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The barrier for rotation about indicated...

The barrier for rotation about indicated bonds will be maximum in which of these compounds?

A

X

B

Y

C

Z

D

Same in all

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The correct Answer is:
B
one ring becoms antiaromatic.
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HIMANSHU PANDEY-GENERAL ORGANIC CHEMISTRY-Level 2 (Q.151 To Q.175)
  1. Which one of the following compounds is not aromatic?

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  2. Which one of the following compounds is the strongest acid?

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  3. Which of following pairs are tautomers?

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  4. The keto isomer of the following compound is :

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  5. Which of the following compounds will exhibit tautomerism?

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  6. Arrange the following compounds in increasing order of their heat of c...

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  7. Arrange the following in increasing order of their heat of hydrogenati...

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  8. Arrange the following in increasing order of their heat of combustion ...

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  9. Arrange the following in increasing order of heat of hydrogenation :

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  10. Arrange the following in decreasing order of heat of hydrogenation :

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  11. The correct acidic strength order of acidic hydrogen P,Q and R is resp...

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  12. The correct basicity order of atoms X,Y and Z is :

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  13. Which of the following compounds do not have all C-C bond of same leng...

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  14. Find out correct order of energy required for heterolytic cleavage of...

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  15. Find out correct order for the energy requried for heterolytic cleavag...

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  16. Find out correct representation of singlet carbene :

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  17. Find out correct representation of triplet carbene :

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  18. Which of the following orders is correct order of these anions?

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  19. The barrier for rotation about indicated bonds will be maximum in whic...

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  20. The most stable canonical structure of this molecule is :

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