MCQs – Alcohols, Phenols & Ethers

1. Which of the following will show hydrogen bonding?
a) CH₃–O–CH₃
b) CH₃–CH₂–OH
c) C₆H₆
d) CH₃Cl

2. The decreasing order of acidic strength is:
a) Water > Phenol > Alcohol
b) Phenol > Alcohol > Water
c) Phenol > Water > Alcohol
d) Alcohol > Phenol > Water

3. Which alcohol gives a yellow precipitate with iodine and NaOH (iodoform test)?
a) Ethanol
b) Methanol
c) n–propanol
d) Benzyl alcohol

4. Which one gives a violet colour with neutral FeCl₃ solution?
a) Ethanol
b) Phenol
c) Methanol
d) Diethyl ether

5. In Williamson synthesis, ethers are prepared by the reaction of:
a) Alcohol with halogen
b) Alcohol with alkyl halide in presence of base
c) Phenol with alkyl halide in presence of base
d) Both (b) and (c)

6. Phenol reacts with NaOH to form:
a) C₆H₅ONa
b) C₆H₆
c) C₆H₅Cl
d) C₆H₅NO₂

7. Phenol on reaction with conc. HNO₃ gives:
a) o–Nitrophenol
b) p–Nitrophenol
c) 2,4,6–Trinitrophenol
d) m–Nitrophenol

8. Which compound is used in the manufacture of Bakelite?
a) Phenol + Formaldehyde
b) Phenol + Acetaldehyde
c) Ethanol + Formaldehyde
d) Phenol + Methanol

9. Which is more acidic?
a) Ethanol
b) Phenol
c) Water
d) Methanol

10. Which of the following alcohols is tertiary?
a) CH₃CH₂CH₂OH
b) (CH₃)₂CH–OH
c) (CH₃)₃C–OH
d) CH₃OH

11. Phenol undergoes electrophilic substitution easily because:
a) –OH group decreases electron density
b) –OH group activates the ring towards electrophilic substitution
c) –OH group withdraws electrons
d) None of these

12. Phenol + Br₂ water gives:
a) p–Bromophenol
b) o–Bromophenol
c) 2,4,6–Tribromophenol
d) Bromobenzene

13. Lucas test is used to distinguish between:
a) Primary, secondary and tertiary alcohols
b) Alcohols and phenols
c) Alcohols and ethers
d) Primary and secondary alcohols only

14. The product formed when anisole (C₆H₅–OCH₃) reacts with HI is:
a) C₆H₅I + CH₃OH
b) C₆H₅OH + CH₃I
c) C₆H₆ + HI
d) C₆H₅I + CH₄

15. The IUPAC name of glycerol is:
a) Propan-1,2,3-triol
b) Propanol
c) Butan-1,2,3-triol
d) Ethane-1,2-diol

16. Which reagent is used to convert alcohols into aldehydes and ketones?
a) PCC (Pyridinium chlorochromate)
b) Zn/HCl
c) NaBH₄
d) LiAlH₄

17. When ethanol is treated with hot concentrated H₂SO₄, the major product is:
a) Ethene
b) Ethane
c) Ether
d) Acetaldehyde

18. Which one of the following is NOT an isomer of C₄H₁₀O?
a) Diethyl ether
b) Butan-1-ol
c) Butan-2-ol
d) Propan-2-ol

19. Phenol reacts with Zn dust to form:
a) Benzene
b) Toluene
c) Benzyl alcohol
d) Benzoic acid

20. Which of the following will have highest boiling point?
a) CH₃OH
b) CH₃–O–CH₃
c) C₂H₆
d) CH₃Cl

✅ Answer Key

  1. b
  2. c
  3. a
  4. b
  5. d
  6. a
  7. c
  8. a
  9. b
  10. c
  11. b
  12. c
  13. a
  14. b
  15. a
  16. a
  17. a
  18. d
  19. a
  20. a

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