Number of unpaired electrons in O2 molecule is : from Chemi

Previous Year Papers

Download Solved Question Papers Free for Offline Practice and view Solutions Online.

Test Series

Take Zigya Full and Sectional Test Series. Time it out for real assessment and get your results instantly.

Test Yourself

Practice and master your preparation for a specific topic or chapter. Check you scores at the end of the test.
Advertisement

 Multiple Choice QuestionsMultiple Choice Questions

561.

Which of the following is paramagnetic ?

  • N2

  • C2

  • N2+

  • O22-


562.

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.


563.

Intermolecular hydrogen bonding is strongest in :

  • C2H5OH

  • HF

  • H2O

  • CH3COCH3


564.

Hybridization present in ClF3 is :

  • sp2

  • sp3

  • dsp2

  • sp3d


Advertisement
565.

Number of electrons surrounding Kr in KrF2 is :

  • 10

  • 6

  • 4

  • 8


566.

H - I - O bond angle in H2O2 :

  • 90o

  • 180o

  • 109.5o

  • 94.8o


567.

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.


568.

Electron deficient molecule is :

  • CCl4

  • PCl5

  • BF3

  • SF6


Advertisement
Advertisement

569.

Number of unpaired electrons in O2 molecule is :

  • zero

  • one

  • two

  • four


C.

two

The molecular orbital elctronic configuration of O2 is -

O2 (16e-) = σ1s2 , σ1s2 , σ2s2 , σ2s2 , σ2px2 , π2py2 , π2pz2 , π2py1 , π2pz1 

Hence , it has two unpaired lectrons and is paramagnetic .


Advertisement
570.

Bond order in benzene is :

  • 1

  • 2

  • 1.5

  • none of these


Advertisement