323252
When benzene sulphonic acid and p-nitrophenol are treated with \(\mathrm{NaHCO}_{3}\), the gases released respectively are
1 \(\mathrm{SO}_{2}, \mathrm{NO}_{2}\)
2 \(\mathrm{SO}_{2}, \mathrm{NO}\)
3 \(\mathrm{SO}_{2}, \mathrm{CO}_{2}\)
4 \(\mathrm{CO}_{2}, \mathrm{CO}_{2}\)
Explanation:
\(\mathrm{CO}_{2}, \mathrm{CO}_{2}\). In both the cases, \(\mathrm{CO}_{2}\) gas is released from \(\mathrm{NaHCO}_{3}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323253
Order of acidic nature
1 A \(>\) C \(>\) D \(>\) B
2 A \(>\) B \(>\) D \(>\) C
3 A \(>\) B \(>\) C \(>\) D
4 D \(>\) C \(>\) B \(>\) A
Explanation:
Presence of electron withdrawing group (i.e. \(-\mathrm{NO}_{2}\) ) increases the acidic nature in phenols. \(-\mathrm{NO}_{2}\) at ortho - position [i.e. structure (B)] forms hydrogen bond with \(-\mathrm{OH}\) group. Thus, structure (B) is less acidic than structure (A). On the other hand, electron releasing group bonded with the ring (i.e. \(-\mathrm{CH}_{3}\) ) decreases the acidic nature, thus structure (C) is less acidic than phenol. Hence, correct order of acidic nature is and option (2) is the correct
AIIMS - 2019
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323254
Given below are two statements : Statement (A) : p-nitrophenol is more acidic than m-nitrophenol and o-nitrophenol. Statement (B) : Ethanol will give immediate turbidity with Lucas reagent.
1 Statement A is correct but statement B is incorrect.
2 Statement A is incorrect but statement \(\mathrm{B}\) is correct.
3 Both Statements A and B are correct.
4 Both Statements A and B are incorrect.
Explanation:
\(\mathrm{NO}_{2}\) is an EWG and increases acidic strength of phenols. This effect is pronounced at para and ortho positions than at meta position. Thus, statement A is correct. Ethanol is a primary alcohol and gives turbidity after heating.
JEE - 2024
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323255
Which of the following is strongly acidic?
1 Phenol
2 o-Cresol
3 p-Nitrophenol
4 p-Cresol
Explanation:
In p-nitrophenol, \(-\mathrm{NO}_{2}\) group is an electron withdrawing which increases the acidic strength of phenols group.
323252
When benzene sulphonic acid and p-nitrophenol are treated with \(\mathrm{NaHCO}_{3}\), the gases released respectively are
1 \(\mathrm{SO}_{2}, \mathrm{NO}_{2}\)
2 \(\mathrm{SO}_{2}, \mathrm{NO}\)
3 \(\mathrm{SO}_{2}, \mathrm{CO}_{2}\)
4 \(\mathrm{CO}_{2}, \mathrm{CO}_{2}\)
Explanation:
\(\mathrm{CO}_{2}, \mathrm{CO}_{2}\). In both the cases, \(\mathrm{CO}_{2}\) gas is released from \(\mathrm{NaHCO}_{3}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323253
Order of acidic nature
1 A \(>\) C \(>\) D \(>\) B
2 A \(>\) B \(>\) D \(>\) C
3 A \(>\) B \(>\) C \(>\) D
4 D \(>\) C \(>\) B \(>\) A
Explanation:
Presence of electron withdrawing group (i.e. \(-\mathrm{NO}_{2}\) ) increases the acidic nature in phenols. \(-\mathrm{NO}_{2}\) at ortho - position [i.e. structure (B)] forms hydrogen bond with \(-\mathrm{OH}\) group. Thus, structure (B) is less acidic than structure (A). On the other hand, electron releasing group bonded with the ring (i.e. \(-\mathrm{CH}_{3}\) ) decreases the acidic nature, thus structure (C) is less acidic than phenol. Hence, correct order of acidic nature is and option (2) is the correct
AIIMS - 2019
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323254
Given below are two statements : Statement (A) : p-nitrophenol is more acidic than m-nitrophenol and o-nitrophenol. Statement (B) : Ethanol will give immediate turbidity with Lucas reagent.
1 Statement A is correct but statement B is incorrect.
2 Statement A is incorrect but statement \(\mathrm{B}\) is correct.
3 Both Statements A and B are correct.
4 Both Statements A and B are incorrect.
Explanation:
\(\mathrm{NO}_{2}\) is an EWG and increases acidic strength of phenols. This effect is pronounced at para and ortho positions than at meta position. Thus, statement A is correct. Ethanol is a primary alcohol and gives turbidity after heating.
JEE - 2024
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323255
Which of the following is strongly acidic?
1 Phenol
2 o-Cresol
3 p-Nitrophenol
4 p-Cresol
Explanation:
In p-nitrophenol, \(-\mathrm{NO}_{2}\) group is an electron withdrawing which increases the acidic strength of phenols group.
323252
When benzene sulphonic acid and p-nitrophenol are treated with \(\mathrm{NaHCO}_{3}\), the gases released respectively are
1 \(\mathrm{SO}_{2}, \mathrm{NO}_{2}\)
2 \(\mathrm{SO}_{2}, \mathrm{NO}\)
3 \(\mathrm{SO}_{2}, \mathrm{CO}_{2}\)
4 \(\mathrm{CO}_{2}, \mathrm{CO}_{2}\)
Explanation:
\(\mathrm{CO}_{2}, \mathrm{CO}_{2}\). In both the cases, \(\mathrm{CO}_{2}\) gas is released from \(\mathrm{NaHCO}_{3}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323253
Order of acidic nature
1 A \(>\) C \(>\) D \(>\) B
2 A \(>\) B \(>\) D \(>\) C
3 A \(>\) B \(>\) C \(>\) D
4 D \(>\) C \(>\) B \(>\) A
Explanation:
Presence of electron withdrawing group (i.e. \(-\mathrm{NO}_{2}\) ) increases the acidic nature in phenols. \(-\mathrm{NO}_{2}\) at ortho - position [i.e. structure (B)] forms hydrogen bond with \(-\mathrm{OH}\) group. Thus, structure (B) is less acidic than structure (A). On the other hand, electron releasing group bonded with the ring (i.e. \(-\mathrm{CH}_{3}\) ) decreases the acidic nature, thus structure (C) is less acidic than phenol. Hence, correct order of acidic nature is and option (2) is the correct
AIIMS - 2019
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323254
Given below are two statements : Statement (A) : p-nitrophenol is more acidic than m-nitrophenol and o-nitrophenol. Statement (B) : Ethanol will give immediate turbidity with Lucas reagent.
1 Statement A is correct but statement B is incorrect.
2 Statement A is incorrect but statement \(\mathrm{B}\) is correct.
3 Both Statements A and B are correct.
4 Both Statements A and B are incorrect.
Explanation:
\(\mathrm{NO}_{2}\) is an EWG and increases acidic strength of phenols. This effect is pronounced at para and ortho positions than at meta position. Thus, statement A is correct. Ethanol is a primary alcohol and gives turbidity after heating.
JEE - 2024
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323255
Which of the following is strongly acidic?
1 Phenol
2 o-Cresol
3 p-Nitrophenol
4 p-Cresol
Explanation:
In p-nitrophenol, \(-\mathrm{NO}_{2}\) group is an electron withdrawing which increases the acidic strength of phenols group.
323252
When benzene sulphonic acid and p-nitrophenol are treated with \(\mathrm{NaHCO}_{3}\), the gases released respectively are
1 \(\mathrm{SO}_{2}, \mathrm{NO}_{2}\)
2 \(\mathrm{SO}_{2}, \mathrm{NO}\)
3 \(\mathrm{SO}_{2}, \mathrm{CO}_{2}\)
4 \(\mathrm{CO}_{2}, \mathrm{CO}_{2}\)
Explanation:
\(\mathrm{CO}_{2}, \mathrm{CO}_{2}\). In both the cases, \(\mathrm{CO}_{2}\) gas is released from \(\mathrm{NaHCO}_{3}\)
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323253
Order of acidic nature
1 A \(>\) C \(>\) D \(>\) B
2 A \(>\) B \(>\) D \(>\) C
3 A \(>\) B \(>\) C \(>\) D
4 D \(>\) C \(>\) B \(>\) A
Explanation:
Presence of electron withdrawing group (i.e. \(-\mathrm{NO}_{2}\) ) increases the acidic nature in phenols. \(-\mathrm{NO}_{2}\) at ortho - position [i.e. structure (B)] forms hydrogen bond with \(-\mathrm{OH}\) group. Thus, structure (B) is less acidic than structure (A). On the other hand, electron releasing group bonded with the ring (i.e. \(-\mathrm{CH}_{3}\) ) decreases the acidic nature, thus structure (C) is less acidic than phenol. Hence, correct order of acidic nature is and option (2) is the correct
AIIMS - 2019
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323254
Given below are two statements : Statement (A) : p-nitrophenol is more acidic than m-nitrophenol and o-nitrophenol. Statement (B) : Ethanol will give immediate turbidity with Lucas reagent.
1 Statement A is correct but statement B is incorrect.
2 Statement A is incorrect but statement \(\mathrm{B}\) is correct.
3 Both Statements A and B are correct.
4 Both Statements A and B are incorrect.
Explanation:
\(\mathrm{NO}_{2}\) is an EWG and increases acidic strength of phenols. This effect is pronounced at para and ortho positions than at meta position. Thus, statement A is correct. Ethanol is a primary alcohol and gives turbidity after heating.
JEE - 2024
CHXII11:ALCOHOLS, PHENOLS AND ETHERS
323255
Which of the following is strongly acidic?
1 Phenol
2 o-Cresol
3 p-Nitrophenol
4 p-Cresol
Explanation:
In p-nitrophenol, \(-\mathrm{NO}_{2}\) group is an electron withdrawing which increases the acidic strength of phenols group.
