Q 11 :

Total number of aromatic compounds among the following compounds is _____.               [2024]



(1)

 



Q 12 :

[IMAGE 127]                                      [2023]

  • [IMAGE 128] 

     

  • [IMAGE 129] 

     

  • [IMAGE 130] 

     

  • [IMAGE 131] 

     

(1)

[IMAGE 132] 



Q 13 :

Given below are two statements, one is labelled as Assertion A and the other is labelled as Reason R.

Assertion A: Benzene is more stable than hypothetical cyclohexatriene.

Reason R: The delocalized π electron cloud is attracted more strongly by nuclei of carbon atoms.

In the light of the above statements, choose the correct answer from the options given below:                 [2023]

  • A is false but R is true

     

  • Both A and R are correct but R is NOT the correct explanation of A

     

  • A is true but R is false

     

  • Both A and R are correct and R is the correct explanation of A

     

(4)

Benzene has resonance energy 36 Kcal per mole.



Q 14 :

Among the following compounds, the one which shows highest dipole moment is               [2023]

  • [IMAGE 133]

     

  • [IMAGE 134]

     

  • [IMAGE 135]

     

  • [IMAGE 136]

     

(1)

[IMAGE 137]

The given compound has the highest dipole moment because both rings become aromatic, that is why most polar compound.

 



Q 15 :

Given below are two statements:

Statement I: Tropolone is an aromatic compound and has 8 π electrons.

Statement II: π electrons of >C=O group in tropolone is involved in aromaticity.

In the light of the above statements, choose the correct answer from the options given below:         [2023]

  • Statement I is true but Statement II is false

     

  • Both Statement I and Statement II are false

     

  • Statement I is false but Statement II is true

     

  • Both Statement I and Statement II are true

     

(1)

[IMAGE 138]