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When does mesomeric effect come into exi...

When does mesomeric effect come into existence ? Illustrate with examples.

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ICSE-ORGANIC CHEMISTRY : SOME BASIC PRINCIPLES AND TECHNIQUES -SHORT ANSWER TYPE QUESTIONS
  1. What type of effects are involved in the following reactions ?

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  2. What are the main points of difference between inductive and electrome...

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  3. When does mesomeric effect come into existence ? Illustrate with examp...

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  4. Define mesomeric effect and differentiate + M-effect from - M-effect.

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  5. Compare inductive effect with mesomeric effect.

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  6. What do you understand by hyperconjugation effect ? Illustrate with an...

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  7. Explain the Hyperconjugation effect is also termed as 'no bond reso...

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  8. Why is the hyperconjugation effect exerted by a methyl group greater t...

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  9. Define heterolytic fission of a covalent bond.

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  10. Why is a 3^@ radical more stable as compared to 1^@ and 2^@ free r...

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  11. What are carbocations ? Give two examples.

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  12. Discuss the orbital structure of a carbocation.

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  13. What is relative order of reactivity of various types of carbocations ...

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  14. Define carbanion and discuss its orbital structure.

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  15. Why is 1^@ carbanion more stable than a 2 carbanion ?

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  16. What are carbenes ?

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  17. What are electrophilic reagents ? Give at least three examples.

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  18. Why do free radicals and carbenes act as electrophiles ?

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  19. What do you understand by nucleophilic reagents and what type of speci...

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  20. Why does ether act as a nucleophile ?

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