12th Class Chemistry Mcqs With Answers Chapter 11|2nd Year chemistry mcqs with answers pdf

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12th Class Chemistry Mcqs With Answers Chapter 1


Chapter No 11

Alcohols Phenols And Ethers

1. Williamsons synthesis is used for the synthesis of choose which one is correct:

  1. Phenol
  2. Alcohol
  3. Ether
  4. Aldehyde

2. Aldehydes after catalytic reduction change to choose which one is correct:

  1. P° alcohol
  2. S° alcohol
  3. T° alcohol
  4. P° and S° alcohol 

3. When ether is protonated, the conjugate acid formed is called choose which one is correct:

  1. An oxonium ion
  2. Carbanion
  3. An oxide ion
  4. A hydration ion

4. Which of the following alcohol is commonly used as anti-freeze choose which one is correct:

  1. Methanol
  2. Ethanol
  3. Ethylene glycol
  4. All of the above

5. Which of the following will have the highest boiling point choose which one is correct:

  1. Methanal
  2. Ethanal
  3. Propanal
  4. 2-hexanone

6. 95% ethanol is called choose which one is correct:

  1. Absolute alcohol
  2. Rectified spirit
  3. Methylated spirit
  4. Wood spirit

7. Which of the following alcohol is used in the perfumes and for flavouring choose which one is correct:

  1. Methanol
  2. Ethanol
  3. 1-propanol
  4. 1-butanol

8. According to Lewis concept ethers behaves as choose which one is correct:

  1. Acid
  2. Base
  3. Acid as well as base
  4. None of above

9. Which enzyme is not involved in fermentation of starch choose which one is correct:

  1. Diastase
  2. Zymase
  3. Urease
  4. Maltase

10. The hydrolysis of sugar is called choose which one is correct:

  1. Condensation
  2. Polymerization
  3. Inversion
  4. Reduction

11. Which compound shows maximum hydrogen bonding with water choose which one is correct:

  1. C6H5OH
  2. C2H5OH
  3. CH3 − O − CH3
  4. n-hexanol

12. Which statement is incorrect about phenol choose which one is correct:

  1. It is colourless, crystalline poisonous solid
  2. It does not turn blue litmus paper red
  3. It liberates CO2 gas from carbonate
  4. Above 65.9°C it is miscible wither water

13. Which of the following is the weakest acid choose which one is correct:

  1. Phenol
  2. Alcohol
  3. Carboxylic acid
  4. Water

14. Which inorganic reagent may be used to distinguish between phenol and  methanol choose which one is correct:

  1. Alkaline aqueous I2
  2. Aqueous NaHCO3
  3. K2Cr2O7 in dil. H2SO4
  4. Na

15. Phenol is also called choose which one is correct:

  1. Carbonic acid
  2. Carbolic acid
  3. Carboxylic acid
  4. Fatty acid

16. Which of the following give iodoform test choose which one is correct:

  1. CH3OH
  2. C2H5OH
  3. Methanal
  4. 1-propanol

17. Which of the following is more reactive where O − H bonds break choose which one is correct:

  1. P° alcohol
  2. S° alcohol
  3. T° alcohol
  4. Cannot be predicted

18. Which of the following alcohol is least soluble in water choose which one is correct:

  1. CH3OH
  2. C2H5OH
  3. C3H7OH
  4. C4H9OH

19. 100% pure alcohol is called choose which one is correct:

  1. Methylated spirit
  2. Rectified spirit
  3. Power alcohol
  4. Absolute alcohol

20. The correct name of H2C = CH − CH2 − CH2 − OH is choose which one is correct:

  1. 1-butene-4-ol
  2. 2-butene-1-ol
  3. 3-butene-1-ol
  4. None of these

21. Which of the following is more reactive choose which one is correct:

  1. Benzene
  2. Phenol
  3. Nitrobenzene
  4. Benzoic acid

22. Bakelite is thermosetting plastic, it is formed by the polymerization of choose which one is correct:

  1. Ethanol and formaldehyde
  2. Phenol and ethanol
  3. Phenol and formaldehyde
  4. Phenol and acetaldehyde

23. Which of the following compound should have lowest boiling point choose which one is correct:

  1. C2H6
  2. C2H5Cl
  3. CH3 − O − CH3
  4. C2H5OH

24. Ethanol can be converted into ethanoic acid by choose which one is correct:

  1. Hydrogenation
  2. Fermentation
  3. Oxidation
  4. Hydration

25. When 2-pentanol undergoes oxidation the product is choose which one is correct:

  1. Pentanol
  2. 3-pentanone
  3. 2-pentanone
  4. Pentanoic acid

26. When ethyl bromide (C2H5Br) is heated with Ag2O in the abscence of  moisture the product formed is choose which one is correct:

  1. Ethanol
  2. Diethyl ether
  3. Ethanal
  4. Ethene

27. Which of the following compound has no unsaturation choose which one is correct:

  1. Methanal
  2. Methoxy methane
  3. Phenol
  4. Benzoic acid

28. The conversion of ethanol to ethene is an example of choose which one is correct:

  1. Dehydration
  2. Hydration
  3. Hydrogenation
  4. Fermentation

29. Ethanol reacts with sodium metal to liberate choose which one is correct:

  1. CO2 gas
  2. H2 gas
  3. CO gas
  4. Steam

30. Diethyl ether can be decomposed by heating with choose which one is correct:

  1. HI
  2. NaOH
  3. Water
  4. KMnO4

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