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Arrange the following resonating structu...

Arrange the following resonating structures in order of increasing stability
`underset((I))(CH_(2)=overset(+)(N)=overset(-)(N))" "underset((II))(H_(2)overset(+)(C)=N=overset(-)(N))" "underset((III))(H_(2)overset(-)(C)-overset(+)(N) equiv N)" "underset((IV))(H_(2) overset(-)(C)-N=overset(+)(N))`

A

`(IV)gt(I)gt(III)gt(II)`

B

`(II)gt(IV)gt(I)gt(III)`

C

`(III)gt(II)gt(IV)gt(I)`

D

`(I)gt(IV)gt(III)gt(II)`

Text Solution

Verified by Experts

The correct Answer is:
D
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RESONANCE ENGLISH-GENERAL ORGANIC CHEMISTRY-I-EXERCISE-1 PART-II
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  2. HNCO (isocyanic acid) has following resonating structures : underset...

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

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  4. The most stable resonating structure is

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

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

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

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

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

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  10. +I effect is shown by

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  11. Weakest acid is:

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

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

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  14. Which of the following cannot exhibit hypercojugation -

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

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

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

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  18. Which of the following is aromatic hydrocarbon ?

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  19. Identify the aromatic amino acid from the given option.

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  20. Alkanes burn with a smoky flame.

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