Advertisements
Advertisements
प्रश्न
Arrange the following compounds in increasing order of acidity and give a suitable explanation.
Phenol, o-nitrophenol, o-cresol
Advertisements
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.
APPEARS IN
संबंधित प्रश्न
How do you convert the following:
Ethanol to Propan-2-ol
Give simple chemical test to distinguish between Ethanol and Phenol.
Among the following the one which reacts most readily with ethanol is:
Which of the following is correct?
Wood spirit is known as acetone:
Phenol is less acidic than ______.
Phenol can be distinguished from ethanol by the reactions with:
(i) \[\ce{Br2/water}\]
(ii) \[\ce{Na}\]
(iii) Neutral \[\ce{FeCl3}\]
(iv) All the above
Out of 2-chloroethanol and ethanol which is more acidic and why?
Suggest a reagent for conversion of ethanol to ethanal.
Name the enzymes and write the reactions involved in the preparation of ethanol from sucrose by fermentation.
The carbon-oxygen bond in phenol is slightly stronger than that in methanol. Why?
Match the items of column I with items of column II.
| 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 |
| (v) | Reagent used for detection of phenolic group | (e) Ethleneglycol |
| (vi) | By product of soap industry used in cosmetics | (f) Ethanol |
Match the items of column I with items of column II.
| Column I | Column II | |
| (i) | Methanol | (a) Conversion of phenol to o-hydroxysalicylic acid |
| (ii) | Kolbe’s reaction | (b) Ethyl alcohol |
| (iii) | Williamson’s synthesis | (c) Conversion of phenol to salicylaldehyde |
| (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 |
Liquor poisoning is due to
Write chemical reactions of following reagents on methoxyethane:
dilute H2SO4
Convert the following Ethanal to ethanol.
Give IUPAC names of the following compounds:
\[\begin{array}{cc}
\ce{CH3 - CH - CH - CH - CH2-OH }\\
|\phantom{......}|\phantom{......}|\phantom{.......}\\
\ce{Cl}\phantom{....}\ce{CH3}\phantom{...}\ce{CH3}\phantom{.....}
\end{array}\]
