Questions

Column I Column II
a- ${Fe}^{2 +}$ p- Set of quantum no. for last $e^{-}$ is $n = 2, l = 1$ $m = 1, s = + \frac{1}{2}$
b- ${Mn}^{+ 4}$ q- Magnetic moment $(μ) = zero$
c- ${Zn}^{+ 2}$ r- Spin multiplicity (SM)=4
d- ${Na}^{+}$ s- Total no. of exchange pairs in 3d-subshell =10
t-Paramagnetic species

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[a-s, t); (b-r, t), (c-q); (d-p, q)

[a-s, t); (b-r, t), (c-q); (d- q)

[a-s); (b-r, t), (c-q); (d-p)

[a-s, t); (b-r), (c-p); (d-p, q)

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detailed solution

Correct option is A

For ${Fe}^{2 +}$ total no. of exchange pairs in 3d-subshell is equal to 10 and it is a Paramagnetic species.

For ${Mn}^{+ 4}$ the magnetic moment is equal to zero and its nature is paramagnetic species.
For ${Zn}^{+ 2}$ the magnetic moment is equal to zero

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Column I	Column II
a- ${Fe}^{2 +}$	p- Set of quantum no. for last $e^{-}$ is $n = 2, l = 1$ $m = 1, s = + \frac{1}{2}$
b- ${Mn}^{+ 4}$	q- Magnetic moment $(μ) = zero$
c- ${Zn}^{+ 2}$	r- Spin multiplicity (SM)=4
d- ${Na}^{+}$	s- Total no. of exchange pairs in 3d-subshell =10
	t-Paramagnetic species

Column IColumn IIa- Fe2+p- Set of quantum no. for last e- is n=2,l=1 m=1,s=+12b- Mn+4q- Magnetic moment (μ)= zero c-Zn+2r- Spin multiplicity (SM)=4d-Na+s- Total no. of exchange pairs in 3d-subshell =10 t-Paramagnetic species