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The resonance energy of benzene is...

The resonance energy of benzene is

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Thre resonance energy of benzene is approximately

Heat of hydrogenation of ethene is x_(1) and that of benzene is x_(2) . Hence resonance energy of benezene is

Compounds having heat of hydrogenation lesser than that of cyclohexa-1, 4-diene i.e. [Hint resonance energy of benzene is 36 Kcal]

The enthalpy of hydrogenation of cyclohexene is -119.5KJ . If resonance energy of benzene is -150.4KJMol^(-1) , its enthalpy of hydrogenation would be

PRADEEP-HYDROCARBONS-ADDITIONAL QUESTIONS (SHORT ANSWER QUESTIONS)
  1. Why do alkynes undergo addition reactions while simple alkenes do not?

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  2. Discuss the stereochemistry of the reduction products obtained when bu...

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  3. Sketch the mechanism of addition of water to alkynes.

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  4. Reactions of Alkynes

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  5. isomerism of alkenes

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  6. discuss the orbital structure of ethene

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  7. Benzene contains three double bonds yet it behaves like a saturated co...

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  8. Why is that the carbon-carbon bond distance in benzene is intermediate...

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  9. Define substitution reactions. Why do arenes undergo substitution reac...

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  10. What is meant by (i) delocalization (ii) resonance energy ?

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  11. The resonance energy of benzene is

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  12. Explain the term aromaticity ? How can Huckel rule be used to determin...

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  13. What are the necessary conditions for any system to be aromatic?

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  14. Benzene is treated with methyl chloride in presence of anhydrous AlCl3...

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  15. Which of the following undergoes electrophilic substitution reactions ...

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  16. Write down the products and give the mechanism of the following reacti...

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  17. Explain the directive influence of substituents on benzene and their e...

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  18. Which of the following group (s) is/are o- and p-directing ?

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  19. Predict the products of the following reactions : (i)Toluene overset...

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  20. Comment upon the toxicity of polynuclear hydrocarbons

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