This question was asked in JEE and categorized as hard but it is possible to get the answer within 5 seconds!
Paramagnetic or Diamagnetic Trick:-
- Step 1:- Find total number of electron in given species. (e.g. For NO = 7+8 = 15)
- Step 2:- If it is a odd number, 10, 16 or 32 then it is a paramagnetic species.
- Step 3:- It sum is other than this than it is diamagnetic species.
- Example: no. of electrons in NO are 15 that is odd so NO is paramagnetic.
O2 :- no. of electrons = 8+8=16 so it is Paramagnetic.
S2:- no. of electrons = 16+16=32 so it is Paramagnetic.
N2:- no. of electrons = 7+7=14 so it is diamagnetic.
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