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Which of the following statement is inco...

Which of the following statement is incorrect?

A

Acid catalysed enolisation involve the intermediate carbanion

B

Racemisation occurs on keeping aqueous solution of carbonyl compounds in which a-carbon is asym metric containing one enolisable proton

C

Enol form is less stable than keto form in cyclopent-1,2-dione

D

Keto form is more stable than enol in butan-1,2-dione

Text Solution

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The correct Answer is:
C
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AAKASH SERIES-ISOMERISM -PRACTICE SHEET EXERCISE-I (Structural Isomerism) LEVEL-II (ADVANCED) Straight Objective Type Questions
  1. Given compound shows which type of isomerism

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  2. Ortho, meta and para dichlorobenzenes are

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  3. Number of isomers for the compound dihydroxy benzene

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  4. An organic compound of structure CH(3)-CH(2)-CH(2)-CO-CH(3) shows func...

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  5. The number of benzene isomers for C(8)H(10) ?

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  6. Compounds with C(4)H(11)N as molecular formula can exhibit

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  7. The no. of amides having formula C4H9NO are :

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  8. Which of the following statements is right

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  9. Tautomer in following is Diad system :

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  10. What statement is correct for Keto-enol tautomerism ?

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  11. Tautomer of following compound is :

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  12. Maximum enolisation takes place in :

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  13. Tautomerism exhibited by

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  14. Tautomers possess

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  15. Which of the following statement is incorrect?

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  16. Which of the fillowing pairs cannot exist in between two structural is...

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  17. Choose the correct enol content order of the following compounds in th...

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  18. Write the IUPAC name of the CH(3)-underset(CH(3))underset(|)CH-underse...

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  19. Which of the following can be used for nitration of aromatic compound ...

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  20. Decreasing order of enol content of the following compound in liquid p...

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