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Which of the following compounds is not ...

Which of the following compounds is not aromatic ?

A

B

C

D

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The correct Answer is:
C
(a) has a cyclic cloud of `2 pi`-electrons and hence is aromatic. (b) and (d) have a cyclic cloud of six `pi`-electrons and hence are aromatic while (c ) has 4 `pi`-electrons and hence is antiaromatic.
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PRADEEP-HYDROCARBONS-Competition Focus (JEE(main and advanced)/Medical Entrance) I. MULTIPLE CHOICE QUESTIONS
  1. The correct statement is :

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  2. Which one of the following is an aromatic compound ?

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  3. Which of the following compounds is not aromatic ?

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  4. From the following compounds choose the one which is not aromatic ?

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  5. The chemical system that is non- aromatic is

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  6. Among the following the aromatic compound is

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  7. Which of the following compounds are aromatic ?

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  8. Which is a non-aromatic compound

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  9. The non aromatic compound among the following is -

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  10. The radical is aromatic because it has

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  11. Which of the following is not aromatic

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  12. Cycloheptatrienyl cation is :

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  13. The most likely protonation site in the following molecule is

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  14. Which one of the following is an aromatic compound ?

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  15. The total number of aromatic species genetic the following reactions i...

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  16. Given : The enthalpy of hydrogenation of these compounds will be...

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  17. In reaction C6H5CH3overset"oxidation"to A overset"NaOH"to B overset"...

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  18. What is the electrophile when RCl + AlCl3 are used in Friedel-Crafts r...

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  19. In the given reaction, the product P is

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  20. The treatment of benzene with isobutene in the presence of sulphuric a...

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