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Para nitrophenol is having lower pKa value than phenol becauseA) phenol is more acidic than p-nitro phenolB) anion of p-nitrophenol is more stabilised by resonance than that of phenolC) degree of ionisation of p-nitro phenol is less than that of phenolD) anion of p-nitrophenol is less stable than that of phenol

Para nitrophenol is having lower pKa value than phenol becauseA) phenol is more acidic than p-nitro phenolB) anion of p-nitrophenol is more stabilised by resonance than that of phenolC) degree of ionisation of p-nitro phenol is less than that of phenolD) anion of p-nitrophenol is less stable than that of phenol

Grade:12

1 Answers

Vikas TU
14149 Points
7 years ago
Because, Anion of p-nitrophenol is more stabilised by resonance than that of phenol.Due to NO2 group attached to the para position it shows -M effect badly which is not in the case for simple Phenol.

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