Phenols
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The most acidic compound among the following is
1. phenol
2. Ethanol
3. 3,5-dinitrophenol
4. 4-methoxy phenol
The most acidic compound among the following is 3,5-dinitrophenol
The most acidic compound among the following is 3,5-dinitrophenol
See lessWhich one of the following compounds would undergo nitration with greatest ease?
1. Benzene
2. Phenol
3. Nitrobenzene
4. Benzoic acid
Phenol compounds would undergo nitration with greatest ease.
Phenol compounds would undergo nitration with greatest ease.
See lessPhenol on treating with concentrated H2SO4 at 100ºC mainly produces
(1) ortho – phenolsulphonic acid
(2) para – phenolsulphonic acid
(3) A 50% mixture of ortho – and para – phenolsulphonic acid
(4) Phenol – 2, 4, 6 – trisulphonci acid
Phenol on treating with concentrated H2SO4 at 100ºC mainly produces para – phenolsulphonic acid
Phenol on treating with concentrated H2SO4 at 100ºC mainly produces para – phenolsulphonic acid
See lessPhenol on treating with concentrated H2SO4 at 15–20ºC mainly produces
(1) Phenol -2 – sulphonic acid
(2) Phenol -4 – sulphonic acid
(3) A 50% mixture of ortho and para phenol sulphonic acid
(4) Phenol – 2, 46 – trisulphonic acid
Phenol on treating with concentrated H2SO4 at 15–20ºC mainly produces Phenol -4 – sulphonic acid
Phenol on treating with concentrated H2SO4 at 15–20ºC mainly produces Phenol -4 – sulphonic acid
See lessWhich does not have a carboxyl group ?
1. Picric acid
2. Ethanoic acid
3. Aspirin
4. Benzoic acid
Picric acid does not have a carboxyl group
Picric acid does not have a carboxyl group
See lessWhich of the following order is true regarding the acidic nature of phenol?
(1) Phenol > o – Cresol > o – Nitrophenol
(2) Phenol > o – Cresol < o – Nitrophenol
(3) Phenol < o – Cresol < o – Nitrophenol
4) Phenol < o – Cresol > o – Nitrophenol
Phenol > o – Cresol < o – Nitrophenol is true regarding the acidic nature of phenol
Phenol > o – Cresol < o – Nitrophenol is true regarding the acidic nature of phenol
See lessIn the following compounds
I. Phenol
II. 4-methyl phenol
III. 3-nitrophenol
IV. 4-nitrophenol
The order of acidity is
1. III > IV > I > II
2. I > IV > III > II
3. II > I > III > IV
4. IV > III > I > II
The order of acidity is IV > III > I > II
The order of acidity is IV > III > I > II
See lessIn the Libermann’s nitroso reaction, sequential changes in the colour of phenol occurs as
(1) Deep blue → red → deep blue
(2) Red → Deep Blue → Green
(3) Red → Green →White
(4) White →Red →Green
In the Libermann's nitroso reaction, sequential changes in the colour of phenol occurs as Deep blue → red → deep blue
In the Libermann’s nitroso reaction, sequential changes in the colour of phenol occurs as Deep blue → red → deep blue
See lessOn distilling 2 – hydroxy benzoic acid with Zn dust, it gives
(1) Phenol
(2) Benzoic acid
(3) Benzaldehyde
(4) A polymeric compound
On distilling 2 – hydroxy benzoic acid with Zn dust, it gives Benzoic acid
On distilling 2 – hydroxy benzoic acid with Zn dust, it gives Benzoic acid
See lessAssertion (A): Phenols are more acidic than aliphatic alcohols.
Reason (R): Phenoxides are stabilized by resonance.
(1) Both A & R are correct, R is the correct explanation of A.
(2) Both A & R are correct, R is not the correct explanation of A
(3) A is correct but R is incorrect
(4) A is incorrect but R is correct
(1) Both A & R are correct, R is the correct explanation of A.
(1) Both A & R are correct, R is the correct explanation of A.
See less