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Mesomeric effect invloves the :...

Mesomeric effect invloves the :

A

partical displacement of electrons

B

delocalization of sigma electrons

C

delocalization of pi electrons

D

delocalization of pi and sigma electrons

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The correct Answer is:
C
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OP TANDON-BASIC PRINCIPLES OF ORGANIC COMPOUNDS (MECHANISM OF ORGANIC REACTIONS)-OBJECTIVE QUESTIONS (Level-A)
  1. Which of the following is the most stable compound?

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  2. Hyperconjugation involves overlap of which of the following orbitals?

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  3. Mesomeric effect invloves the :

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  4. Which one of the following is most reactive towards electrophilic atta...

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  5. Which among the following statements are true with respect to electron...

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  6. The hydrolysis of 2-bromo-3-methylbutane by S(N^(1)) mechanism gives m...

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  7. The electrophile, E^((o+)) attacks the benzene ring to generate the in...

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  8. Which one of the following carbanions is the least stable?

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  9. CH(3)CH(2)Cl undergoes homolytic fission produces:

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  10. Tertiary butyl chloride preferably undergo hydrolysis by:

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  11. In a S(N^(2)) substitution reaction of the type R-Br+Cl^(-)overset("...

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  12. The correct stability order for the following speceis is :

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  13. Arrange the carbanions, (CH(3))(3)bar(C),bar(C)Cl(3),(CH(3))(2)bar(C)H...

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  14. Which of the following carbocations will be more stable?

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  15. Arrange the following free radicals in order of decreasing stability: ...

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  16. The most easily hydrolysed molecule under S(N^(1)) condition is:

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  17. Least active electrophile is :

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  18. In the following carbocation, H//CH(3) that is most likely to migrate ...

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  19. Arrange the following resonating structures in order of increasing sta...

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  20. Identify a species which is not a Bronsted acid but a Lewis acid:

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