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The least and most stable resonating str...

The least and most stable resonating structures respectively are:

A

2,1

B

2,3

C

3,1

D

1,2

Text Solution

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The correct Answer is:
C
`(3)` is least stable since octet of a heteroatom (oxygen) is left incomplete.
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A2Z-SOME BASIC PRINCIPALS OF ORGANIC CHEMISTRY-Section D - Chapter End Test
  1. The least and most stable resonating structures respectively are:

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  2. Arrange the following comounds in increasing order of length of their ...

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  3. The order of heat of hydrogenation in following compounds is:

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  4. S(N)1 reaction is faster in

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  5. Which compound would be least soluble in water?

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  6. Among the following compound which can be dehydrated very easily is :

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  7. Which of the follwing is not the characteristic of the mechanism of fr...

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  8. Find the strongest acid among the following compound

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  9. Among the following the dissociation constant is highest

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  10. Which one of the following compounds is most acidic

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  11. The optically active tartaric acid is named as D-(+)- tartaric acid be...

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  12. Among the following compounds (I-II) the correct order of reaction wit...

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  13. The following reaction is described as

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  14. Which of the following is the most stable cation?

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  15. The observed dipole moment of nitromethane is highly than the dipole m...

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  16. Dehydrohalogenation in presence of OH^(-) is correct represented by

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  17. Among the following the aromatic compound is

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  18. Which of the following compounds are not arranged in order of decreasi...

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  19. Most stable carbonium ion is :

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  20. Which one of the following species is most stable

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  21. Which of the following gives most stable carbocation by dehydration

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