Phenol MCQ

Phenol & Derivatives – 25 MCQs

1. Phenol is also known as:

A. Ethanoic acid

B. Carbolic acid

C. Toluene

D. Acetophenone

Answer: B

2. In Dow’s process, phenol is formed from:

A. Nitrobenzene

B. Benzene

C. Chlorobenzene

D. Benzoic acid

Answer: C

3. Dow’s process requires:

A. NaOH (cold)

B. NaOH (hot, 300°C)

C. HCl and FeCl₃

D. HNO₃

Answer: B

4. Phenol turns violet with:

A. NaCl

B. FeCl₃

C. KMnO₄

D. NH₄Cl

Answer: B

5. Phenol is more acidic than alcohols because of:

A. Steric hindrance

B. Resonance stabilization of phenoxide ion

C. Hydrogen bonding

D. Weak bond strength

Answer: B

6. Phenol + NaOH gives:

A. Benzene

B. Sodium phenoxide

C. Sodium benzoate

D. Nitrobenzene

Answer: B

7. Which reagent gives white fumes with phenol?

A. NaOH

B. NH₃

C. PCl₅

D. CHCl₃

Answer: C

8. Phenol reacts with CHCl₃ and NaOH to form:

A. Benzaldehyde

B. Salicylaldehyde

C. Acetone

D. Salicylic acid

Answer: B (Reimer-Tiemann Reaction)

9. Kolbe reaction is used to prepare:

A. Aspirin

B. Salicylaldehyde

C. Phenyl acetate

D. Salicylic acid

Answer: D

10. Reagents used in Kolbe’s reaction:

A. CHCl₃ + NaOH

B. CO₂ + NaOH

C. Cl₂ + Fe

D. NaNO₂ + HCl

Answer: B

11. In aspirin synthesis, salicylic acid reacts with:

A. Acetic anhydride

B. Benzoic acid

C. Toluene

D. Ethanol

Answer: A

12. In Reimer-Tiemann reaction, the intermediate is:

A. Carbocation

B. Carbene

C. Diazonium

D. Anion

Answer: B

13. Ferric chloride test confirms:

A. Alcohols

B. Carboxylic acids

C. Phenols

D. Aldehydes

Answer: C

14. Which of the following forms acetyl salicylic acid?

A. Paracetamol

B. Phenol

C. Salicylic acid

D. Aniline

Answer: C

15. Which compound gives violet color with FeCl₃?

A. Benzene

B. Toluene

C. Ethanol

D. Phenol

Answer: D

16. What is the product of phenol + Cl₂ in the presence of Fe³⁺ catalyst?

A. Chlorobenzene

B. 2,4,6-Trichlorophenol

C. Benzoyl chloride

D. Benzaldehyde

Answer: B

17. What happens to phenol’s acidity when an electron-withdrawing group is added?

A. Increases

B. Decreases

C. No change

D. Neutralizes

Answer: A

18. Aspirin belongs to which functional group class?

A. Alcohol

B. Ester

C. Ether

D. Amide

Answer: B

19. Which acid is used in forming paracetamol?

A. Acetic acid

B. Hydrochloric acid

C. Ethanoic anhydride

D. Nitric acid

Answer: C

20. Para-hydroxy acetanilide is another name for:

A. Phenol

B. Aspirin

C. Paracetamol

D. Aniline

Answer: C

21. Phenol reacts with diazonium salt to form:

A. Ester

B. Aldehyde

C. Azo dye

D. Alkene

Answer: C

22. Which of these reactions forms 4-amino phenol?

A. Diazotization

B. Nitration → Reduction

C. Friedel-Crafts

D. Oxidation

Answer: B

23. What’s the final product of phenol + CH₃COOH (with catalyst)?

A. Salicylic acid

B. Acetophenone

C. Aspirin

D. Benzoic acid

Answer: C

24. Which group deactivates phenol ring for electrophilic substitution?

A. -NO₂

B. -CH₃

C. -OH

D. -NH₂

Answer: A

25. Phenol shows electrophilic substitution reactions mainly at:

A. Meta position

B. Para and ortho positions

C. Only para

D. Only ortho

Answer: B