MCQ
The strongest acid in the following compounds is:
- Aphenol
- Bp-cresol
- Cm-nitrophenol
- Dp-nitrophenol
✓
Answer
- p-nitrophenol
Explanation:
o-nitro phenol participates in intra-molecular H−bonding, which makes it less acidic than p-nitro phenol. Since acidic strength depends on the stability of negative ion after removal of acidic H, −NO2 group in o and p position provides −M effect as the negative charge delocalizes.
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