Which one is paramagnetic from the following

[IIT 1989; CBSE PMT 1995]

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Both (a) and (b)

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CN−

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Solution

The correct option is C Both (a) and (b)
$O_{2}^{-} (2 \times 8 + 1 = 17)$ as odd number of electrons and hence it is paramagnetic. All the remaining molecules/ions, i.e.,
$C N^{-} (6 + 7 + 1 = 14)$ diamagnetic

NO(7+8=15) has odd number of electrons and hence it is paramagnetic.

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Q. Which one is paramagnetic from the following

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Which one is paramagnetic from the following [IIT 1989; CBSE PMT 1995]

The correct option is C Both (a) and (b)O−2(2×8+1=17) as odd number of electrons and hence it is paramagnetic. All the remaining molecules/ions, i.e., CN−(6+7+1=14) diamagnetic NO(7+8=15) has odd number of electrons and hence it is paramagnetic.

Which one is paramagnetic from the following

[IIT 1989; CBSE PMT 1995]

The correct option is C Both (a) and (b)
$O_{2}^{-} (2 \times 8 + 1 = 17)$ as odd number of electrons and hence it is paramagnetic. All the remaining molecules/ions, i.e.,
$C N^{-} (6 + 7 + 1 = 14)$ diamagnetic

NO(7+8=15) has odd number of electrons and hence it is paramagnetic.