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Which of the following resonating struct...

Which of the following resonating structure is the least contributing structure ?`

A

B

C

D

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The correct Answer is:
B
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RESONANCE ENGLISH-GENERAL ORGANIC CHEMISTRY-I-EXERCISE-1 PART-II
  1. Resonance is not possible in

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  2. Which of the following is least stable ?

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  3. Which of the following resonating structure is the least contributing ...

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  4. HNCO (isocyanic acid) has following resonating structures : underset...

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

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  6. The most stable resonating structure is

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  7. Which of the following groups exerts +m effect when attached with benz...

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  8. Which of the following groups exerts +m effect when attached with benz...

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  9. Which of the following group show +M and -l effect?

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  10. Which of the following group shown +mgt - I effect?

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  11. Which of the following group show -m and -I effect?

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  12. +I effect is shown by

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  13. Weakest acid is:

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  14. Maximum extent of steric inhibition of resonance can be expected in

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

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  16. Which of the following cannot exhibit hypercojugation -

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  17. Which of the following will give maximum number of isomers?

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  18. Which one of the following has inductive, mesomeric and hyperconjugati...

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  19. Which of the following group has the maximum hyperconjugation effect ?

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  20. Which of the following is aromatic hydrocarbon ?

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