Stability of Coordination Compounds
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CHXII09:COORDINATION COMPOUNDS

322121 Which of the following statements is incorrect?

1 Greater the stability constant of a complex ion, greater is its stability.
2 Greater the charge on the central metal ion, greater is the stability of the complex.
3 Greater the basic character of the ligand, the greater is the stability of the complex.
4 Complexes have low stability constants.
CHXII09:COORDINATION COMPOUNDS

322122 In a complex \({\rm{M}}{{\rm{L}}_{\rm{2}}}\), stepwise formation constants for
\({\text{M + L}} \rightleftharpoons {\text{ML}}\)
\({\text{ML + L}} \rightleftharpoons {\text{M}}{{\text{L}}_{\text{2}}}\)
are 4 and 3 . Hence, overall stability constant for the reaction, \(M+2 L \rightleftharpoons M L_{2}\) is,

1 12
2 7
3 1.33
4 0.75
CHXII09:COORDINATION COMPOUNDS

322123 Assertion :
EDTA forms complex with divalent metals of \(3 \mathrm{~d}\)-series in the ratio of \(1: 1\).
Reason :
EDTA has four \(-\mathrm{COO}^{\oplus}\) groups.

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

322124 The most stable complex among the following is

1 \(\left[\mathrm{Pd}(\mathrm{CN})_{4}\right]^{4-}\)
2 \(\left[\mathrm{Fe}(\mathrm{CO})_{5}\right]\)
3 \(\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{4-}\)
4 \(\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{3-}\)
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CHXII09:COORDINATION COMPOUNDS

322121 Which of the following statements is incorrect?

1 Greater the stability constant of a complex ion, greater is its stability.
2 Greater the charge on the central metal ion, greater is the stability of the complex.
3 Greater the basic character of the ligand, the greater is the stability of the complex.
4 Complexes have low stability constants.
CHXII09:COORDINATION COMPOUNDS

322122 In a complex \({\rm{M}}{{\rm{L}}_{\rm{2}}}\), stepwise formation constants for
\({\text{M + L}} \rightleftharpoons {\text{ML}}\)
\({\text{ML + L}} \rightleftharpoons {\text{M}}{{\text{L}}_{\text{2}}}\)
are 4 and 3 . Hence, overall stability constant for the reaction, \(M+2 L \rightleftharpoons M L_{2}\) is,

1 12
2 7
3 1.33
4 0.75
CHXII09:COORDINATION COMPOUNDS

322123 Assertion :
EDTA forms complex with divalent metals of \(3 \mathrm{~d}\)-series in the ratio of \(1: 1\).
Reason :
EDTA has four \(-\mathrm{COO}^{\oplus}\) groups.

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

322124 The most stable complex among the following is

1 \(\left[\mathrm{Pd}(\mathrm{CN})_{4}\right]^{4-}\)
2 \(\left[\mathrm{Fe}(\mathrm{CO})_{5}\right]\)
3 \(\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{4-}\)
4 \(\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{3-}\)
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CHXII09:COORDINATION COMPOUNDS

322121 Which of the following statements is incorrect?

1 Greater the stability constant of a complex ion, greater is its stability.
2 Greater the charge on the central metal ion, greater is the stability of the complex.
3 Greater the basic character of the ligand, the greater is the stability of the complex.
4 Complexes have low stability constants.
CHXII09:COORDINATION COMPOUNDS

322122 In a complex \({\rm{M}}{{\rm{L}}_{\rm{2}}}\), stepwise formation constants for
\({\text{M + L}} \rightleftharpoons {\text{ML}}\)
\({\text{ML + L}} \rightleftharpoons {\text{M}}{{\text{L}}_{\text{2}}}\)
are 4 and 3 . Hence, overall stability constant for the reaction, \(M+2 L \rightleftharpoons M L_{2}\) is,

1 12
2 7
3 1.33
4 0.75
CHXII09:COORDINATION COMPOUNDS

322123 Assertion :
EDTA forms complex with divalent metals of \(3 \mathrm{~d}\)-series in the ratio of \(1: 1\).
Reason :
EDTA has four \(-\mathrm{COO}^{\oplus}\) groups.

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

322124 The most stable complex among the following is

1 \(\left[\mathrm{Pd}(\mathrm{CN})_{4}\right]^{4-}\)
2 \(\left[\mathrm{Fe}(\mathrm{CO})_{5}\right]\)
3 \(\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{4-}\)
4 \(\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{3-}\)
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CHXII09:COORDINATION COMPOUNDS

322121 Which of the following statements is incorrect?

1 Greater the stability constant of a complex ion, greater is its stability.
2 Greater the charge on the central metal ion, greater is the stability of the complex.
3 Greater the basic character of the ligand, the greater is the stability of the complex.
4 Complexes have low stability constants.
CHXII09:COORDINATION COMPOUNDS

322122 In a complex \({\rm{M}}{{\rm{L}}_{\rm{2}}}\), stepwise formation constants for
\({\text{M + L}} \rightleftharpoons {\text{ML}}\)
\({\text{ML + L}} \rightleftharpoons {\text{M}}{{\text{L}}_{\text{2}}}\)
are 4 and 3 . Hence, overall stability constant for the reaction, \(M+2 L \rightleftharpoons M L_{2}\) is,

1 12
2 7
3 1.33
4 0.75
CHXII09:COORDINATION COMPOUNDS

322123 Assertion :
EDTA forms complex with divalent metals of \(3 \mathrm{~d}\)-series in the ratio of \(1: 1\).
Reason :
EDTA has four \(-\mathrm{COO}^{\oplus}\) groups.

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

322124 The most stable complex among the following is

1 \(\left[\mathrm{Pd}(\mathrm{CN})_{4}\right]^{4-}\)
2 \(\left[\mathrm{Fe}(\mathrm{CO})_{5}\right]\)
3 \(\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{4-}\)
4 \(\left[\mathrm{Ni}(\mathrm{CN})_{4}\right]^{3-}\)
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