Which of the following statements is WRONG?
The bond order of He2is zero;so He2,molecule is unstable.
Li2 molecule is diamagnetic.
O2 molecule contains two unpaired electron and is paramagnetic.
C2 molecule is paramagnetic in vapour phase.
H2 molecule has no unpaired electrons.
The Correct Option is D
Solution and Explanation
Analysis of statements:
- (A) He₂: Correct (bond order = 0, unstable)
- (B) Li₂: Correct (σ1s²σ*1s²σ2s² configuration, diamagnetic)
- (C) O₂: Correct (π*2p¹π*2p¹ configuration, paramagnetic)
- (D) C₂: Wrong (σ1s²σ*1s²σ2s²π2p²π2p² configuration, diamagnetic)
- (E) H₂: Correct (σ1s², no unpaired electrons)
Thus, the correct option is (D): C₂ molecule is paramagnetic in vapour phase.
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