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9. Hydricarbon — Chemistry STD 11 Science — Question

Rajasthan BoardEnglish MediumSTD 11 ScienceChemistry9. Hydricarbon1 Mark
MCQ
Given below are two statements:

Statement $I$: Tropolone is an aromatic compound and has $8 \pi$ electrons.

Statement $II$: $\pi$ 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:

  • A
    Both Statement $I$ and Statement $II$ are true
  • ✓
    Statement $I$ is true but Statement $II$ is false
  • C
    Statement $I$ is false but Statement $II$ is true
  • D
    Both Statement $I$ and Statement $II$ are false
✓

Answer

Correct option: B.
Statement $I$ is true but Statement $II$ is false
b
Tropolone is an aromatic compound and has $8 \pi$ electrons $\left(6 \pi e ^{-}\right.$are endocyclic and $2 \pi e^{-}$ are exocyclic) and $\pi$ electrons of $ > C = O$ group in tropolone is not involved in aromaticity.

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