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The correct order of magnetic moments (spin only values in BM) among the following is
(atomic number of Mn = 25, Fe = 26, Co = 27)
(AIEEE 2004)
  • a)
    [MnCl4]2- > [CoCl4]2- > [Fe(CN)6]4-
  • b)
    [MnCl4]2- >  [Fe(CN)6]4- >  [CoCl4]2-  
  • c)
    [Fe(CN)6]4- > [MnCl4]2- > [CoCl4]2-
  • d)
    [Fe(CN)6]4- > [CoCl4]2- > [MnCl4]2-
Correct answer is option 'A'. Can you explain this answer?
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The correct order of magnetic moments (spin only values in BM) among t...
Number of unpaired electrons in [Fe(CN)6]4- is zero.
Thus, magnetic moment =
(n = unpaired electrons)
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The correct order of magnetic moments (spin only values in BM) among t...
Spin only magnetic moment calculation

The spin-only magnetic moment of a complex can be calculated by using the formula:

μ = √n(n + 2) BM

Where n is the number of unpaired electrons in the complex.

Solution

To determine the correct order of magnetic moments, we need to calculate the number of unpaired electrons for each complex.

a) [MnCl4]2-

Mn has 5 unpaired electrons in its ground state, but in the complex, it loses one electron to form [MnCl4]2-. Therefore, the number of unpaired electrons is 4.

μ = √4(4 + 2) = 4 BM

b) [Fe(CN)6]4-

Fe has 4 unpaired electrons in its ground state, but in the complex, it gains 2 electrons to form [Fe(CN)6]4-. Therefore, the number of unpaired electrons is 2.

μ = √2(2 + 2) = 2.83 BM

c) [Fe(CN)6]4-

Co has 3 unpaired electrons in its ground state, but in the complex, it loses one electron to form [CoCl4]2-. Therefore, the number of unpaired electrons is 2.

μ = √2(2 + 2) = 2.83 BM

d) [Fe(CN)6]4-

Fe has 4 unpaired electrons in its ground state, but in the complex, it loses 4 electrons to form [CoCl4]2-. Therefore, the number of unpaired electrons is 0.

μ = √0(0 + 2) = 0 BM

Therefore, the correct order of magnetic moments is:

a) [MnCl4]2- (4 BM)
b) [Fe(CN)6]4- (2.83 BM)
c) [CoCl4]2- (2.83 BM)
d) [Fe(CN)6]4- (0 BM)

Hence, the correct answer is option 'A'.
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Read the following text and answer the following questions on the basis of the same:Earth’s magnetism: Earth’s magnetic field is caused by a dynamo effect. The effect works in the same way as a dynamo light on a bicycle. Magnets in the dynamo start spinning when the bicycle is pedaled, creating an electric current. The electricity is then used to turn on the light. This process also works in reverse. If you have a rotating electric current, it will create a magnetic field. On Earth, flowing liquid metal in the outer core of the planet generates electric currents. The rotation of Earth on its axis causes these electric currents to form a magnetic field which extends around the planet. The average magnetic field strength in the Earth's outer core was measured to be 25 Gauss, 50 times stronger than the magnetic field at the surface. The magnetic field is extremely important for sustaining life on Earth. Without it, we would be exposed to high amounts of radiation from the Sun and our atmosphere would be free to leak into space. This is likely what happened to the atmosphere on Mars. As Mars doesn’t have flowing liquid metal in its core, it doesn’t produce the same dynamo effect. This left the planet with a very weak magnetic field, allowing for its atmosphere to be stripped away by solar winds, leaving it uninhabitable. Based upon the study of lava flows throughout the world, it has been proposed that the Earth's magnetic field reverses at an average interval of approximately 300,000 years. However, the last such event occurred some 780,000 years ago.Which of the followings is the reason for Earth’s magnetism?

The correct order of magnetic moments (spin only values in BM) among the following is(atomic number of Mn = 25, Fe = 26, Co = 27)(AIEEE 2004)a)[MnCl4]2->[CoCl4]2- >[Fe(CN)6]4-b)[MnCl4]2->[Fe(CN)6]4- >[CoCl4]2- c)[Fe(CN)6]4- >[MnCl4]2->[CoCl4]2-d)[Fe(CN)6]4- >[CoCl4]2->[MnCl4]2-Correct answer is option 'A'. Can you explain this answer?
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The correct order of magnetic moments (spin only values in BM) among the following is(atomic number of Mn = 25, Fe = 26, Co = 27)(AIEEE 2004)a)[MnCl4]2->[CoCl4]2- >[Fe(CN)6]4-b)[MnCl4]2->[Fe(CN)6]4- >[CoCl4]2- c)[Fe(CN)6]4- >[MnCl4]2->[CoCl4]2-d)[Fe(CN)6]4- >[CoCl4]2->[MnCl4]2-Correct answer is option 'A'. 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 The correct order of magnetic moments (spin only values in BM) among the following is(atomic number of Mn = 25, Fe = 26, Co = 27)(AIEEE 2004)a)[MnCl4]2->[CoCl4]2- >[Fe(CN)6]4-b)[MnCl4]2->[Fe(CN)6]4- >[CoCl4]2- c)[Fe(CN)6]4- >[MnCl4]2->[CoCl4]2-d)[Fe(CN)6]4- >[CoCl4]2->[MnCl4]2-Correct answer is option 'A'. 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 The correct order of magnetic moments (spin only values in BM) among the following is(atomic number of Mn = 25, Fe = 26, Co = 27)(AIEEE 2004)a)[MnCl4]2->[CoCl4]2- >[Fe(CN)6]4-b)[MnCl4]2->[Fe(CN)6]4- >[CoCl4]2- c)[Fe(CN)6]4- >[MnCl4]2->[CoCl4]2-d)[Fe(CN)6]4- >[CoCl4]2->[MnCl4]2-Correct answer is option 'A'. Can you explain this answer?.
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