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प्रश्न
Arrange the following compounds in increasing order of acidity and give a suitable explanation.
Phenol, o-nitrophenol, o-cresol
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उत्तर
Increasing order of acidity.
o-cresol < Phenol < o-nitrophenol
In cresol, 
, the electron-donating group \[\ce{(-CH3)}\] gives electrons and intensify the charge on phenoxide ion and therefore makes it unstable. Therefore, o-cresol is less acidic than phenol. In o-nitrophenol, the electron-withdrawing \[\ce{(-NO2)}\] group withdraws electrons and disperses the - ve charge and stabilizes the phenoxide ion. Therefore, o-nitrophenol is more acidic than phenol.
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संबंधित प्रश्न
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| Column I | Column II | |
| (i) | Antifreeze used in car engine | (a) Neutral ferric chloride |
| (ii) | Solvent used in perfumes | (b) Glycerol |
| (iii) | Starting material for picric acid | (c) Methanol |
| (iv) | Wood spirit | (d) Phenol |
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| (vi) | By product of soap industry used in cosmetics | (f) Ethanol |
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| Column I | Column II | |
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| (ii) | Kolbe’s reaction | (b) Ethyl alcohol |
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| (iv) | Conversion of 2° alcohol to ketone | (d) Wood spirit |
| (v) | Reimer-Tiemann reaction | (e) Heated copper at 573 K |
| (vi) | Fermentation | (f) Reaction of alkyl halide with sodium alkoxide |
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