01. Nomenclature
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COORDINATION COMPOUNDS

274061 Assertion : $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$ is weakly paramagnetic while $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}$ is diamagnetic.
Reason: $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$ has +3 oxidation state while $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}$ has +2 oxidation state.

1 If both Assertion and Reason are correct and the 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-2017
COORDINATION COMPOUNDS

274063 Identify, from the following, the diamagnetic, tetrahedral complex

1 $\left[\mathrm{Ni}(\mathrm{Cl})_{4}\right]^{2-}$
2 $\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}$
3 $\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}$
4 $\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$
AP EAMCET-2017
COORDINATION COMPOUNDS

274064 Magnetic moment of ${ }^{3}\left[\mathrm{Ti}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{4+}$, $\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$ and $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}$ can be represented as $\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$.
They are in order of

1 $\mathrm{X}<\mathrm{Z}<\mathrm{Y}$
2 Y $<$ Z $<$ X
3 $\mathrm{X}<\mathrm{Y}<\mathrm{Z}$
4 Z $<$ Y $<$ X
JIPMER-2016
COORDINATION COMPOUNDS

274065 Permanganate ions are

1 tetrahedral and paramagnetic
2 tetrahedral and diamagnetic
3 octahedral and paramagnetic
4 octahedral and diamagnetic
AMU-2016
COORDINATION COMPOUNDS

274066 Consider the following two complex ions :
$\left[\mathrm{CoF}_{6}\right]^{3-}$ and $\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}$. Which of the following statements (s) is/are false?
(I) Both are octahedral.
(II) $\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}$ is diamagnetic while $\left[\mathrm{CoF}_{6}\right]^{3-}$ is paramagnetic.
(III) Both are outer orbital complexes.
(IV). In both the complexes, the central metal is in the same oxidation state.

1 Both (II) and (III)
2 (II), (III) and (IV)
3 Only (III)
4 Both (III) and (IV)
5 (I), (II) and (IV)
Kerala CEE-2016
NEET DIGITAL LIBRARY
COORDINATION COMPOUNDS

274061 Assertion : $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$ is weakly paramagnetic while $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}$ is diamagnetic.
Reason: $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$ has +3 oxidation state while $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}$ has +2 oxidation state.

1 If both Assertion and Reason are correct and the 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-2017
COORDINATION COMPOUNDS

274063 Identify, from the following, the diamagnetic, tetrahedral complex

1 $\left[\mathrm{Ni}(\mathrm{Cl})_{4}\right]^{2-}$
2 $\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}$
3 $\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}$
4 $\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$
AP EAMCET-2017
COORDINATION COMPOUNDS

274064 Magnetic moment of ${ }^{3}\left[\mathrm{Ti}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{4+}$, $\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$ and $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}$ can be represented as $\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$.
They are in order of

1 $\mathrm{X}<\mathrm{Z}<\mathrm{Y}$
2 Y $<$ Z $<$ X
3 $\mathrm{X}<\mathrm{Y}<\mathrm{Z}$
4 Z $<$ Y $<$ X
JIPMER-2016
COORDINATION COMPOUNDS

274065 Permanganate ions are

1 tetrahedral and paramagnetic
2 tetrahedral and diamagnetic
3 octahedral and paramagnetic
4 octahedral and diamagnetic
AMU-2016
COORDINATION COMPOUNDS

274066 Consider the following two complex ions :
$\left[\mathrm{CoF}_{6}\right]^{3-}$ and $\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}$. Which of the following statements (s) is/are false?
(I) Both are octahedral.
(II) $\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}$ is diamagnetic while $\left[\mathrm{CoF}_{6}\right]^{3-}$ is paramagnetic.
(III) Both are outer orbital complexes.
(IV). In both the complexes, the central metal is in the same oxidation state.

1 Both (II) and (III)
2 (II), (III) and (IV)
3 Only (III)
4 Both (III) and (IV)
5 (I), (II) and (IV)
Kerala CEE-2016
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COORDINATION COMPOUNDS

274061 Assertion : $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$ is weakly paramagnetic while $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}$ is diamagnetic.
Reason: $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$ has +3 oxidation state while $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}$ has +2 oxidation state.

1 If both Assertion and Reason are correct and the 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-2017
COORDINATION COMPOUNDS

274063 Identify, from the following, the diamagnetic, tetrahedral complex

1 $\left[\mathrm{Ni}(\mathrm{Cl})_{4}\right]^{2-}$
2 $\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}$
3 $\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}$
4 $\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$
AP EAMCET-2017
COORDINATION COMPOUNDS

274064 Magnetic moment of ${ }^{3}\left[\mathrm{Ti}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{4+}$, $\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$ and $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}$ can be represented as $\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$.
They are in order of

1 $\mathrm{X}<\mathrm{Z}<\mathrm{Y}$
2 Y $<$ Z $<$ X
3 $\mathrm{X}<\mathrm{Y}<\mathrm{Z}$
4 Z $<$ Y $<$ X
JIPMER-2016
COORDINATION COMPOUNDS

274065 Permanganate ions are

1 tetrahedral and paramagnetic
2 tetrahedral and diamagnetic
3 octahedral and paramagnetic
4 octahedral and diamagnetic
AMU-2016
COORDINATION COMPOUNDS

274066 Consider the following two complex ions :
$\left[\mathrm{CoF}_{6}\right]^{3-}$ and $\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}$. Which of the following statements (s) is/are false?
(I) Both are octahedral.
(II) $\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}$ is diamagnetic while $\left[\mathrm{CoF}_{6}\right]^{3-}$ is paramagnetic.
(III) Both are outer orbital complexes.
(IV). In both the complexes, the central metal is in the same oxidation state.

1 Both (II) and (III)
2 (II), (III) and (IV)
3 Only (III)
4 Both (III) and (IV)
5 (I), (II) and (IV)
Kerala CEE-2016
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COORDINATION COMPOUNDS

274061 Assertion : $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$ is weakly paramagnetic while $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}$ is diamagnetic.
Reason: $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$ has +3 oxidation state while $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}$ has +2 oxidation state.

1 If both Assertion and Reason are correct and the 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-2017
COORDINATION COMPOUNDS

274063 Identify, from the following, the diamagnetic, tetrahedral complex

1 $\left[\mathrm{Ni}(\mathrm{Cl})_{4}\right]^{2-}$
2 $\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}$
3 $\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}$
4 $\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$
AP EAMCET-2017
COORDINATION COMPOUNDS

274064 Magnetic moment of ${ }^{3}\left[\mathrm{Ti}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{4+}$, $\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$ and $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}$ can be represented as $\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$.
They are in order of

1 $\mathrm{X}<\mathrm{Z}<\mathrm{Y}$
2 Y $<$ Z $<$ X
3 $\mathrm{X}<\mathrm{Y}<\mathrm{Z}$
4 Z $<$ Y $<$ X
JIPMER-2016
COORDINATION COMPOUNDS

274065 Permanganate ions are

1 tetrahedral and paramagnetic
2 tetrahedral and diamagnetic
3 octahedral and paramagnetic
4 octahedral and diamagnetic
AMU-2016
COORDINATION COMPOUNDS

274066 Consider the following two complex ions :
$\left[\mathrm{CoF}_{6}\right]^{3-}$ and $\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}$. Which of the following statements (s) is/are false?
(I) Both are octahedral.
(II) $\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}$ is diamagnetic while $\left[\mathrm{CoF}_{6}\right]^{3-}$ is paramagnetic.
(III) Both are outer orbital complexes.
(IV). In both the complexes, the central metal is in the same oxidation state.

1 Both (II) and (III)
2 (II), (III) and (IV)
3 Only (III)
4 Both (III) and (IV)
5 (I), (II) and (IV)
Kerala CEE-2016
NEET DIGITAL LIBRARY
COORDINATION COMPOUNDS

274061 Assertion : $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$ is weakly paramagnetic while $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}$ is diamagnetic.
Reason: $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$ has +3 oxidation state while $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}$ has +2 oxidation state.

1 If both Assertion and Reason are correct and the 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-2017
COORDINATION COMPOUNDS

274063 Identify, from the following, the diamagnetic, tetrahedral complex

1 $\left[\mathrm{Ni}(\mathrm{Cl})_{4}\right]^{2-}$
2 $\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}$
3 $\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}$
4 $\left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$
AP EAMCET-2017
COORDINATION COMPOUNDS

274064 Magnetic moment of ${ }^{3}\left[\mathrm{Ti}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{4+}$, $\left[\mathrm{Mn}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{2+}$ and $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}$ can be represented as $\mathrm{X}, \mathrm{Y}$ and $\mathrm{Z}$.
They are in order of

1 $\mathrm{X}<\mathrm{Z}<\mathrm{Y}$
2 Y $<$ Z $<$ X
3 $\mathrm{X}<\mathrm{Y}<\mathrm{Z}$
4 Z $<$ Y $<$ X
JIPMER-2016
COORDINATION COMPOUNDS

274065 Permanganate ions are

1 tetrahedral and paramagnetic
2 tetrahedral and diamagnetic
3 octahedral and paramagnetic
4 octahedral and diamagnetic
AMU-2016
COORDINATION COMPOUNDS

274066 Consider the following two complex ions :
$\left[\mathrm{CoF}_{6}\right]^{3-}$ and $\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}$. Which of the following statements (s) is/are false?
(I) Both are octahedral.
(II) $\left[\mathrm{Co}\left(\mathrm{C}_{2} \mathrm{O}_{4}\right)_{3}\right]^{3-}$ is diamagnetic while $\left[\mathrm{CoF}_{6}\right]^{3-}$ is paramagnetic.
(III) Both are outer orbital complexes.
(IV). In both the complexes, the central metal is in the same oxidation state.

1 Both (II) and (III)
2 (II), (III) and (IV)
3 Only (III)
4 Both (III) and (IV)
5 (I), (II) and (IV)
Kerala CEE-2016