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| Chemistry 12th Chapter 11 - Alcohols, Phenols and Ethers Questions |
Chemistry 2nd Year Chapter 11 - Alcohols, Phenols and Ethers Solved MCQs, Important Short Questions and Long Questions Bank
MCQs
Please select the right answer.
1. 100 percent pure alcohol is called:
2. 2 – Hydroxy propanoic acid is called:
3. 2-Alkanol on oxidation forms:
4. 95 percent ethanol is called:
5. According to Lewis concept ethers behaves as:
6. Alcohol obtained by fermentation never exceeds:
7. Alcohols and ------react to produce esters:
8. Alcohols of low molecular weight are:
9. Alcohols on heating with ------give alkenes at high temperature:
10. Aldehydes after catalytic reduction change to:
11. Bakelite is formed when phenol reacts with:
12. Bakelite is thermosetting plastic, it is formed by the polymerization of:
13. C₂H₅OH can be differentiated from CH₃OH by:
14. Carbolic acid is the other name of:
15. Diethyl ether can be decomposed by heating with:
16. Dow’s method helps in preparation of:
17. Ethanol and methanol can be distinguished by
18. Ethanol can be converted into ethanoic acid by:
19. Ethanol containing some quantity of methanol is called:
20. Ethanol reacts with sodium metal to liberate:
21. Ethers reacts with hydrogen iodide to give:
22. Ethers show the phenomena of:
23. Ethyl alcohol is industrially prepared from ethylene by:
24. Ethyl alcohol on oxidation with acidified K₂Cr₂O₇ gives:
25. Fermentation is a:
26. H₂SO₄ at 140 ⁰C yields:
27. Hydrolytic conversion of Sucrose into glucose and fructose in known as:
28. Isopropyl alcohol on oxidation gives:
29. Methanol can be prepared from hydrogenation of:
30. Methyl alcohol is not used:
31. Methyl alcohol is used as:
32. Na reacts with Ethanol to produce:
33. Only maximum------ percent alcohol is obtained by fermentation of molasses:
34. Order of reactivity of alcohols when C-O bond breaks is:
35. Organic acidic compound without a carboxylic acid group is:
36. Oxidation of ------alcohol gives aldehyde:
37. Phenol is also called:
38. Phenol reacts with acetyl chloride in the presence of a base to form an:
39. Phenol reacts with zinc dust and forms:
40. Picric acid is:
41. The conversion of ethanol to ethene is an example of:
42. The correct name of H₂C = CH − CH₂ − CH₂ − OH is:
43. The hydrolysis of sugar is called:
44. When 2-pentanol undergoes oxidation the product is:
45. When diethyl ether is treated with PCl₅ the product is:
46. When Ether is protonated, the conjugate acid formed is called:
47. When ethyl bromide (C₂H₅Br) is heated with Ag₂O in the abscence of moisture the product formed is:
48. When phenol react with alkali it forms:
49. Which compound is called a universal solvent?
50. Which compound is more soluble in water?
51. Which compound will have maximum repulsion with H₂O?
52. Which enzyme is not involved in fermentation of starch
53. Which inorganic reagent may be used to distinguish between phenol and methanol:
54. Which liquid is called wood spirit?
55. Which of the following alcohol is commonly used as anti-freeze:
56. Which of the following alcohol is least soluble in water:
57. Which of the following alcohol is used in the perfumes and for flavouring:
58. Which of the following compound has no unsaturation:
59. Which of the following compound should have lowest boiling point:
60. Which of the following give iodoform test:
61. Which of the following is more reactive where O − H bonds break:
62. Which of the following is more reactive:
63. Which of the following is the most suitable method for removing the traces of water from ethanol:
64. Which of the following is the weakest acid:
65. Which of the following reagent will replace –OH group of alcohol by halogen atoms?
66. Which of the following statements is correct:
67. Which of the following will have the highest boiling point:
68. Which of the following would you expect to give a yellow precipitate of CHl3 when heated with l2 in alkaline solution:
69. Which one is primary alcohol:
70. Which statement is incorrect about phenol:
71. Which substance is used as an Antifreeze:
72. Williamsons synthesis is used for the synthesis of:
Short Questions
1. Absolute alcohol cannot be prepared by fermentation process.Why?
2. Conc.HNO₃ reacts with phenol to give picric acid?How?
3. Define activation energy and activated complex.
4. Define and give an example of the process of activation of a catalyst.
5. Define and give examples for each of monohydric dihydric and trihydric alcohols?
6. Define homogeneous catalysis. Give two examples.
7. Define order of reaction with the help of an example.
8. Define rate of chemical reaction and give its units.
9. Define specific rate constant. Give equation to support your answer.
10. Define with example 2nd order reaction?
11. Enzymes are specific in action. Justify.
12. Ethanol gives different products with conc.H₂SO₄ under different conditions?
13. Ethers are less reactive than alcohois. Justify?
14. Ethers belong to an inert class of organic compounds.Discuss?
15. Ethyl alcohol is a liquid while methyl chloride is a gas. Given reason?
16. Give physical properties of phenol?
17. Give the mechanism of the reaction of halogen acids with ethers?
18. Give the uses of diethyl ether?
19. Give the uses of ethyl alcohol?
20. Give the uses of methyl alcohol?
21. Give the uses of phenol?
22. How benzene sulphonic acid can be converted into phenol?
23. How chlorobenzene is converted into phenol?
24. How do acids react with ethers to give oxonium ions?
25. How do you compare phenol and ethyl alcohol?
26. How does a catalyst affect a reversible reaction?
27. How enthalpy change of a reaction and energy of activation are distinguished?
28. How halodoform test can be used to distinguish between methyl alcohol and ethyl alcohol?
29. How haloform reation can be used to distinguish between certain alcohols?
30. How phenol can be converted into benzene?
31. How primary secondary and tertiary alcohols are different from each other in structures?
32. How silver oxide reacts with alkyl halides to give ethers?
33. How surface area affects the rate of reaction? Give one example.
34. How the resonance structures of phenoxide ion make phenol acidic?
35. How the strong strong oxidizing agents affects the primary and secondary alcohols?
36. How water gas is converted into methyl alcohol scale?
37. The radioactive decay is always a first order reaction. Give reason.
38. What ar three important dihydro benzenes?Give their IUPAC names and old names?
39. What are enzymes? How they act as catalysts?
40. What are mixed ethers? Give examples?
41. What are structures of carbolic acid and picric acid?
42. What are the dehydrogenation products of primary and secondary alcohols in the presence of copper?
43. What do you mean by activation energy of a reaction?
44. What do you mean by denaturing of alcohol?
45. What happens to the rate of chemical reaction with the passage of time?
46. What important polymer is produced by the reaction of phenol with methanal?
47. What is auto catalyst? Give an example.
48. What is catalytic poisoning? Give two examples.
49. What is esterification?Give the reaction comditions for this reaction?
50. What is fermentation process for manufacture of alcohols?Give the necessary conditions?
51. What is half life period? Give example.
52. What is Lucas test which is used to distinguish between primary secondary and tertiary alcohols?
53. What is raw material for the manufacture of ethyl alcohol on the commercial scale?
54. What is rectified spirit commercial alcohol and absolute alcohol?
55. What is specific rate constant or velocity constant?
56. What is the reaction of bromine water with phenol?
57. What is the similarity of water with alcohols phenols and ethers?
58. What is williamson’s synthesis of ethers?
59. Why alcohol is miscible with water?
60. Why ethanol has higher boiling point than diethyl ether but less than water?
61. Why phenol is acidic but alcohol is not?How do you compare H₂O with them?
62. Write down any two characteristics of enzyme catalysis.
Long Questions
1. How ethyl alcohol is obtained by the fermentation of molasses and starch.
2. Give industrial preparation of ethyl alcohol.
3. How methanol is prepared in industry?
4. Convert methanol to ethanol and ethanol to methanol.
5. Prepare ethyl acetate, Ethanol, ethane and diethyl ether from ehthanol.
6. Write the Chemical reactions of C₂H₅OH followings with conditions.
(i) HCI (ii) NH₃ (iii) SOCI₂
7. Explain the following terms using ethyl alcohol:
Oxidation, Dehydration
8. Describe reactions of ethanol and propanone with (i) Hydroxylamine (ii) Phenylhydrazine
9. Describe the ease of dehydration of primary, secondary and tertiary alcohol with suitable reagent
10. How does ethyl alcohol react with following reagents:
(i) Conc.H₂SO₄ (ii) Na (iii) CH₃COOH (iv) SOCI₂
11. How will you distinguish between primary, secondary and tertiary alcohols? Explain with reactions.
12. Write two methods for the preparation of phenol. How does phenol react with: (i) Con. HNO₃ (ii) Bromine water
13. What is Dow's method for the preparation of Phenol? Explain acidic behaviour of phenol.
14. How Phenol reacts with:
(i) Zn (ii) NaOH (iii) HNO₃ (iv) H₂SO₄ (v) bromine water
15. Write the chemical reaction of phenol with following.
(i) NaOH (ii) Zn (iii) CH₃COCI (iv) H₂
16. Describe any four chemical reactions of carbolic acid.
17. Write down two methods for preparing phenol. What is the reaction of phenol with (i) Zn (ii) Br₂ water
18. Give the reaction of phenol with: (i) HNO₃ (ii) H₂SO₄ (iii) CH₃COCl
19. How will you convert ethane into
(i) ethyl alcohol (ii) ethylene epoxide
(iii) ethylene glycol (iv) ethylene chlorohydrins?
20. How will you convert:
(i) Ethanol into Methanol (ii) Ethanol into Ethanol
(iii) Ethanol into Ethene (iv) Ethanol into diethyl ether
21. How ethers are prepared and how do they react with hydrogen iodide?
22. Write structural formula of:
(i) Glycerol (ii) Carbolic acid
(iii) Sodium Ethoxide (iv) Propoxy propane
23. How are monohydric alcohols classified? Write preparation of ethyl alcohol from molasses.
24. How is methyl alcohol obtained on large scale from water gas? Draw diagram also.
25. Write reactions of phenol with (1) HNO₃/Δ (II) H₂SO₄ (Conc) (III) Br₂ (iv) CH₃COCI
26. How is methyl alcohol is obtained on large scale? How Is it distinguished from ethyl alcohol.
27. Give the preparation of methyl alcohol on large scale.
28. Write reactions of alcohol in which C-O bond and O-H bond breaks (Two reactions in each case)
29. How phenol is prepared from (i) Chlorobenzene (ii) Sodlum salt of Benzene Sulphonic Acid