04. Spectrochemical Series, Complex Stability
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COORDINATION COMPOUNDS

274238 In the isoelectronic series of metal carbonyl, the $\mathrm{CO}$ bond strength is expected to increase in the order:

1 $\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]^{+}<\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]<\left[\mathrm{V}(\mathrm{CO})_{6}\right]^{-}$
2 $\left[\mathrm{V}(\mathrm{CO})_{6}\right]^{-}<\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]<\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]^{+}$
3 $\left[\mathrm{V}(\mathrm{CO})_{6}\right]^{-}<\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]^{+}<\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]$
4 $\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]<\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]^{+}<\left[\mathrm{V}(\mathrm{CO})_{6}\right]^{-}$
AIIMS-2014
COORDINATION COMPOUNDS

274239 Which method can be used to distinguish
$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]\left[\mathrm{Cr}\left(\mathrm{NO}_{2}\right)_{6}\right]$ and
$\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{6}\right]$ ?

1 By measurement of their conductivity.
2 By titration method.
3 By precipitation method with $\mathrm{Ag} \mathrm{NO}_{3}$.
4 By electrolysis of their aqueous solutions.
AIIMS-2011
COORDINATION COMPOUNDS

274246 The hypothetical complex chloro
diaquatriammine cobalt (III) chloride can be
represented as

1 $\left[\mathrm{CoCl}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2}\right] \mathrm{Cl}_{2}$
2 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right) \mathrm{Cl}_{3}\right]$
3 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2} \mathrm{Cl}\right]$
4 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right)_{3}\right] \mathrm{Cl}_{3}$
BCECE-2012
COORDINATION COMPOUNDS

274262 The complex ion which has no d-electrons in the central metal atom is

1 $\left[\mathrm{MnO}_{4}\right]$
2 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$
3 $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$
4 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}$
JIPMER-2010
COORDINATION COMPOUNDS

274266 Which among the following statements are true for the complex $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]\left[\mathrm{Cr}(\mathrm{CN})_{6}\right]$ ?
1.It is a non-electrolyte
2.The magnitude of the charge on each complex ion is 3
3.The complex will not conduct current
4.The complex will exhibit coordination isomerism
5.The magnitude of the charge on each complex ion is 1

1 1 and 4
2 1 and 2
3 1 and 3
4 3 and 5
5 2 and 4
Kerala-CEE-2010
NEET DIGITAL LIBRARY
COORDINATION COMPOUNDS

274238 In the isoelectronic series of metal carbonyl, the $\mathrm{CO}$ bond strength is expected to increase in the order:

1 $\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]^{+}<\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]<\left[\mathrm{V}(\mathrm{CO})_{6}\right]^{-}$
2 $\left[\mathrm{V}(\mathrm{CO})_{6}\right]^{-}<\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]<\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]^{+}$
3 $\left[\mathrm{V}(\mathrm{CO})_{6}\right]^{-}<\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]^{+}<\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]$
4 $\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]<\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]^{+}<\left[\mathrm{V}(\mathrm{CO})_{6}\right]^{-}$
AIIMS-2014
COORDINATION COMPOUNDS

274239 Which method can be used to distinguish
$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]\left[\mathrm{Cr}\left(\mathrm{NO}_{2}\right)_{6}\right]$ and
$\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{6}\right]$ ?

1 By measurement of their conductivity.
2 By titration method.
3 By precipitation method with $\mathrm{Ag} \mathrm{NO}_{3}$.
4 By electrolysis of their aqueous solutions.
AIIMS-2011
COORDINATION COMPOUNDS

274246 The hypothetical complex chloro
diaquatriammine cobalt (III) chloride can be
represented as

1 $\left[\mathrm{CoCl}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2}\right] \mathrm{Cl}_{2}$
2 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right) \mathrm{Cl}_{3}\right]$
3 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2} \mathrm{Cl}\right]$
4 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right)_{3}\right] \mathrm{Cl}_{3}$
BCECE-2012
COORDINATION COMPOUNDS

274262 The complex ion which has no d-electrons in the central metal atom is

1 $\left[\mathrm{MnO}_{4}\right]$
2 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$
3 $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$
4 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}$
JIPMER-2010
COORDINATION COMPOUNDS

274266 Which among the following statements are true for the complex $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]\left[\mathrm{Cr}(\mathrm{CN})_{6}\right]$ ?
1.It is a non-electrolyte
2.The magnitude of the charge on each complex ion is 3
3.The complex will not conduct current
4.The complex will exhibit coordination isomerism
5.The magnitude of the charge on each complex ion is 1

1 1 and 4
2 1 and 2
3 1 and 3
4 3 and 5
5 2 and 4
Kerala-CEE-2010
Join With Us for More Updates
COORDINATION COMPOUNDS

274238 In the isoelectronic series of metal carbonyl, the $\mathrm{CO}$ bond strength is expected to increase in the order:

1 $\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]^{+}<\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]<\left[\mathrm{V}(\mathrm{CO})_{6}\right]^{-}$
2 $\left[\mathrm{V}(\mathrm{CO})_{6}\right]^{-}<\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]<\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]^{+}$
3 $\left[\mathrm{V}(\mathrm{CO})_{6}\right]^{-}<\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]^{+}<\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]$
4 $\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]<\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]^{+}<\left[\mathrm{V}(\mathrm{CO})_{6}\right]^{-}$
AIIMS-2014
COORDINATION COMPOUNDS

274239 Which method can be used to distinguish
$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]\left[\mathrm{Cr}\left(\mathrm{NO}_{2}\right)_{6}\right]$ and
$\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{6}\right]$ ?

1 By measurement of their conductivity.
2 By titration method.
3 By precipitation method with $\mathrm{Ag} \mathrm{NO}_{3}$.
4 By electrolysis of their aqueous solutions.
AIIMS-2011
COORDINATION COMPOUNDS

274246 The hypothetical complex chloro
diaquatriammine cobalt (III) chloride can be
represented as

1 $\left[\mathrm{CoCl}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2}\right] \mathrm{Cl}_{2}$
2 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right) \mathrm{Cl}_{3}\right]$
3 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2} \mathrm{Cl}\right]$
4 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right)_{3}\right] \mathrm{Cl}_{3}$
BCECE-2012
COORDINATION COMPOUNDS

274262 The complex ion which has no d-electrons in the central metal atom is

1 $\left[\mathrm{MnO}_{4}\right]$
2 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$
3 $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$
4 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}$
JIPMER-2010
COORDINATION COMPOUNDS

274266 Which among the following statements are true for the complex $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]\left[\mathrm{Cr}(\mathrm{CN})_{6}\right]$ ?
1.It is a non-electrolyte
2.The magnitude of the charge on each complex ion is 3
3.The complex will not conduct current
4.The complex will exhibit coordination isomerism
5.The magnitude of the charge on each complex ion is 1

1 1 and 4
2 1 and 2
3 1 and 3
4 3 and 5
5 2 and 4
Kerala-CEE-2010
For More Updates join with Us
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COORDINATION COMPOUNDS

274238 In the isoelectronic series of metal carbonyl, the $\mathrm{CO}$ bond strength is expected to increase in the order:

1 $\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]^{+}<\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]<\left[\mathrm{V}(\mathrm{CO})_{6}\right]^{-}$
2 $\left[\mathrm{V}(\mathrm{CO})_{6}\right]^{-}<\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]<\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]^{+}$
3 $\left[\mathrm{V}(\mathrm{CO})_{6}\right]^{-}<\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]^{+}<\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]$
4 $\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]<\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]^{+}<\left[\mathrm{V}(\mathrm{CO})_{6}\right]^{-}$
AIIMS-2014
COORDINATION COMPOUNDS

274239 Which method can be used to distinguish
$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]\left[\mathrm{Cr}\left(\mathrm{NO}_{2}\right)_{6}\right]$ and
$\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{6}\right]$ ?

1 By measurement of their conductivity.
2 By titration method.
3 By precipitation method with $\mathrm{Ag} \mathrm{NO}_{3}$.
4 By electrolysis of their aqueous solutions.
AIIMS-2011
COORDINATION COMPOUNDS

274246 The hypothetical complex chloro
diaquatriammine cobalt (III) chloride can be
represented as

1 $\left[\mathrm{CoCl}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2}\right] \mathrm{Cl}_{2}$
2 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right) \mathrm{Cl}_{3}\right]$
3 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2} \mathrm{Cl}\right]$
4 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right)_{3}\right] \mathrm{Cl}_{3}$
BCECE-2012
COORDINATION COMPOUNDS

274262 The complex ion which has no d-electrons in the central metal atom is

1 $\left[\mathrm{MnO}_{4}\right]$
2 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$
3 $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$
4 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}$
JIPMER-2010
COORDINATION COMPOUNDS

274266 Which among the following statements are true for the complex $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]\left[\mathrm{Cr}(\mathrm{CN})_{6}\right]$ ?
1.It is a non-electrolyte
2.The magnitude of the charge on each complex ion is 3
3.The complex will not conduct current
4.The complex will exhibit coordination isomerism
5.The magnitude of the charge on each complex ion is 1

1 1 and 4
2 1 and 2
3 1 and 3
4 3 and 5
5 2 and 4
Kerala-CEE-2010
NEET DIGITAL LIBRARY
COORDINATION COMPOUNDS

274238 In the isoelectronic series of metal carbonyl, the $\mathrm{CO}$ bond strength is expected to increase in the order:

1 $\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]^{+}<\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]<\left[\mathrm{V}(\mathrm{CO})_{6}\right]^{-}$
2 $\left[\mathrm{V}(\mathrm{CO})_{6}\right]^{-}<\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]<\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]^{+}$
3 $\left[\mathrm{V}(\mathrm{CO})_{6}\right]^{-}<\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]^{+}<\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]$
4 $\left[\mathrm{Cr}(\mathrm{CO})_{6}\right]<\left[\mathrm{Mn}(\mathrm{CO})_{6}\right]^{+}<\left[\mathrm{V}(\mathrm{CO})_{6}\right]^{-}$
AIIMS-2014
COORDINATION COMPOUNDS

274239 Which method can be used to distinguish
$\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]\left[\mathrm{Cr}\left(\mathrm{NO}_{2}\right)_{6}\right]$ and
$\left[\mathrm{Cr}\left(\mathrm{NH}_{3}\right)_{6}\right]\left[\mathrm{Co}\left(\mathrm{NO}_{2}\right)_{6}\right]$ ?

1 By measurement of their conductivity.
2 By titration method.
3 By precipitation method with $\mathrm{Ag} \mathrm{NO}_{3}$.
4 By electrolysis of their aqueous solutions.
AIIMS-2011
COORDINATION COMPOUNDS

274246 The hypothetical complex chloro
diaquatriammine cobalt (III) chloride can be
represented as

1 $\left[\mathrm{CoCl}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2}\right] \mathrm{Cl}_{2}$
2 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right) \mathrm{Cl}_{3}\right]$
3 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right)_{2} \mathrm{Cl}\right]$
4 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{3}\left(\mathrm{H}_{2} \mathrm{O}\right)_{3}\right] \mathrm{Cl}_{3}$
BCECE-2012
COORDINATION COMPOUNDS

274262 The complex ion which has no d-electrons in the central metal atom is

1 $\left[\mathrm{MnO}_{4}\right]$
2 $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}$
3 $\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{3-}$
4 $\left[\mathrm{Cr}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right]^{3+}$
JIPMER-2010
COORDINATION COMPOUNDS

274266 Which among the following statements are true for the complex $\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]\left[\mathrm{Cr}(\mathrm{CN})_{6}\right]$ ?
1.It is a non-electrolyte
2.The magnitude of the charge on each complex ion is 3
3.The complex will not conduct current
4.The complex will exhibit coordination isomerism
5.The magnitude of the charge on each complex ion is 1

1 1 and 4
2 1 and 2
3 1 and 3
4 3 and 5
5 2 and 4
Kerala-CEE-2010