Multiple Choice QuestionsWhich of the following is paramagnetic ?
N2
C2
N2+
O22-
C.
N2+
C2 ➔ the molecular orbital configuration (12) is
➔ C2 = [(1s)2 (1s)2 (2s)2 (2s)2 (2py)2 (2pz)2]
C2 molecule is diamagnetic as it does not contain any unpaired electron
N2 ➔ the molecular orbital configuration (14) is
➔ N2 = [(1s)2 (1s)2 (2s)2 (2s)2 (2py)2 (2pz)2 (2px)2]
N2 molecule is diamagnetic because it does not contain any unpaired electron .
N2+ ➔ the molecular orbital configuration (13) is
➔ N2+ = [(1s)2 (1s)2 (2s)2 (2s)2 (2py)2 (2pz)2 (2px)1]
N2+ molecule is paramagnetic because it contain one unpaired electron .
O22- ➔ the molecular orbital configuration (18) is
➔ O22- = [(1s)2 (1s)2 (2s)2 (2s)2 (2px)2 (2py)2 (2pz)2 (2py)2 (2pz)2]
It does not contain any unpaired electron so , it is diamagnetic .
Assertion : SeCl4 does not have a tetrahedral structure.
Reason : Se in SeCl4 has two lone pairs.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
Assertion : Molecular nitrogen is less reactive than molecular oxygen.
Reason : The bond length of N2 is shorter than that of oxygen.
If both assertion and reason are true and reason is the correct explanation of assertion.
If both assertion and reason are true but reason is not the correct explanation of assertion.
If assertion is true but reason is false.
If both assertion and reason are false.
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