III $<$ II

I $<$ III $<$ II $<$ IV

IV $<$ III $<$ I $<$ II

I $<$ II $<$ III $<$ IV

Question 17: Palette 17/27

AP-EAPCET 2024 MCQ

The paramagnetic complex ion, which has no unpaired electrons in $t_{2 g}$ orbitals is

$\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{4-}$

$\left[\mathrm{Fe}(\mathrm{CN})_6\right]^{3-}$

$\left[\mathrm{Zn}\left(\mathrm{NH}_3\right)_6\right]^{2+}$

$\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_6\right]^{2+}$

Question 18: Palette 18/27

AP-EAPCET 2024 MCQ

The spin only magnetic moments of the complexes $\left[\mathrm{Mn}(\mathrm{CN})_6\right]^{3-}$ and $\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)_3\right]^{3-}$ are respectively.

$2.84 \mathrm{BM}, 0 \mathrm{BM}$

$0 \mathrm{BM}, 2.84 \mathrm{BM}$

$0 \mathrm{BM}, 3.87 \mathrm{BM}$

$5.92 \mathrm{BM}, 2.84 \mathrm{BM}$

Question 19: Palette 19/27

AP-EAPCET 2022 MCQ

An element '$X$' with the atomic number 13 forms a complex of the type $[\mathrm{XCl}(\mathrm{H}_2 \mathrm{O})_5]^{2+}$. The covalency and oxidation state of $X$ in it are respectively

$5,+2$

$6,+2$

$5,+3$

$6,+3$

Question 20: Palette 20/27

AP-EAPCET 2022 MCQ

Identify the species, which does not exist?

$\left[\mathrm{SiF}_6\right]^{2-}$

$\left[\mathrm{SiCl}_6\right]^{2-}$

$\left[\mathrm{GeCl}_6\right]^{2-}$

$\left[\mathrm{Sn}(\mathrm{OH})_6\right]^{2-}$

Question 21: Palette 21/27

AP-EAPCET 2022 MCQ

The homoleptic complex in the following is

$\left[\mathrm{Co}\left(\mathrm{NH}_3\right)_4 \mathrm{Br}_2\right]^{\oplus}$

$\left[\mathrm{Co}\left(\mathrm{C}_2 \mathrm{O}_4\right)\left(\mathrm{NH}_3\right)_4\right]^{\oplus}$

$\left[\mathrm{CO}\left(\mathrm{NH}_3\right)_6\right]^{3 \oplus}$

$\left[\mathrm{Co}(\mathrm{CN})_4 \mathrm{Cl}_2\right]^{\ominus}$

Question 22: Palette 22/27

AP-EAPCET 2022 MCQ

The crystal field theory is successful in explaining which of the following?

I. Ligands as point charges.

II. Formation and structures of complexes.

III. Colour.

IV. Magnetic properties.

V. Covalent character of metal-ligand bonding.

I, II, III only

II, III, IV only

III, IV, V only

II, IV, V only

Question 23: Palette 23/27

AP-EAPCET 2022 MCQ

Which of the following is correct related to the colours of $\mathrm{TiCl}_3(X)$ and $\left[\mathrm{Ti}\left(\mathrm{H}_2 \mathrm{O}\right)_6\right] \mathrm{Cl}_3(Y)$ ?

$X=$ colourless $Y=$ coloured

$X=$ colouored $Y=$ coloured

$X=$ colourless $Y=$ colourless

$X=$ coloured $Y=$ colourless

Question 24: Palette 24/27

AP-EAPCET 2021 MCQ

$\mathrm{AlF}_3$ is soluble in HF only in the presence of KF due to formation of

$\mathrm{AlH}_3$

$\left[\mathrm{AlH}_6\right]^{3-}$

$\left[\mathrm{AlF}_6\right]^{3-}$

$\mathrm{K}\left[\mathrm{AlF}_3 \mathrm{H}\right]$

Question 25: Palette 25/27

AP-EAPCET 2021 MCQ

Potassium cyanide is made alkaline with NaOH and boiled with thiosulphate ions. The solution is cooled and acidified with HCl and this solution with iron (III) chloride produces

prussian blue colour solution

blood red colour solution

dark brown colour solution

green colour solution

Question 26: Palette 26/27

AP-EAPCET 2021 MCQ

Which of the following complexes formed by nickel is tetrahedral and paramagnetic?

$\left[\mathrm{Ni}(\mathrm{CN})_4\right]^{2-}$

$\left[\mathrm{Ni}(\mathrm{CO})_4\right]$

$\left[\mathrm{Ni}(\mathrm{Cl})_4\right]^{2-}$

$\left[\mathrm{Ni}\left(\mathrm{NH}_3\right)_6\right]^{2+}$

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