01. Nomenclature
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COORDINATION COMPOUNDS

274038 The magnetic moment of an octahedral homoleptic Mn (II) complex is 5.9 BM. The suitable ligand for this complex is

1 $\mathrm{CN}^{-}$
2 ethylenediamine
3 $\mathrm{NCS}^{-}$
4 $\mathrm{CO}$
JEE Main 2019
COORDINATION COMPOUNDS

274039 The correct order of the spin only magnetic moment of metal ions in the following low spin complexes
$\left[\mathrm{V}(\mathrm{CN})_{6}\right]^{4-}, \quad\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}, \quad\left[\operatorname{Ru}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}, \quad$ and $\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+}$, is

1 $\mathrm{Cr}^{2+}>\mathrm{Ru}^{3+}>\mathrm{Fe}^{2+}>\mathrm{V}^{2+}$
2 $\mathrm{V}^{2+}>\mathrm{Cr}^{2+}>\mathrm{Ru}^{3+}>\mathrm{Fe}^{2+}$
3 $\mathrm{V}^{2+}>\mathrm{Ru}^{3+}>\mathrm{Cr}^{2+}>\mathrm{Fe}^{2+}$
4 $\mathrm{Cr}^{2+}>\mathrm{V}^{2+}>\mathrm{Ru}^{3+}>\mathrm{Fe}^{2+}$
JEE Main 2019
COORDINATION COMPOUNDS

274040 Assertion: Potassium ferricyanide, $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$ is diamagnetic, while potassium ferrocyanide, $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}$ is paramagnetic.
Reason: Oxidation state of $\mathrm{Fe}$ in potassium ferricyanide is +2 , but in potassium ferrocyanide its oxidation state is +3 .

1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
AIIMS 25 May 2019 (Evening)
COORDINATION COMPOUNDS

274041 The hybridization and magnetic behavior of complex $\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$ is:

1 $\mathrm{sp}^{3}$, paramagnetic
2 $\mathrm{dsp}^{2}$, paramagnetic
3 $\mathrm{dsp}^{2}$, diamagnetic
4 $\mathrm{sp}^{3}$, diamagnetic
AIIMS 25 May 2019 (Morning)
COORDINATION COMPOUNDS

274043 Choose the complex which is paramagnetic
(i) $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$
(ii) $\mathrm{K}_{3}\left[\mathrm{Cr}(\mathrm{CN})_{6}\right]$
(iii) $\mathrm{K}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$
(iv) $\mathrm{K}_{2}\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]$

1 (i), (ii) and (iii)
2 (i), (iii) and (iv)
3 (ii), (iii) and (iv)
4 (i), (ii) and (iv)
VITEEE -2019
Join With Us for More Updates
COORDINATION COMPOUNDS

274038 The magnetic moment of an octahedral homoleptic Mn (II) complex is 5.9 BM. The suitable ligand for this complex is

1 $\mathrm{CN}^{-}$
2 ethylenediamine
3 $\mathrm{NCS}^{-}$
4 $\mathrm{CO}$
JEE Main 2019
COORDINATION COMPOUNDS

274039 The correct order of the spin only magnetic moment of metal ions in the following low spin complexes
$\left[\mathrm{V}(\mathrm{CN})_{6}\right]^{4-}, \quad\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}, \quad\left[\operatorname{Ru}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}, \quad$ and $\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+}$, is

1 $\mathrm{Cr}^{2+}>\mathrm{Ru}^{3+}>\mathrm{Fe}^{2+}>\mathrm{V}^{2+}$
2 $\mathrm{V}^{2+}>\mathrm{Cr}^{2+}>\mathrm{Ru}^{3+}>\mathrm{Fe}^{2+}$
3 $\mathrm{V}^{2+}>\mathrm{Ru}^{3+}>\mathrm{Cr}^{2+}>\mathrm{Fe}^{2+}$
4 $\mathrm{Cr}^{2+}>\mathrm{V}^{2+}>\mathrm{Ru}^{3+}>\mathrm{Fe}^{2+}$
JEE Main 2019
COORDINATION COMPOUNDS

274040 Assertion: Potassium ferricyanide, $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$ is diamagnetic, while potassium ferrocyanide, $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}$ is paramagnetic.
Reason: Oxidation state of $\mathrm{Fe}$ in potassium ferricyanide is +2 , but in potassium ferrocyanide its oxidation state is +3 .

1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
AIIMS 25 May 2019 (Evening)
COORDINATION COMPOUNDS

274041 The hybridization and magnetic behavior of complex $\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$ is:

1 $\mathrm{sp}^{3}$, paramagnetic
2 $\mathrm{dsp}^{2}$, paramagnetic
3 $\mathrm{dsp}^{2}$, diamagnetic
4 $\mathrm{sp}^{3}$, diamagnetic
AIIMS 25 May 2019 (Morning)
COORDINATION COMPOUNDS

274043 Choose the complex which is paramagnetic
(i) $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$
(ii) $\mathrm{K}_{3}\left[\mathrm{Cr}(\mathrm{CN})_{6}\right]$
(iii) $\mathrm{K}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$
(iv) $\mathrm{K}_{2}\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]$

1 (i), (ii) and (iii)
2 (i), (iii) and (iv)
3 (ii), (iii) and (iv)
4 (i), (ii) and (iv)
VITEEE -2019
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COORDINATION COMPOUNDS

274038 The magnetic moment of an octahedral homoleptic Mn (II) complex is 5.9 BM. The suitable ligand for this complex is

1 $\mathrm{CN}^{-}$
2 ethylenediamine
3 $\mathrm{NCS}^{-}$
4 $\mathrm{CO}$
JEE Main 2019
COORDINATION COMPOUNDS

274039 The correct order of the spin only magnetic moment of metal ions in the following low spin complexes
$\left[\mathrm{V}(\mathrm{CN})_{6}\right]^{4-}, \quad\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}, \quad\left[\operatorname{Ru}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}, \quad$ and $\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+}$, is

1 $\mathrm{Cr}^{2+}>\mathrm{Ru}^{3+}>\mathrm{Fe}^{2+}>\mathrm{V}^{2+}$
2 $\mathrm{V}^{2+}>\mathrm{Cr}^{2+}>\mathrm{Ru}^{3+}>\mathrm{Fe}^{2+}$
3 $\mathrm{V}^{2+}>\mathrm{Ru}^{3+}>\mathrm{Cr}^{2+}>\mathrm{Fe}^{2+}$
4 $\mathrm{Cr}^{2+}>\mathrm{V}^{2+}>\mathrm{Ru}^{3+}>\mathrm{Fe}^{2+}$
JEE Main 2019
COORDINATION COMPOUNDS

274040 Assertion: Potassium ferricyanide, $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$ is diamagnetic, while potassium ferrocyanide, $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}$ is paramagnetic.
Reason: Oxidation state of $\mathrm{Fe}$ in potassium ferricyanide is +2 , but in potassium ferrocyanide its oxidation state is +3 .

1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
AIIMS 25 May 2019 (Evening)
COORDINATION COMPOUNDS

274041 The hybridization and magnetic behavior of complex $\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$ is:

1 $\mathrm{sp}^{3}$, paramagnetic
2 $\mathrm{dsp}^{2}$, paramagnetic
3 $\mathrm{dsp}^{2}$, diamagnetic
4 $\mathrm{sp}^{3}$, diamagnetic
AIIMS 25 May 2019 (Morning)
COORDINATION COMPOUNDS

274043 Choose the complex which is paramagnetic
(i) $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$
(ii) $\mathrm{K}_{3}\left[\mathrm{Cr}(\mathrm{CN})_{6}\right]$
(iii) $\mathrm{K}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$
(iv) $\mathrm{K}_{2}\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]$

1 (i), (ii) and (iii)
2 (i), (iii) and (iv)
3 (ii), (iii) and (iv)
4 (i), (ii) and (iv)
VITEEE -2019
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COORDINATION COMPOUNDS

274038 The magnetic moment of an octahedral homoleptic Mn (II) complex is 5.9 BM. The suitable ligand for this complex is

1 $\mathrm{CN}^{-}$
2 ethylenediamine
3 $\mathrm{NCS}^{-}$
4 $\mathrm{CO}$
JEE Main 2019
COORDINATION COMPOUNDS

274039 The correct order of the spin only magnetic moment of metal ions in the following low spin complexes
$\left[\mathrm{V}(\mathrm{CN})_{6}\right]^{4-}, \quad\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}, \quad\left[\operatorname{Ru}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}, \quad$ and $\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+}$, is

1 $\mathrm{Cr}^{2+}>\mathrm{Ru}^{3+}>\mathrm{Fe}^{2+}>\mathrm{V}^{2+}$
2 $\mathrm{V}^{2+}>\mathrm{Cr}^{2+}>\mathrm{Ru}^{3+}>\mathrm{Fe}^{2+}$
3 $\mathrm{V}^{2+}>\mathrm{Ru}^{3+}>\mathrm{Cr}^{2+}>\mathrm{Fe}^{2+}$
4 $\mathrm{Cr}^{2+}>\mathrm{V}^{2+}>\mathrm{Ru}^{3+}>\mathrm{Fe}^{2+}$
JEE Main 2019
COORDINATION COMPOUNDS

274040 Assertion: Potassium ferricyanide, $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$ is diamagnetic, while potassium ferrocyanide, $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}$ is paramagnetic.
Reason: Oxidation state of $\mathrm{Fe}$ in potassium ferricyanide is +2 , but in potassium ferrocyanide its oxidation state is +3 .

1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
AIIMS 25 May 2019 (Evening)
COORDINATION COMPOUNDS

274041 The hybridization and magnetic behavior of complex $\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$ is:

1 $\mathrm{sp}^{3}$, paramagnetic
2 $\mathrm{dsp}^{2}$, paramagnetic
3 $\mathrm{dsp}^{2}$, diamagnetic
4 $\mathrm{sp}^{3}$, diamagnetic
AIIMS 25 May 2019 (Morning)
COORDINATION COMPOUNDS

274043 Choose the complex which is paramagnetic
(i) $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$
(ii) $\mathrm{K}_{3}\left[\mathrm{Cr}(\mathrm{CN})_{6}\right]$
(iii) $\mathrm{K}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$
(iv) $\mathrm{K}_{2}\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]$

1 (i), (ii) and (iii)
2 (i), (iii) and (iv)
3 (ii), (iii) and (iv)
4 (i), (ii) and (iv)
VITEEE -2019
Join With Us for More Updates
COORDINATION COMPOUNDS

274038 The magnetic moment of an octahedral homoleptic Mn (II) complex is 5.9 BM. The suitable ligand for this complex is

1 $\mathrm{CN}^{-}$
2 ethylenediamine
3 $\mathrm{NCS}^{-}$
4 $\mathrm{CO}$
JEE Main 2019
COORDINATION COMPOUNDS

274039 The correct order of the spin only magnetic moment of metal ions in the following low spin complexes
$\left[\mathrm{V}(\mathrm{CN})_{6}\right]^{4-}, \quad\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}, \quad\left[\operatorname{Ru}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}, \quad$ and $\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+}$, is

1 $\mathrm{Cr}^{2+}>\mathrm{Ru}^{3+}>\mathrm{Fe}^{2+}>\mathrm{V}^{2+}$
2 $\mathrm{V}^{2+}>\mathrm{Cr}^{2+}>\mathrm{Ru}^{3+}>\mathrm{Fe}^{2+}$
3 $\mathrm{V}^{2+}>\mathrm{Ru}^{3+}>\mathrm{Cr}^{2+}>\mathrm{Fe}^{2+}$
4 $\mathrm{Cr}^{2+}>\mathrm{V}^{2+}>\mathrm{Ru}^{3+}>\mathrm{Fe}^{2+}$
JEE Main 2019
COORDINATION COMPOUNDS

274040 Assertion: Potassium ferricyanide, $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$ is diamagnetic, while potassium ferrocyanide, $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}$ is paramagnetic.
Reason: Oxidation state of $\mathrm{Fe}$ in potassium ferricyanide is +2 , but in potassium ferrocyanide its oxidation state is +3 .

1 If both Assertion and Reason are correct and Reason is the correct explanation of Assertion.
2 If both Assertion and Reason are correct, but Reason is not the correct explanation of Assertion.
3 If Assertion is correct but Reason is incorrect.
4 If both the Assertion and Reason are incorrect.
AIIMS 25 May 2019 (Evening)
COORDINATION COMPOUNDS

274041 The hybridization and magnetic behavior of complex $\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$ is:

1 $\mathrm{sp}^{3}$, paramagnetic
2 $\mathrm{dsp}^{2}$, paramagnetic
3 $\mathrm{dsp}^{2}$, diamagnetic
4 $\mathrm{sp}^{3}$, diamagnetic
AIIMS 25 May 2019 (Morning)
COORDINATION COMPOUNDS

274043 Choose the complex which is paramagnetic
(i) $\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$
(ii) $\mathrm{K}_{3}\left[\mathrm{Cr}(\mathrm{CN})_{6}\right]$
(iii) $\mathrm{K}_{3}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]$
(iv) $\mathrm{K}_{2}\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]$

1 (i), (ii) and (iii)
2 (i), (iii) and (iv)
3 (ii), (iii) and (iv)
4 (i), (ii) and (iv)
VITEEE -2019