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Among the following, the least stable re...

Among the following, the least stable resonance structure is :

A

B

C

D

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The correct Answer is:
A
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OP TANDON-BASIC PRINCIPLES OF ORGANIC COMPOUNDS (MECHANISM OF ORGANIC REACTIONS)-OBJECTIVE QUESTIONS (Level-A)
  1. The strongest base in aqueous solution among the following amines is :

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  2. As S(N^(2)) reaction at an asymmetric carbon of a compound always give...

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  3. Among the following, the least stable resonance structure is :

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  4. Which the following compound undergoes nucleophilic substitution react...

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  5. The corret order of increasing basicity of the given conjugated bases ...

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  6. Which of the following is correct for stability of phenoxide ion?

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  7. In the anion HCOO^(-), the two carbon-oxygen bonds are found to be equ...

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  8. Which of the following is a free radical substitution reaction?

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  9. Among the following compounds, the decreasing order of reactivity towa...

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  10. Arrange the following nucleophiles in the order of their nucleophilic ...

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  11. Identify the correct order of reactivity in electrophilic substitution...

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  12. Which one of the following is not true regarding electromeric effect?

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  13. Which of the following acids has the smallest dissociation constant?

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  14. H(3)C-underset(D)underset(|)CH-underset(CH(3))underset(|)(C)H(3)+Br^(*...

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  15. Among the following carbocations : (I) Ph(2)overset(+)"C"CH(2)Me (II...

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  16. Which one of the following characteristics belongs to an electrophile?

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  17. Carbocation as an intermediate is likely to be formed in the reaction ...

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  18. Which of the following pK(a) values, represents the strongest acid?

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  19. Which of the following orders regarding relative stability of free rad...

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  20. Which of the following is the strongest base?

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