Free Phenols MCQs with Answers
63 Phenols MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Phenols contain a hydroxyl group directly bonded to an aromatic ring, making them more acidic than alcohols because the phenoxide ion is resonance-stabilised. Reactions include ionisation with bases, electrophilic substitution, bromination, nitration and oxidation, with attention to the difference between phenols and aliphatic alcohols.
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63 questions · page 2 of 4
- A. Reaction with sodium metal only
- B. Oxidation of phenol only
- C. Both A and B
- D. Neither A nor B
Explanation: The explanation for this question will be added soon!
Correct answer: Both A and B- A. Resorcinol
- B. Aspirin
- C. Picric acid
- D. Mesitol
Explanation: The structure shown above is of Picric acid.
Correct answer: Picric acid- A. Option A
- B. Option B.
- C. Option C
- D. Option D
- E. Option E
Explanation: This structure is just a factual recall:
Correct answer: Option E- A. It is colourless crystalline molecular solid
- B. It is poisonous in nature
- C. It is used as a disinfectant in hospitals and washrooms
- D. It is sparingly soluble in water
Explanation: Phenol typically appears as a white crystalline solid, but it can also be colorless in its pure form.
Correct answer: It is colourless crystalline molecular solid- A. p-Cresol
- B. Catechol
- C. Resorcinol
- D. Quinol
Explanation: The explanation for this question will be added soon!
Correct answer: p-Cresol- A. Option A
- B. Option B
- C. Option C
- D. Option D
Explanation: The explanation for this question will be added soon!
Correct answer: Option B- A. Mesitylene
- B. Resorcinol
- C. Durene
- D. Anthracene
Explanation: The common name of 1,3-dihydroxybenzene is Resorcinol. The other options are different aromatic compounds:Mesitylene…
Correct answer: Resorcinol- A. Cumene
- B. Toluene
- C. Benzene
- D. Aniline
Explanation: The compound that forms phenol when oxidized by atmospheric oxygen in the presence of a metal catalyst is cumene (isopropylbenzene).
Correct answer: Cumene- A. Williamson synthesis
- B. Cannizzaro reaction
- C. Aldol reaction
- D. Kolbe-Schmitt reactio
Explanation: The reaction of the sodium salt of phenol with CO₂ is called the Kolbe-Schmitt reaction.
Correct answer: Kolbe-Schmitt reactio- A. Picric acid
- B. Resorcinol
- C. Catechol
- D. P-Cresol
- E. Hydroquinone
Explanation: The explanation for this question will be added soon.
Correct answer: P-Cresol- A. Oxidation
- B. Reduction
- C. Dehydroxylation
- D. Dehydrogenation
Explanation: Benzene can be prepared from phenols too through their reduction. In this process, vapors of phenol are passed over heated zinc dust.
Correct answer: Reduction- A. Lucas test
- B. Halogenation
- C. Nitration
- D. Iodoform
Explanation: Phenols react with bromine water to give a white ppt. of 2,4,6-tribromophenol. Alcohols do not have any action with bromine water.
Correct answer: Halogenation- A. Reduction with hydrogen in the presence of Ni
- B. Reduction with zinc
- C. Reduction with alkali
- D. Reduction wilh acids
Explanation: Phenols, on heating with Zn dust yield aromatic hydrocarbons.
Correct answer: Reduction with zinc- A. Colorless crystalline solid
- B. White crystalline deliquescent solid
- C. Colorless amorphous solid
- D. Colorless amorphous deliquescent solid
Explanation: Pure phenol is a white crystalline solid, smelling of disinfectant.
Correct answer: White crystalline deliquescent solid- A. Lucas test
- B. Halogenations
- C. Nitration
- D. Idoform test
Explanation: phenol forms white precipitates when reacted with Bromine while alcohol does notP
Correct answer: Halogenations- A. Carpolic acid
- B. Carbonylic acid
- C. Carbolic acid
- D. Carbolylic acid
Explanation: The other name for phenol is Carbolic acid.
Correct answer: Carbolic acid- A. Delocalization of negative charge in OH group
- B. Delocation of positive charge on the carbon atom in ring
- C. Delocalization of negative charge in the ring
- D. Delocalization of positive charge in the OH group
Explanation: Phenol is more acidic than alcohols due to stabilisation of phenoxide ion through resonance of negative charge in the ring.
Correct answer: Delocalization of negative charge in the ring- A. Salicylic acid
- B. Picric acid
- C. Cresol
- D. O-nitrophenol
Explanation: Option A: Salicylic acid is a phenol derivative with a hydroxyl group (-OH) attached to an aromatic ring.
Correct answer: Picric acid39. Which of the following major product(s) is formed when phenol reacts with sulphuric acid at 100 °C?
- A. Ortho-hydroxy benzene sulphonic acid
- B. Para-hydroxy benzene sulphonic acid
- C. Meta-hydroxybenzene sulphonic acid
- D. Both a and b
Explanation: The reaction of phenol with concentrated sulphuric acid is thermodynamically controlled.
Correct answer: Para-hydroxy benzene sulphonic acid- A. OH group
- B. Phenoxide ion
- C. Benzene ring
- D. All of these options are correct
Explanation: OPTION A: Phenol is an aromatic alcohol, and the presence of a hydroxyl (OH) group in the molecule makes it an electrophilic substrate.
Correct answer: OH group