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प्रश्न
Explain why p-nitrophenol is more acidic than phenol.
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उत्तर
The electron-withdrawing group (−NO2), withdraws electrons and disperses the negative charge. Therefore, the −NO2 group stabilizes the phenoxide ion. Hence p-nitrophenol is more acidic than phenol.
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संबंधित प्रश्न
Write IUPAC name of the following compound:
Write structures of the compounds whose IUPAC names are as follows:
3-Chloromethylpentan-1-ol.
Give the IUPAC name of the following ether:
CH3OCH2CH2Cl
Write the structure and IUPAC name of 'methyl-n-propyl ether'.
How is phenol converted into the following?
Benzene
How do you convert the Ethanal to Propanone
In the dehydration of alcohols to alkenes by heating with concentrated sulphuric acid, the initiation step is:
(1) formation of carbonation
(2) formation of an ester
(3) protonation of the alcohol molecule
(4) elimination of water
Write structural formulae for Cyclohex-2-en-1-ol.
One of the following is not a dihydroxy derivative of benzene.
1-Propanol and 2-propanol can be best distinguished by:
\[\ce{HC ≡ CH ->[HgSO4][H2SO4] ->[CH3MgBr][H2O] ->[PBr3]}\]
The heating of phenyl methyl ether with HI produces:
Which of the following reagents can be used to oxidise primary alcohols to aldehydes?
(i) \[\ce{CrO3}\] in anhydrous medium.
(ii) \[\ce{KMnO4}\] in acidic medium.
(iii) Pyridinium chlorochromate.
(iv) Heat in the presence of Cu at 573 K.
Arrange the following compounds in decreasing order of acidity.
\[\ce{H2O, ROH, HC ≡ CH}\]
Match the structures of the compounds given in Column I with the name of the compounds given in Column II.
| Column I | Column II | |
| (i) |  |
(a) Hydroquinone |
| (ii) |  |
(b) Phenetole |
| (iii) |  |
(c) Catechol |
| (iv) |  |
(d) o-Cresol |
| (v) |  |
(e) guinone |
| (vi) |  |
(f) Resorcinol |
| (g) Anisole |
Assertion: Phenols give o- and p-nitrophenol on nitration with conc. \[\ce{HNO3}\] and \[\ce{H2SO4}\] mixture.
Reason: –OH group in phenol is o–, p– directing.
Write complete reaction for the bromination of phenol in aqueous and non-aqueous medium.
Write the IUPAC name of the following compound.
How are the following conversions carried out?
Methyl magnesium bromide→2-Methylpropan-2-ol.
The IUPAC name of 
is ______.
