COMEDK 2023 Morning Shift | Coordination Compounds Question 11 | Chemistry | COMEDK - ExamSIDE.Com

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1

COMEDK 2023 Morning Shift

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+1

-0

Which among the following is diamagnetic?

A

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

B

$$\left[\mathrm{Co}\left(\mathrm{F}_6\right)\right]^{3-}$$

C

$$\left[\mathrm{NiCl}_4\right]^{2-}$$

D

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

2

COMEDK 2023 Morning Shift

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+1

-0

The complex $$\left[\mathrm{PtCl}_2(\mathrm{en})_2\right]^{2+}$$ ion shows

A

structural isomerism

B

geometrical isomerism only

C

optical isomerism only

D

geometrical and optical isomerism

3

COMEDK 2023 Morning Shift

MCQ (Single Correct Answer)

+1

-0

The blue colouration obtained from the Lassaigne's test of nitrogen is due to the formation of

A

$$\mathrm{Fe}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3$$

B

$$\mathrm{Fe}_2\left[\mathrm{Fe}(\mathrm{CN})_6\right]_5$$

C

$$\mathrm{K}_2\left[\mathrm{Fe}(\mathrm{CN})_6\right]_5$$

D

$$\mathrm{K}_4\left[\mathrm{Fe}(\mathrm{CN})_6\right]_3$$

4

COMEDK 2023 Morning Shift

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+1

-0

Aqueous $$\mathrm{CuSO}_4$$ changes its colour from sky blue to deep blue on addition of $$\mathrm{NH}_3$$ because

A

$$\mathrm{Cu}^{2+}$$ forms hydrate

B

$$\mathrm{Cu}^{2+}$$ changes to $$\mathrm{Cu}^{+}$$

C

$$\left[\mathrm{Cu}\left(\mathrm{H}_2 \mathrm{O}\right)_4\right]^{2+}$$ is labile complex and changes to $$\left[\mathrm{Cu}\left(\mathrm{NH}_3\right)_4\right]^{2+}$$ as $$\mathrm{NH}_3$$ is stronger ligand than $$\mathrm{H}_2 \mathrm{O}$$

D

$$\mathrm{Cu}^{+}$$ changes to $$\mathrm{Cu}^{2+}$$

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