12th Class Chemistry Chapter 11 MCQs with Answers

The 12th Class Chemistry Chapter 11 MCQs with Answers: “Alcohols, Phenols, and Ethers” invites us to explore the fascinating world of organic compounds known as alcohols, phenols, and ethers. Within this captivating chapter, we delve into the unique properties, structures, and reactions of these compounds.

12th Class Chemistry Chapter 11 MCQs with Answers

Prepare to embark on a journey where we unravel the secrets of alcohols, phenols, and ethers. We delve into the understanding of compounds containing hydroxyl (-OH) groups, exploring their significant contributions to the field of organic chemistry.

Our exploration extends to the concept of bonding in these compounds, including the polarity of the hydroxyl group and its impact on their reactivity. We study the different types of alcohols, phenols, and ethers, understanding their structural features and properties.

The chapter further unveils the significance of various reactions of alcohols, phenols, and ethers, including oxidation, esterification, and etherification reactions. We explore their applications in the synthesis of organic compounds, pharmaceuticals, and industrial processes.

Through practical examples, demonstrations, and real-life applications, we enhance our understanding of alcohols, phenols, and ethers. We analyze their role in biological systems, their uses as solvents, and their significance in the production of various consumer products.

Studying “Alcohols, Phenols, and Ethers” in the 12th Class Chemistry curriculum nurtures critical thinking skills, analytical reasoning, and a deeper understanding of the unique characteristics of these compounds. It equips us with the tools to comprehend and appreciate the complexities of alcohols, phenols, and ethers, their reactions, and their impact on various aspects of our lives. So let us embark on this enlightening journey, where we explore the captivating realm of alcohols, phenols, and ethers, unraveling its secrets and expanding our understanding of the dynamic world of organic chemistry.

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