Q.62. Match List - I with List - II.
List - I: Chromium (III) Complexes (en = ethylene diamine)
A. [

Q: What is the correct answer for this exam Chemistry Q62?

The correct answer is D. Sol. The crystal field splitting energy ($\Delta_o$) is proportional to the strength of the ligand. According to the spectrochemical series, the order of ligand strength is: CN⁻ > en > H₂O > F⁻ Therefore, the order of $\Delta_o$ values for the given complexes should be: [Cr(CN)₆]³⁻ > [Cr(en)₃]³⁺ > [Cr(H₂O)₆]³⁺ > [CrF₆]³⁻ Matching the complexes to the given $\Delta_o$ values: [Cr(CN)₆]³⁻ (stronges

Q: Q.62. Match List - I with List - II. List - I: Chromium (III) Complexes (en = ethylene diamine) A. [Cr(CN)₆]³⁻ B. [CrF₆]³⁻ C. [Cr(H₂O)₆]³⁺ D. [Cr(en)₃]³⁺ List - II: (cm⁻¹) I. 15,060 II. 17,400 III.…

The correct answer is D. Sol. The crystal field splitting energy ($\Delta_o$) is proportional to the strength of the ligand. According to the spectrochemical series, the order of ligand strength is: CN⁻ > en > H₂O > F⁻ Therefore, the order of $\Delta_o$ values for the given complexes should be: [Cr(CN)₆]³⁻ > [Cr(en)₃]³⁺ > [Cr(H₂O)₆]³⁺ > [CrF₆]³⁻ Matching the complexes to the given $\Delta_o$ values: [Cr(CN)₆]³⁻ (stronges

Q: What are the options for this this exam Chemistry question?

A. A-I, B-II, C-III, D-IV · B. A-II, B-III, C-IV, D-I · C. A-III, B-IV, C-I, D-II · D. A-IV, B-I, C-II, D-III

Question

Q.62. Match List - I with List - II.
List - I: Chromium (III) Complexes (en = ethylene diamine)
A. [Cr(CN)₆]³⁻
B. [CrF₆]³⁻
C. [Cr(H₂O)₆]³⁺
D. [Cr(en)₃]³⁺
List - II:  (cm⁻¹)
I. 15,060
II. 17,400
III. 22,300
IV. 26,600
Choose the correct answer from the options given below:

FirstInTest · Accepted Answer

Sol. The crystal field splitting energy ($\Delta_o$) is proportional to the strength of the ligand. According to the spectrochemical series, the order of ligand strength is:
CN⁻ > en > H₂O > F⁻
Therefore, the order of $\Delta_o$ values for the given complexes should be:
[Cr(CN)₆]³⁻ > [Cr(en)₃]³⁺ > [Cr(H₂O)₆]³⁺ > [CrF₆]³⁻

Matching the complexes to the given $\Delta_o$ values:
[Cr(CN)₆]³⁻ (strongest ligand) should have the highest $\Delta_o$ value: 26,600 cm⁻¹ (IV)
[Cr(en)₃]³⁺ (stronger than H₂O, weaker than CN) should have the next highest: 22,300 cm⁻¹ (III)
[Cr(H₂O)₆]³⁺ (weaker than en) should have the next: 17,400 cm⁻¹ (II)
[CrF₆]³⁻ (weakest ligand) should have the lowest $\Delta_o$ value: 15,060 cm⁻¹ (I)

So, the matching is:
A - IV
B - I
C - II
D - III

Let's check the options:
(1) A-I, B-II, C-III, D-IV
(2) A-II, B-III, C-IV, D-I
(3) A-III, B-IV, C-I, D-II
(4) A-IV, B-I, C-II, D-III - This matches our derived order.

Answer

A-I, B-II, C-III, D-IV

Answer

A-II, B-III, C-IV, D-I

Answer

A-III, B-IV, C-I, D-II

Answer

A-IV, B-I, C-II, D-III

Related Questionsin Chemistry

Browse Engineering Questions by Subject

Practice Other Engineering Exams

Practice More Engineering Questions