Stability of Coordination Compounds
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 ML2, stepwise formation constants for
M + LML
ML + LML2
are 4 and 3 . Hence, overall stability constant for the reaction, M+2LML2 is,

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

322123 Assertion :
EDTA forms complex with divalent metals of 3 d-series in the ratio of 1:1.
Reason :
EDTA has four COO 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 [Pd(CN)4]4
2 [Fe(CO)5]
3 [Ni(CN)4]4
4 [Ni(CN)4]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 ML2, stepwise formation constants for
M + LML
ML + LML2
are 4 and 3 . Hence, overall stability constant for the reaction, M+2LML2 is,

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

322123 Assertion :
EDTA forms complex with divalent metals of 3 d-series in the ratio of 1:1.
Reason :
EDTA has four COO 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 [Pd(CN)4]4
2 [Fe(CO)5]
3 [Ni(CN)4]4
4 [Ni(CN)4]3
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 ML2, stepwise formation constants for
M + LML
ML + LML2
are 4 and 3 . Hence, overall stability constant for the reaction, M+2LML2 is,

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

322123 Assertion :
EDTA forms complex with divalent metals of 3 d-series in the ratio of 1:1.
Reason :
EDTA has four COO 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 [Pd(CN)4]4
2 [Fe(CO)5]
3 [Ni(CN)4]4
4 [Ni(CN)4]3
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 ML2, stepwise formation constants for
M + LML
ML + LML2
are 4 and 3 . Hence, overall stability constant for the reaction, M+2LML2 is,

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

322123 Assertion :
EDTA forms complex with divalent metals of 3 d-series in the ratio of 1:1.
Reason :
EDTA has four COO 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 [Pd(CN)4]4
2 [Fe(CO)5]
3 [Ni(CN)4]4
4 [Ni(CN)4]3