28days until NEET 2026Every question counts. โ
๐งช
Did you know?
Hydrogen is the most abundant element in the universe, making up ~75% of all matter.
Match List - I with List - II.
| Column I | Column II |
|---|
(a)[Fe(CN)6โ]3โ | (i) 5.92 BM |
(b)[Fe(H2โO)6โ]3+ | (ii) 0 BM |
(c)[Fe(CN)6โ]4โ | (iii) 4.90 BM |
(d)[Fe(H2โO)6โ]2+ | (iv) 1.73 BM |
hard
Coordination Compounds
2021
chemistry
Explanation
To solve this problem, we need to determine the magnetic moments of the given complexes.The magnetic moment is given by the formula:ฮผ=n(n+2)โ
Our AI powered practice platform can help you achieve your doctor dream.
Practice 2000+ previous year NEET questionsMore practice, more score
AI generated hintsUse hints to get start solving
AI companion chat to clear doubts 24*7Ask any question, get instant answers
AI generated solutionsGet detailed step by step solutions
Check related NCERT contentRead while solving
Track your progressImprove every day
Sign up / Login BM, where
is the number of unpaired electrons.
Let's analyze each complex:
(a)
[Fe(CN)6โ]3โ: โข Iron is in the +3 oxidation state, so
has 5 d-electrons.
โข CN
is a strong field ligand, causing pairing of electrons.
โข All 5 electrons are paired, so
n=0. โข Magnetic moment
ฮผ=0(0+2)โ=0 BM.
(b)
[Fe(H2โO)6โ]3+: โข Iron is in the +3 oxidation state, so
has 5 d-electrons.
โข H
is a weak field ligand, so electrons remain unpaired.
โข There are 5 unpaired electrons, so
n=5. โข Magnetic moment
ฮผ=5(5+2)โ=35โโ5.92 BM.
(c)
[Fe(CN)6โ]4โ: โข Iron is in the +2 oxidation state, so
has 6 d-electrons.
โข CN
is a strong field ligand, causing pairing of electrons.
โข There are no unpaired electrons, so
n=0. โข Magnetic moment
ฮผ=0(0+2)โ=0 BM.
(d)
[Fe(H2โO)6โ]2+: โข Iron is in the +2 oxidation state, so
has 6 d-electrons.
โข H
is a weak field ligand, so electrons remain unpaired.
โข There are 4 unpaired electrons, so
n=4. โข Magnetic moment
ฮผ=4(4+2)โ=24โโ4.90 BM.
Matching the calculated magnetic moments with the given options:
โข (a)
[Fe(CN)6โ]3โโ (ii) 0 BM
โข (b)
[Fe(H2โO)6โ]3+โ (i) 5.92 BM
โข (c)
[Fe(CN)6โ]4โโ (ii) 0 BM
โข (d)
[Fe(H2โO)6โ]2+โ (iii) 4.90 BM
Therefore, the correct option is Option 4:
(a) -> (ii), (b) -> (i), (c) -> (ii), (d) -> (iii).