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The carbon-oxygen bond in phenol is slig...

The carbon-oxygen bond in phenol is slightly stronger than that in methanol. Why ?

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Positive resonance effect is observed in phenols. Due to this +R effect, lone pair of electrons of -OH group are in conjugation with `pi` electrons of the ring and the following resonance hybrid are obtained.

From the above resonating structure, it is very clear that C-O bond of phenol acquires some partial double bond character while the C-O bond of methanol is purely single bond. Therefore, the carbon-oxygen bond in phenol is slightly stronger than that in methanol.
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NCERT EXEMPLAR-ALCOHOLS, PHENOLS AND ETHERS-Alcohols, Phenols And Ethers
  1. Explain why p-nitrophenol is more acidic than phenol ?

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  2. Explain why alcohols and ethers of comparable molecular mass have diff...

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  3. The carbon-oxygen bond in phenol is slightly stronger than that in met...

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  4. Arrange water, ethanol and phenol in increasing order of acidity and g...

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  5. Match the structures of the compounds given in Column I with the name ...

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  6. Match the starting material given in Column I with the products formed...

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  7. Match the items of Column I with items of Column II.

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  8. Match the items of Column I with items of Column II.

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  9. Assertion (A) Addition reaction of water to but-1-ene in acidic medium...

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  10. Assertion (A) p-nitrophenol is more acidic than phenol. Reason (R) N...

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  11. Assertion (A) IUPAC name of the compound CH(3)-underset(CH(3))unders...

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  12. Assertion (A) Bond angle is ethers is slightly less than tetrahedral a...

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  13. Assertion (A) Boiling points of alcohols and ethers are high. Reason...

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  14. Assertion (A) Like bromination of benzene, bromination of phenol is al...

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  15. Assertion (A) o-nitrophenol is less soluble in water than the m and p-...

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  16. Assertion (A) Ethanol is a weaker acid than phenol. Reason (R) Sodiu...

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  17. Assertion (A) Phenol forms 2, 4, 6-tribromophenol o treatement with Br...

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  18. Assertion (A) Phenols give o-and p-nitrophenol on nitration with conc....

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  19. Write the mechanism of the reaction of HI with methoxybenzene.

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  20. (a) Name the starting material used in the industrial preparation of p...

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