Valence Bond Theory
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CHXII09:COORDINATION COMPOUNDS

322298 Assertion :
\(\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}\) has square planar and
\(\left[\mathrm{NiCl}_{4}\right]^{2-}\) has tetrahedral shape.
Reason :
\(\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}\) is diamagnetic while
\(\left[\mathrm{NiCl}_{4}\right]^{2-}\) is paramagnetic.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII09:COORDINATION COMPOUNDS

322299 Assertion :
\(\mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]\) is diamagnetic and \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{3}\) is paramagnetic.
Reason :
Hybridisation of central metal in \(\mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]\) is \(\mathrm{sp}^{3} \mathrm{~d}^{2}\), while in\(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{3}\) is \(\mathrm{d}^{2} \mathrm{sp}^{3}\).

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and reason is incorrect.
AIIMS - 2009
CHXII09:COORDINATION COMPOUNDS

322300 Assertion :
\(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{NO}_{3} \mathrm{SO}_{4}\right.\) is
paramagnetic.
Reason :
The \(\mathrm{Fe}\) in \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{NO}_{3} \mathrm{SO}_{4}\right.\) has three unpaired electrons.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII09:COORDINATION COMPOUNDS

322301 Nickel \(({\rm{Z}} = 28)\) combines with a uninegative monodentate ligand \(\mathrm{X}^{-}\)to form a paramagnetic complex \(\left[\mathrm{NiX}_{4}\right]^{2-}\). The number of unpaired electrons in the nickel and geometry of this complex ion are, respectively

1 One and tetrahedral
2 Two and tetrahedral
3 One and square planar
4 Two and square planar
CHXII09:COORDINATION COMPOUNDS

322302 Which of the following is not expected to show paramagnetism?

1 \(\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)\right]^{2+}\)
2 \(\mathrm{Ni}(\mathrm{CO})_{4}\)
3 \(\left[\mathrm{Ni}\left(\mathrm{NH}_{3}\right)_{4}\right]^{2+}\)
4 \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+}\)
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CHXII09:COORDINATION COMPOUNDS

322298 Assertion :
\(\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}\) has square planar and
\(\left[\mathrm{NiCl}_{4}\right]^{2-}\) has tetrahedral shape.
Reason :
\(\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}\) is diamagnetic while
\(\left[\mathrm{NiCl}_{4}\right]^{2-}\) is paramagnetic.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII09:COORDINATION COMPOUNDS

322299 Assertion :
\(\mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]\) is diamagnetic and \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{3}\) is paramagnetic.
Reason :
Hybridisation of central metal in \(\mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]\) is \(\mathrm{sp}^{3} \mathrm{~d}^{2}\), while in\(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{3}\) is \(\mathrm{d}^{2} \mathrm{sp}^{3}\).

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and reason is incorrect.
AIIMS - 2009
CHXII09:COORDINATION COMPOUNDS

322300 Assertion :
\(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{NO}_{3} \mathrm{SO}_{4}\right.\) is
paramagnetic.
Reason :
The \(\mathrm{Fe}\) in \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{NO}_{3} \mathrm{SO}_{4}\right.\) has three unpaired electrons.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII09:COORDINATION COMPOUNDS

322301 Nickel \(({\rm{Z}} = 28)\) combines with a uninegative monodentate ligand \(\mathrm{X}^{-}\)to form a paramagnetic complex \(\left[\mathrm{NiX}_{4}\right]^{2-}\). The number of unpaired electrons in the nickel and geometry of this complex ion are, respectively

1 One and tetrahedral
2 Two and tetrahedral
3 One and square planar
4 Two and square planar
CHXII09:COORDINATION COMPOUNDS

322302 Which of the following is not expected to show paramagnetism?

1 \(\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)\right]^{2+}\)
2 \(\mathrm{Ni}(\mathrm{CO})_{4}\)
3 \(\left[\mathrm{Ni}\left(\mathrm{NH}_{3}\right)_{4}\right]^{2+}\)
4 \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+}\)
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CHXII09:COORDINATION COMPOUNDS

322298 Assertion :
\(\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}\) has square planar and
\(\left[\mathrm{NiCl}_{4}\right]^{2-}\) has tetrahedral shape.
Reason :
\(\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}\) is diamagnetic while
\(\left[\mathrm{NiCl}_{4}\right]^{2-}\) is paramagnetic.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII09:COORDINATION COMPOUNDS

322299 Assertion :
\(\mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]\) is diamagnetic and \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{3}\) is paramagnetic.
Reason :
Hybridisation of central metal in \(\mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]\) is \(\mathrm{sp}^{3} \mathrm{~d}^{2}\), while in\(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{3}\) is \(\mathrm{d}^{2} \mathrm{sp}^{3}\).

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and reason is incorrect.
AIIMS - 2009
CHXII09:COORDINATION COMPOUNDS

322300 Assertion :
\(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{NO}_{3} \mathrm{SO}_{4}\right.\) is
paramagnetic.
Reason :
The \(\mathrm{Fe}\) in \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{NO}_{3} \mathrm{SO}_{4}\right.\) has three unpaired electrons.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII09:COORDINATION COMPOUNDS

322301 Nickel \(({\rm{Z}} = 28)\) combines with a uninegative monodentate ligand \(\mathrm{X}^{-}\)to form a paramagnetic complex \(\left[\mathrm{NiX}_{4}\right]^{2-}\). The number of unpaired electrons in the nickel and geometry of this complex ion are, respectively

1 One and tetrahedral
2 Two and tetrahedral
3 One and square planar
4 Two and square planar
CHXII09:COORDINATION COMPOUNDS

322302 Which of the following is not expected to show paramagnetism?

1 \(\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)\right]^{2+}\)
2 \(\mathrm{Ni}(\mathrm{CO})_{4}\)
3 \(\left[\mathrm{Ni}\left(\mathrm{NH}_{3}\right)_{4}\right]^{2+}\)
4 \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+}\)
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CHXII09:COORDINATION COMPOUNDS

322298 Assertion :
\(\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}\) has square planar and
\(\left[\mathrm{NiCl}_{4}\right]^{2-}\) has tetrahedral shape.
Reason :
\(\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}\) is diamagnetic while
\(\left[\mathrm{NiCl}_{4}\right]^{2-}\) is paramagnetic.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII09:COORDINATION COMPOUNDS

322299 Assertion :
\(\mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]\) is diamagnetic and \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{3}\) is paramagnetic.
Reason :
Hybridisation of central metal in \(\mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]\) is \(\mathrm{sp}^{3} \mathrm{~d}^{2}\), while in\(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{3}\) is \(\mathrm{d}^{2} \mathrm{sp}^{3}\).

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and reason is incorrect.
AIIMS - 2009
CHXII09:COORDINATION COMPOUNDS

322300 Assertion :
\(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{NO}_{3} \mathrm{SO}_{4}\right.\) is
paramagnetic.
Reason :
The \(\mathrm{Fe}\) in \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{NO}_{3} \mathrm{SO}_{4}\right.\) has three unpaired electrons.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII09:COORDINATION COMPOUNDS

322301 Nickel \(({\rm{Z}} = 28)\) combines with a uninegative monodentate ligand \(\mathrm{X}^{-}\)to form a paramagnetic complex \(\left[\mathrm{NiX}_{4}\right]^{2-}\). The number of unpaired electrons in the nickel and geometry of this complex ion are, respectively

1 One and tetrahedral
2 Two and tetrahedral
3 One and square planar
4 Two and square planar
CHXII09:COORDINATION COMPOUNDS

322302 Which of the following is not expected to show paramagnetism?

1 \(\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)\right]^{2+}\)
2 \(\mathrm{Ni}(\mathrm{CO})_{4}\)
3 \(\left[\mathrm{Ni}\left(\mathrm{NH}_{3}\right)_{4}\right]^{2+}\)
4 \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+}\)
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CHXII09:COORDINATION COMPOUNDS

322298 Assertion :
\(\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}\) has square planar and
\(\left[\mathrm{NiCl}_{4}\right]^{2-}\) has tetrahedral shape.
Reason :
\(\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{2-}\) is diamagnetic while
\(\left[\mathrm{NiCl}_{4}\right]^{2-}\) is paramagnetic.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII09:COORDINATION COMPOUNDS

322299 Assertion :
\(\mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]\) is diamagnetic and \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{3}\) is paramagnetic.
Reason :
Hybridisation of central metal in \(\mathrm{K}_{4}\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]\) is \(\mathrm{sp}^{3} \mathrm{~d}^{2}\), while in\(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{6}\right] \mathrm{Cl}_{3}\) is \(\mathrm{d}^{2} \mathrm{sp}^{3}\).

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Both Assertion and reason is incorrect.
AIIMS - 2009
CHXII09:COORDINATION COMPOUNDS

322300 Assertion :
\(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{NO}_{3} \mathrm{SO}_{4}\right.\) is
paramagnetic.
Reason :
The \(\mathrm{Fe}\) in \(\left[\mathrm{Fe}\left(\mathrm{H}_{2} \mathrm{O}\right)_{5} \mathrm{NO}_{3} \mathrm{SO}_{4}\right.\) has three unpaired electrons.

1 Both Assertion and Reason are correct and Reason is the correct explanation of the Assertion.
2 Both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion.
3 Assertion is correct but Reason is incorrect.
4 Assertion is incorrect but Reason is correct.
CHXII09:COORDINATION COMPOUNDS

322301 Nickel \(({\rm{Z}} = 28)\) combines with a uninegative monodentate ligand \(\mathrm{X}^{-}\)to form a paramagnetic complex \(\left[\mathrm{NiX}_{4}\right]^{2-}\). The number of unpaired electrons in the nickel and geometry of this complex ion are, respectively

1 One and tetrahedral
2 Two and tetrahedral
3 One and square planar
4 Two and square planar
CHXII09:COORDINATION COMPOUNDS

322302 Which of the following is not expected to show paramagnetism?

1 \(\left[\mathrm{Ni}\left(\mathrm{H}_{2} \mathrm{O}\right)\right]^{2+}\)
2 \(\mathrm{Ni}(\mathrm{CO})_{4}\)
3 \(\left[\mathrm{Ni}\left(\mathrm{NH}_{3}\right)_{4}\right]^{2+}\)
4 \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{2+}\)