Valence Bond Theory
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CHXII09:COORDINATION COMPOUNDS

322324 The reaction \(\left[\mathrm{Fe}(\mathrm{CNS})_{6}\right]^{3-} \rightarrow\left[\mathrm{FeF}_{6}\right]^{3-}\) takes place with:

1 decrease in magnetic moment
2 increase in coordination number
3 decrease in coordination number
4 increase in magnetic moment
CHXII09:COORDINATION COMPOUNDS

322325 A complex of certain metal has the magnetic moment of 4.91 BM whereas another complex of the same metal with same oxidation state has zero magnetic moment. The metal ion could be

1 \(\mathrm{Co}^{2+}\)
2 \(\mathrm{Mn}^{2+}\)
3 \(\mathrm{Fe}^{2+}\)
4 \(\mathrm{Fe}^{3+}\)
CHXII09:COORDINATION COMPOUNDS

322326 In the octahedral complex \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}\).
I. the cobalt is in +3 oxidation state.
II. it is in \(3 \mathrm{~d}^{6}\) electronic configuration.
III. diamagnetism exists.
Which of these are true? Choose the correct option.

1 I and II
2 II and III
3 I and III
4 I, II and III
CHXII09:COORDINATION COMPOUNDS

322327 The value of 'spin only' magnetic moment, follows the correct order?

1 \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}>\left[\mathrm{MnCl}_{4}\right]^{2-}>\left[\mathrm{CoCl}_{4}\right]^{2-}\)
2 \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}>\left[\mathrm{CoCl}_{4}\right]^{2-}>\left[\mathrm{MnCl}_{4}\right]^{2-}\)
3 \(\left[\mathrm{MnCl}_{4}\right]^{2-}>\left[\mathrm{CoCl}_{4}\right]^{2-}>\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}\)
4 \(\left[\mathrm{MnCl}_{4}\right]^{2-}>\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}>\left[\mathrm{CoCl}_{4}\right]^{2-}\)
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CHXII09:COORDINATION COMPOUNDS

322324 The reaction \(\left[\mathrm{Fe}(\mathrm{CNS})_{6}\right]^{3-} \rightarrow\left[\mathrm{FeF}_{6}\right]^{3-}\) takes place with:

1 decrease in magnetic moment
2 increase in coordination number
3 decrease in coordination number
4 increase in magnetic moment
CHXII09:COORDINATION COMPOUNDS

322325 A complex of certain metal has the magnetic moment of 4.91 BM whereas another complex of the same metal with same oxidation state has zero magnetic moment. The metal ion could be

1 \(\mathrm{Co}^{2+}\)
2 \(\mathrm{Mn}^{2+}\)
3 \(\mathrm{Fe}^{2+}\)
4 \(\mathrm{Fe}^{3+}\)
CHXII09:COORDINATION COMPOUNDS

322326 In the octahedral complex \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}\).
I. the cobalt is in +3 oxidation state.
II. it is in \(3 \mathrm{~d}^{6}\) electronic configuration.
III. diamagnetism exists.
Which of these are true? Choose the correct option.

1 I and II
2 II and III
3 I and III
4 I, II and III
CHXII09:COORDINATION COMPOUNDS

322327 The value of 'spin only' magnetic moment, follows the correct order?

1 \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}>\left[\mathrm{MnCl}_{4}\right]^{2-}>\left[\mathrm{CoCl}_{4}\right]^{2-}\)
2 \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}>\left[\mathrm{CoCl}_{4}\right]^{2-}>\left[\mathrm{MnCl}_{4}\right]^{2-}\)
3 \(\left[\mathrm{MnCl}_{4}\right]^{2-}>\left[\mathrm{CoCl}_{4}\right]^{2-}>\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}\)
4 \(\left[\mathrm{MnCl}_{4}\right]^{2-}>\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}>\left[\mathrm{CoCl}_{4}\right]^{2-}\)
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CHXII09:COORDINATION COMPOUNDS

322324 The reaction \(\left[\mathrm{Fe}(\mathrm{CNS})_{6}\right]^{3-} \rightarrow\left[\mathrm{FeF}_{6}\right]^{3-}\) takes place with:

1 decrease in magnetic moment
2 increase in coordination number
3 decrease in coordination number
4 increase in magnetic moment
CHXII09:COORDINATION COMPOUNDS

322325 A complex of certain metal has the magnetic moment of 4.91 BM whereas another complex of the same metal with same oxidation state has zero magnetic moment. The metal ion could be

1 \(\mathrm{Co}^{2+}\)
2 \(\mathrm{Mn}^{2+}\)
3 \(\mathrm{Fe}^{2+}\)
4 \(\mathrm{Fe}^{3+}\)
CHXII09:COORDINATION COMPOUNDS

322326 In the octahedral complex \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}\).
I. the cobalt is in +3 oxidation state.
II. it is in \(3 \mathrm{~d}^{6}\) electronic configuration.
III. diamagnetism exists.
Which of these are true? Choose the correct option.

1 I and II
2 II and III
3 I and III
4 I, II and III
CHXII09:COORDINATION COMPOUNDS

322327 The value of 'spin only' magnetic moment, follows the correct order?

1 \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}>\left[\mathrm{MnCl}_{4}\right]^{2-}>\left[\mathrm{CoCl}_{4}\right]^{2-}\)
2 \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}>\left[\mathrm{CoCl}_{4}\right]^{2-}>\left[\mathrm{MnCl}_{4}\right]^{2-}\)
3 \(\left[\mathrm{MnCl}_{4}\right]^{2-}>\left[\mathrm{CoCl}_{4}\right]^{2-}>\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}\)
4 \(\left[\mathrm{MnCl}_{4}\right]^{2-}>\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}>\left[\mathrm{CoCl}_{4}\right]^{2-}\)
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CHXII09:COORDINATION COMPOUNDS

322324 The reaction \(\left[\mathrm{Fe}(\mathrm{CNS})_{6}\right]^{3-} \rightarrow\left[\mathrm{FeF}_{6}\right]^{3-}\) takes place with:

1 decrease in magnetic moment
2 increase in coordination number
3 decrease in coordination number
4 increase in magnetic moment
CHXII09:COORDINATION COMPOUNDS

322325 A complex of certain metal has the magnetic moment of 4.91 BM whereas another complex of the same metal with same oxidation state has zero magnetic moment. The metal ion could be

1 \(\mathrm{Co}^{2+}\)
2 \(\mathrm{Mn}^{2+}\)
3 \(\mathrm{Fe}^{2+}\)
4 \(\mathrm{Fe}^{3+}\)
CHXII09:COORDINATION COMPOUNDS

322326 In the octahedral complex \(\left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+}\).
I. the cobalt is in +3 oxidation state.
II. it is in \(3 \mathrm{~d}^{6}\) electronic configuration.
III. diamagnetism exists.
Which of these are true? Choose the correct option.

1 I and II
2 II and III
3 I and III
4 I, II and III
CHXII09:COORDINATION COMPOUNDS

322327 The value of 'spin only' magnetic moment, follows the correct order?

1 \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}>\left[\mathrm{MnCl}_{4}\right]^{2-}>\left[\mathrm{CoCl}_{4}\right]^{2-}\)
2 \(\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}>\left[\mathrm{CoCl}_{4}\right]^{2-}>\left[\mathrm{MnCl}_{4}\right]^{2-}\)
3 \(\left[\mathrm{MnCl}_{4}\right]^{2-}>\left[\mathrm{CoCl}_{4}\right]^{2-}>\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}\)
4 \(\left[\mathrm{MnCl}_{4}\right]^{2-}>\left[\mathrm{Fe}(\mathrm{CN})_{6}\right]^{4-}>\left[\mathrm{CoCl}_{4}\right]^{2-}\)
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