Class 12 Exam > Class 12 Questions > Statement–1 : In complex [Cr(NH3)4 BrCl...
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Statement–1 : In complex [Cr(NH3)4 BrCl]Cl, the ‘spin only’ magnetic moment is close to 1.73 B.M.
Statement–2 : All known mononuclear complexes of chromium(III), irrespective of the strength of the ligand field, must have three unpaired electrons.
Statement–2 : All known mononuclear complexes of chromium(III), irrespective of the strength of the ligand field, must have three unpaired electrons.
- a)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.
- b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement- 1.
- c)Statement- 1 is True, Statement- 2 is False.
- d)Statement- 1 is False, Statement- 2 is True.
Correct answer is option 'D'. Can you explain this answer?
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Statement–1 : In complex [Cr(NH3)4 BrCl]Cl, the ‘spin only...
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Statement–1 : In complex [Cr(NH3)4 BrCl]Cl, the ‘spin only...
Statement 1: In complex [Cr(NH3)4 BrCl]Cl, the spin only magnetic moment is close to 1.73 B.M.
Statement 2: All known mononuclear complexes of chromium(III), irrespective of the strength of the ligand field, must have three unpaired electrons.
Explanation:
Statement 1: In complex [Cr(NH3)4 BrCl]Cl, the coordination number of chromium is 6, with the ligands being NH3, Br, and Cl. To determine the spin only magnetic moment, we need to know the number of unpaired electrons in the d-orbitals of the chromium ion.
The electronic configuration of Cr(III) ion is [Ar] 3d3. In an octahedral field, the three d-electrons will occupy the lower energy t2g orbitals, leaving three unpaired electrons. The magnetic moment can be calculated using the formula:
Spin only magnetic moment (μ) = √(n(n+2))BM
Where n is the number of unpaired electrons.
In this case, n = 3, so the spin only magnetic moment is √(3(3+2)) = √15 ≈ 3.87 B.M.
Therefore, Statement 1 is False.
Statement 2: All known mononuclear complexes of chromium(III), irrespective of the strength of the ligand field, must have three unpaired electrons.
This statement is True. Chromium(III) ion has three unpaired electrons in its d-orbitals, regardless of the ligand field strength. This is because the electronic configuration of Cr(III) ion is [Ar] 3d3, and the three unpaired electrons occupy the lower energy t2g orbitals in an octahedral field.
Therefore, Statement 2 is True.
Conclusion:
Based on the explanations above, we can conclude that Statement 1 is False and Statement 2 is True. Therefore, the correct answer is option D.
Statement 2: All known mononuclear complexes of chromium(III), irrespective of the strength of the ligand field, must have three unpaired electrons.
Explanation:
Statement 1: In complex [Cr(NH3)4 BrCl]Cl, the coordination number of chromium is 6, with the ligands being NH3, Br, and Cl. To determine the spin only magnetic moment, we need to know the number of unpaired electrons in the d-orbitals of the chromium ion.
The electronic configuration of Cr(III) ion is [Ar] 3d3. In an octahedral field, the three d-electrons will occupy the lower energy t2g orbitals, leaving three unpaired electrons. The magnetic moment can be calculated using the formula:
Spin only magnetic moment (μ) = √(n(n+2))BM
Where n is the number of unpaired electrons.
In this case, n = 3, so the spin only magnetic moment is √(3(3+2)) = √15 ≈ 3.87 B.M.
Therefore, Statement 1 is False.
Statement 2: All known mononuclear complexes of chromium(III), irrespective of the strength of the ligand field, must have three unpaired electrons.
This statement is True. Chromium(III) ion has three unpaired electrons in its d-orbitals, regardless of the ligand field strength. This is because the electronic configuration of Cr(III) ion is [Ar] 3d3, and the three unpaired electrons occupy the lower energy t2g orbitals in an octahedral field.
Therefore, Statement 2 is True.
Conclusion:
Based on the explanations above, we can conclude that Statement 1 is False and Statement 2 is True. Therefore, the correct answer is option D.
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Statement–1 : In complex [Cr(NH3)4 BrCl]Cl, the ‘spin only’ magnetic moment is close to 1.73 B.M.Statement–2 : All known mononuclear complexes of chromium(III), irrespective of the strength of the ligand field, must have three unpaired electrons.a)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement- 1.c)Statement- 1 is True, Statement- 2 is False.d)Statement- 1 is False, Statement- 2 is True.Correct answer is option 'D'. Can you explain this answer?
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Statement–1 : In complex [Cr(NH3)4 BrCl]Cl, the ‘spin only’ magnetic moment is close to 1.73 B.M.Statement–2 : All known mononuclear complexes of chromium(III), irrespective of the strength of the ligand field, must have three unpaired electrons.a)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement- 1.c)Statement- 1 is True, Statement- 2 is False.d)Statement- 1 is False, Statement- 2 is True.Correct answer is option 'D'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Statement–1 : In complex [Cr(NH3)4 BrCl]Cl, the ‘spin only’ magnetic moment is close to 1.73 B.M.Statement–2 : All known mononuclear complexes of chromium(III), irrespective of the strength of the ligand field, must have three unpaired electrons.a)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement- 1.c)Statement- 1 is True, Statement- 2 is False.d)Statement- 1 is False, Statement- 2 is True.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Statement–1 : In complex [Cr(NH3)4 BrCl]Cl, the ‘spin only’ magnetic moment is close to 1.73 B.M.Statement–2 : All known mononuclear complexes of chromium(III), irrespective of the strength of the ligand field, must have three unpaired electrons.a)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement- 1.c)Statement- 1 is True, Statement- 2 is False.d)Statement- 1 is False, Statement- 2 is True.Correct answer is option 'D'. Can you explain this answer?.
Statement–1 : In complex [Cr(NH3)4 BrCl]Cl, the ‘spin only’ magnetic moment is close to 1.73 B.M.Statement–2 : All known mononuclear complexes of chromium(III), irrespective of the strength of the ligand field, must have three unpaired electrons.a)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement- 1.c)Statement- 1 is True, Statement- 2 is False.d)Statement- 1 is False, Statement- 2 is True.Correct answer is option 'D'. Can you explain this answer? for Class 12 2024 is part of Class 12 preparation. The Question and answers have been prepared according to the Class 12 exam syllabus. Information about Statement–1 : In complex [Cr(NH3)4 BrCl]Cl, the ‘spin only’ magnetic moment is close to 1.73 B.M.Statement–2 : All known mononuclear complexes of chromium(III), irrespective of the strength of the ligand field, must have three unpaired electrons.a)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement- 1.c)Statement- 1 is True, Statement- 2 is False.d)Statement- 1 is False, Statement- 2 is True.Correct answer is option 'D'. Can you explain this answer? covers all topics & solutions for Class 12 2024 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Statement–1 : In complex [Cr(NH3)4 BrCl]Cl, the ‘spin only’ magnetic moment is close to 1.73 B.M.Statement–2 : All known mononuclear complexes of chromium(III), irrespective of the strength of the ligand field, must have three unpaired electrons.a)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement- 1.c)Statement- 1 is True, Statement- 2 is False.d)Statement- 1 is False, Statement- 2 is True.Correct answer is option 'D'. Can you explain this answer?.
Solutions for Statement–1 : In complex [Cr(NH3)4 BrCl]Cl, the ‘spin only’ magnetic moment is close to 1.73 B.M.Statement–2 : All known mononuclear complexes of chromium(III), irrespective of the strength of the ligand field, must have three unpaired electrons.a)Statement- 1 is True, Statement- 2 is True; Statement- 2 is a correct explanationfor Statement- 1.b)Statement- 1 is True, Statement- 2 is True; Statement- 2 is NOT a correct explanationfor Statement- 1.c)Statement- 1 is True, Statement- 2 is False.d)Statement- 1 is False, Statement- 2 is True.Correct answer is option 'D'. Can you explain this answer? in English & in Hindi are available as part of our courses for Class 12.
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