Home
Class 12
CHEMISTRY
Phenol is less acidic than...

Phenol is less acidic than

A

ethanol

B

o-nitrophenol

C

o-methylphenol

D

o-methoxyphenol

Text Solution

AI Generated Solution

The correct Answer is:
To determine which compound phenol is less acidic than, we need to analyze the acidity of phenol in comparison to the given compounds: ethanol, ortho-nitrophenol, ortho-methyl phenol, and ortho-methoxy phenol. ### Step-by-Step Solution: 1. **Understanding Phenol's Acidity**: - Phenol (C6H5OH) has a hydroxyl (-OH) group attached to a benzene ring. The acidity of phenol is due to the ability of the -OH group to donate a proton (H+), forming a phenoxide ion (C6H5O-). 2. **Comparing with Ethanol**: - Ethanol (C2H5OH) has a similar -OH group but is less acidic than phenol. This is because the ethyl group (C2H5) is an electron-donating group (due to the +I effect), which increases the electron density on the oxygen atom, making it less likely to lose a proton compared to phenol. - **Conclusion**: Phenol is more acidic than ethanol. 3. **Comparing with Ortho-Nitrophenol**: - Ortho-nitrophenol has a nitro group (-NO2) at the ortho position. The nitro group is a strong electron-withdrawing group (due to -I and -R effects), which stabilizes the negative charge on the phenoxide ion formed after deprotonation. - **Conclusion**: Ortho-nitrophenol is more acidic than phenol. 4. **Comparing with Ortho-Methyl Phenol**: - Ortho-methyl phenol has a methyl group (-CH3) at the ortho position. The methyl group is an electron-donating group (due to +I effect), which increases the electron density on the oxygen atom, making it less acidic than phenol. - **Conclusion**: Ortho-methyl phenol is less acidic than phenol. 5. **Comparing with Ortho-Methoxy Phenol**: - Ortho-methoxy phenol has a methoxy group (-OCH3) at the ortho position. The methoxy group is also an electron-donating group (due to +I effect), which increases the electron density on the oxygen atom, making it less acidic than phenol. - **Conclusion**: Ortho-methoxy phenol is less acidic than phenol. ### Final Answer: Phenol is less acidic than **ortho-nitrophenol**.
To determine which compound phenol is less acidic than, we need to analyze the acidity of phenol in comparison to the given compounds: ethanol, ortho-nitrophenol, ortho-methyl phenol, and ortho-methoxy phenol. ### Step-by-Step Solution: 1. **Understanding Phenol's Acidity**: - Phenol (C6H5OH) has a hydroxyl (-OH) group attached to a benzene ring. The acidity of phenol is due to the ability of the -OH group to donate a proton (H+), forming a phenoxide ion (C6H5O-). 2. **Comparing with Ethanol**: ...
Doubtnut Promotions Banner Mobile Dark
|

Topper's Solved these Questions

  • ALDEHYDE, KETONES AND CARBOXYLIC ACIDS

    NCERT EXEMPLAR ENGLISH|Exercise Long Answer Type Questions|4 Videos

Similar Questions

Explore conceptually related problems

Phenol is more acidic than :

Statement -1 : Phenol is more acidic than ethyl alcohol Statement -2 : Phenol is a weaker acid than benzoic acid Statement -3 : Phenol is a good substrate to prepare o- salicylic acid

Phenol is more acidic than alcohol because :

Explain the following observations: Phenol is more acidic than ethanol.

Assertion : Phenol is more acidic than ethanol. Reason : Phenoxide ion is resonance stabilized.

Statement-1- 1 Phenol is more acidic than water Statement-2 Phenoxide ion is resonance stabilized.

Statement-1: Phenol is more acidic than benzoic acid Statement-2: Fluorbenzene is les reactive than chlorobenzene towards electrophilic substitiution Statement-3: Friedel Craft alkylation is not possible in tertiary butyl benzene

Assertion : Ortho nitro phenol is more acidic than meta nitro phenol Reason : Ortho nitro phenol has more –I effect than meta nitro phenol

Explain why p-nitrophenol is more acidic than phenol ?

Statement-1: Ortho nitro phenol is more acidic than orthomethoxy Phenol Statement-2: NO_(2) is a deactivating group while OCH_(3) is activating group .

Home
Profile