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Unlike most hydrocarbons, azulene (C(10)...

Unlike most hydrocarbons, azulene `(C_(10)H_(8))` is highly coloured (deep blue), although its is omer, nephthalene does not have significant zwitter-ionic character , azulene does.
(i) Draw a reasonance structure of azulene in which five-membered ring is anionic and
the seven-membered ring cationic.
(ii) Can azulene be considered aromatic ?

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The correct Answer is:
`(##ALN_CHM_C09(I)_E01_266_A01##)`
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ALLEN-ALKENE, ALKANE & ALKYNE -EXERCISE-4[B]
  1. Unlike most hydrocarbons, azulene (C(10)H(8)) is highly coloured (deep...

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  2. Explain, which of these compounds is a stronger acid:

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  3. Arrange A,B, C in increasing potential energy:

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  4. Give reasons in two or three sentences only for the following 'Phenyl...

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  5. What are the major products in the following reaction:

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  6. Arrange the following in incrasing order of electrophilic strength:

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  7. Which is more reactive towards S(E) and explain?

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  8. What are the major products when NO(2)^(+) (nitronium) reacts with

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  9. Which of the following compounds has the greater dipole moment?

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  10. Give one chemical test to distingusih between the compound of the foll...

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  11. A compound (A) reacts with thionylchloride to give a compound (B). (B)...

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  12. A compound [A] with molecular formula C(4)H(10)O reacts rapidly with m...

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  13. Give the product of the reaction of Ph(2)CHCH(2)OH with HBr and explai...

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  14. Hydration of 3-phenylbut-1-ene in dil H(2)So(4) will give mainly :

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  15. When A given bel,ow reacts with HI products is B and not C. Explain

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  16. Isotopic carbon-14 in (A) appears at new position (As in B) (A) reacts...

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  17. Complete the following reaction

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  18. Complete the following reactions CH(3)CH=CH(2)overset(mCPBA)rarr A ...

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  19. In the following dehydration of diol with H(3)PO(4) following product ...

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  20. In the following S(N)1 reaction: underset(S(N)1)overset(OH^(o+))rar...

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