(A) Paramagnetic behaviour is directly proportional to the number of unpaired electrons $(n)$.For the given ions in the presence of the weak field lig

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(A) Paramagnetic behaviour is directly proportional to the number of unpaired electrons $(n)$.For the given ions in the presence of the weak field ligand $H_2O$:$Cr^{2+} (d^4): n = 4$$Mn^{2+} (d^5): n = 5$$Fe^{2+} (d^6): n = 4$$Co^{2+} (d^7): n = 3$Since $Co^{2+}$ has the lowest number of unpaired electrons $(n=3)$,the complex $[Co(H_2O)_6]^{2+}$ will exhibit the lowest paramagnetic behaviour.

Class 12 Chemistry Coordination Compounds Isomerism and Magnetic properties

Difficult

The $d-$ electron configurations of $Cr^{2+}, Mn^{2+}, Fe^{2+}$ and $Co^{2+}$ are $d^4, d^5, d^6$ and $d^7$ respectively. Which one of the following will exhibit the lowest paramagnetic behaviour? (Atomic no. $Cr = 24, Mn = 25, Fe = 26, Co = 27$).

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A
$[Co(H_2O)_6]^{2+}$
B
$[Cr(H_2O)_6]^{2+}$
C
$[Mn(H_2O)_6]^{2+}$
D
$[Fe(H_2O)_6]^{2+}$

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The $d-$electron configurations of $Cr^{2+}, Mn^{2+}, Fe^{2+}$ and $Co^{2+}$ are $d^4, d^5, d^6$ and $d^7$ respectively. Which one of the following will exhibit minimum paramagnetic behaviour?
(At. nos. $Cr = 24, Mn = 25, Fe = 26, Co = 27$)

DifficultAIPMT 2011

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The pair in which both the species have the same magnetic moment (spin only) is :

MediumJEE MAIN 2020

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$A$ magnetic moment of $1.73 \ BM$ will be shown by which of the following?

DifficultNEET 2013

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The calculated spin-only magnetic moments of $[Cr(NH_3)_6]^{3+}$ and $[CuF_6]^{3-}$ in $BM$,respectively,are (Atomic numbers of $Cr$ and $Cu$ are $24$ and $29$,respectively).

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The magnetic moment of a transition metal ion is $3.87 \, B.M$. How many unpaired electrons are present in it?

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The $d-$ electron configurations of $Cr^{2+}, Mn^{2+}, Fe^{2+}$ and $Co^{2+}$ are $d^4, d^5, d^6$ and $d^7$ respectively. Which one of the following will exhibit the lowest paramagnetic behaviour? (Atomic no. $Cr = 24, Mn = 25, Fe = 26, Co = 27$).

Similar Questions

The $d-$electron configurations of $Cr^{2+}, Mn^{2+}, Fe^{2+}$ and $Co^{2+}$ are $d^4, d^5, d^6$ and $d^7$ respectively. Which one of the following will exhibit minimum paramagnetic behaviour?(At. nos. $Cr = 24, Mn = 25, Fe = 26, Co = 27$)

The pair in which both the species have the same magnetic moment (spin only) is :

$A$ magnetic moment of $1.73 \ BM$ will be shown by which of the following?

The calculated spin-only magnetic moments of $[Cr(NH_3)_6]^{3+}$ and $[CuF_6]^{3-}$ in $BM$,respectively,are (Atomic numbers of $Cr$ and $Cu$ are $24$ and $29$,respectively).

The magnetic moment of a transition metal ion is $3.87 \, B.M$. How many unpaired electrons are present in it?

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The $d-$electron configurations of $Cr^{2+}, Mn^{2+}, Fe^{2+}$ and $Co^{2+}$ are $d^4, d^5, d^6$ and $d^7$ respectively. Which one of the following will exhibit minimum paramagnetic behaviour?
(At. nos. $Cr = 24, Mn = 25, Fe = 26, Co = 27$)