Chemistry Alcohols And Phenols Online Mcqs Test

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Question 1

1. Phenol is more acidic than alcohol due to:

Answer

High boiling point

Answer

High molecular weight

Answer

Resonance stabilization of phenoxide ion

Answer

Solubility in water

Question 2

2. What is the major product when phenol reacts with nitric acid?

Answer

o-Nitrophenol

Answer

Nitrobenzene

Answer

m-Nitrophenol

Question 3

3. What happens to alcohol in the presence of concentrated H₂SO₄ and heat?

Answer

Dehydration to form alkene

Answer

Halogenation

Answer

Esterification

Question 4

4. Which of the following reacts fastest in Lucas test?

Answer

Tert-butanol

Answer

2-propanol

Question 5

5. Which alcohol gives a positive iodoform test?

Answer

Benzyl alcohol

Question 6

6. Which of the following is most acidic?

Question 7

7. Which of the following can undergo both SN1 and E1 reactions?

Answer

Tertiary alcohol

Answer

Secondary alcohol

Answer

Primary alcohol

Question 8

8. Which of the following best distinguishes alcohols from phenols?

Answer

Alcohols have higher boiling point

Answer

Phenols give violet color with FeCl₃

Answer

Alcohols are colored

Answer

Phenols form ketones

Question 9

9. Which compound is more acidic?

Question 10

10. Which of the following statements is true?

Answer

Alcohols have aromatic rings

Answer

Alcohols react faster with bromine water

Answer

Phenols are more acidic than alcohols

Answer

Phenols undergo SN1 reactions

Question 11

11. Alcohols react with carboxylic acids to form:

Question 12

12. Which product is formed when ethanol is heated with acetic acid and concentrated H₂SO₄?

Answer

Acetic anhydride

Answer

Acetaldehyde

Answer

Ethyl acetate

Question 13

13. Which of the following is most reactive in dehydration to form alkenes?

Answer

Tert-butanol

Answer

2-propanol

Question 14

14. What is formed when phenol reacts with sodium metal?

Answer

Phenyl chloride

Answer

Sodium phenoxide

Question 15

15. Which alcohol can be oxidized to form a ketone?

Answer

2-propanol

Answer

Tert-butanol

Question 16

16. In the Lucas test, tertiary alcohols react:

Answer

Not at all

Answer

With heating only

Answer

Immediately at room temperature

Question 17

17. Which alcohol gives a positive iodoform test?

Answer

Benzyl alcohol

Question 18

18. Which of the following alcohols is miscible in water in all proportions?

Question 19

19. Which compound is more acidic?

Question 20

20. Which test is used to distinguish between alcohol and phenol?

Answer

Lucas test

Answer

Benedict’s test

Answer

Tollen’s test

Answer

Ferric chloride test

Question 21

21. What is the main difference between alcohol and phenol?

Answer

Alcohols contain carbonyl groups

Answer

Alcohols have aromatic rings

Answer

Phenols have –OH directly bonded to benzene

Answer

Phenols are saturated

Question 22

22. What is the main difference between alcohol and phenol?

Answer

Alcohols contain carbonyl groups

Answer

Phenols are saturated

Answer

Phenols have –OH directly bonded to benzene

Answer

Alcohols have aromatic rings

Question 23

23. Phenol is more acidic than alcohol due to:

Answer

High molecular weight

Answer

Resonance stabilization of phenoxide ion

Answer

Solubility in water

Answer

High boiling point

Question 24

24. Which alcohol is commonly used in hand sanitizers?

Answer

Propan-1-ol

Question 25

25. Alcohols differ from phenols in that alcohols:

Answer

Are aromatic

Answer

Do not show electrophilic aromatic substitution

Answer

Are more acidic

Answer

Are less soluble in water

Question 26

26. Which of the following is used in the manufacture of aspirin?

Answer

Acetic acid

Answer

Salicylic acid

Question 27

27. Phenol reacts with bromine water to give:

Answer

2-bromophenol

Answer

2,4,6-tribromophenol

Answer

4-bromophenol

Answer

Benzyl bromide

Question 28

28. Which reagent converts alcohols into alkyl halides?

Answer

Na₂CO₃

Answer

HCl/ZnCl₂

Question 29

29. What is the IUPAC name of phenol?

Answer

Benzyl alcohol

Answer

Benzene hydroxide

Answer

Hydroxybenzene

Question 30

30. Which alcohol is commonly used in hand sanitizers?

Answer

Propan-1-ol

Question 31

31. Which of the following reactions does phenol undergo easily?

Answer

Nucleophilic substitution

Answer

Free radical substitution

Answer

Addition reaction

Answer

Electrophilic aromatic substitution

Question 32

32. Which of the following has the highest boiling point?

Question 33

33. Which acid is used in esterification of alcohols?

Answer

Sulfuric acid

Answer

Nitric acid

Answer

Hydrochloric acid

Answer

Acetic acid

Question 34

34. What is the hybridization of oxygen in an alcohol molecule?

Question 35

35. What is formed when phenol reacts with sodium metal?

Answer

Sodium phenoxide

Answer

Phenyl chloride

Question 36

36. Which is more reactive towards electrophilic substitution?

Question 37

37. What is the hybridization of oxygen in an alcohol molecule?

Question 38

38. Which is more reactive towards electrophilic substitution?

Question 39

39. Which of the following can undergo both SN1 and E1 reactions?

Answer

Primary alcohol

Answer

Secondary alcohol

Answer

Tertiary alcohol

Question 40

40. Phenol reacts with bromine water to give:

Answer

2-bromophenol

Answer

2,4,6-tribromophenol

Answer

4-bromophenol

Answer

Benzyl bromide

Question 41

41. Which reaction forms phenol from benzene?

Answer

Sulfonation

Answer

Dow’s process (chlorobenzene + NaOH)

Answer

Friedel-Crafts alkylation

Question 42

42. Which of the following is not a method to prepare alcohols?

Answer

Reduction of carbonyl compounds

Answer

Hydroboration

Answer

Hydrolysis of alkyl halides

Answer

Nitration of alkanes

Question 43

43. Which alcohol cannot be oxidized to a carbonyl compound?

Answer

Tert-butanol

Answer

2-propanol

Question 44

44. Which of the following has the highest boiling point?

Question 45

45. Which of the following gives violet color with neutral FeCl₃?

Answer

2-propanol

Question 46

46. Which of the following is the correct IUPAC name for CH₃CH₂OH?

Answer

Ethyl alcohol

Question 47

47. Which of the following is most acidic?

Question 48

48. Which of the following reacts fastest in Lucas test?

Answer

Tert-butanol

Answer

2-propanol

Question 49

49. Which compound is formed when two alcohol molecules combine in acidic conditions?

Question 50

50. Which of the following is used in the manufacture of aspirin?

Answer

Salicylic acid

Answer

Acetic acid

Question 51

51. Alcohols react with carboxylic acids to form:

Question 52

52. In electrophilic substitution, phenol reacts most readily at:

Answer

Para and ortho positions

Answer

Only ortho position

Answer

Meta position

Answer

Only para position

Question 53

53. In the Lucas test, tertiary alcohols react:

Answer

Not at all

Answer

With heating only

Answer

Immediately at room temperature

Question 54

54. Which of the following alcohols is miscible in water in all proportions?

Question 55

55. Which reaction forms phenol from benzene?

Answer

Sulfonation

Answer

Dow’s process (chlorobenzene + NaOH)

Answer

Friedel-Crafts alkylation

Question 56

56. What happens to alcohol in the presence of concentrated H₂SO₄ and heat?

Answer

Halogenation

Answer

Esterification

Answer

Dehydration to form alkene

Question 57

57. Which of the following gives a neutral solution in water?

Answer

Acetic acid

Question 58

58. Alcohols differ from phenols in that alcohols:

Answer

Are less soluble in water

Answer

Are aromatic

Answer

Are more acidic

Answer

Do not show electrophilic aromatic substitution

Question 59

59. Which of the following alcohols is tertiary?

Answer

CH₃CH₂OH

Answer

CH₃CH(OH)CH₃

Answer

(CH₃)₃COH

Question 60

60. What functional group is present in alcohols?

Question 61

61. Which of the following will give a fruity smell on reaction with a carboxylic acid?

Question 62

62. Which of the following is most reactive in dehydration to form alkenes?

Answer

2-propanol

Answer

Tert-butanol

Question 63

63. Which alcohol can be oxidized to form a ketone?

Answer

2-propanol

Answer

Tert-butanol

Question 64

64. Which of the following best distinguishes alcohols from phenols?

Answer

Alcohols have higher boiling point

Answer

Phenols give violet color with FeCl₃

Answer

Phenols form ketones

Answer

Alcohols are colored

Answer 132

Hydrolysis of alkyl halides

Answer 133

Nitration of alkanes

Answer 134

Hydroboration

Answer 135

Reduction of carbonyl compounds

Answer 136

Addition reaction

Answer 137

Electrophilic aromatic substitution

Answer 138

Nucleophilic substitution

Answer 139

Free radical substitution

Answer 140

Alcohols have aromatic rings

Answer 141

Phenols are more acidic than alcohols

Answer 142

Alcohols react faster with bromine water

Answer 143

Phenols undergo SN1 reactions

Answer 144

Ethyl alcohol

Answer 145

Benedict’s test

Answer 146

Lucas test

Answer 147

Tollen’s test

Answer 148

Ferric chloride test

Answer 149

Benzyl alcohol

Answer 150

Benzene hydroxide

Answer 151

Hydroxybenzene

Answer 152

Quaternary

Answer 153

Ethylene glycol

Answer 154

CH₃CH(OH)CH₃

Answer 155

CH₃CH₂OH

Answer 156

(CH₃)₃COH

Answer 157

Friedel-Crafts alkylation

Answer 158

Dehydration

Answer 159

Esterification

Answer 160

HCl/ZnCl₂

Answer 161

Na₂CO₃

Answer 162

Quaternary

Answer 163

Electron-withdrawing

Answer 164

Electrically neutral

Answer 165

Electron-donating

Answer 166

Tert-butanol

Answer 167

2-propanol

Answer 168

m-Nitrophenol

Answer 169

o-Nitrophenol

Answer 170

Nitrobenzene

Answer 171

Ethylene glycol

Answer 172

Acetic anhydride

Answer 173

Ethyl acetate

Answer 174

Acetaldehyde

Answer 175

Electron-withdrawing

Answer 176

Electron-donating

Answer 177

Electrically neutral

Answer 178

Friedel-Crafts alkylation

Answer 179

Esterification

Answer 180

Dehydration

Answer 181

Acetic acid

Answer 182

Only ortho position

Answer 183

Meta position

Answer 184

Para and ortho positions

Answer 185

Only para position

Answer 186

Sulfuric acid

Answer 187

Nitric acid

Answer 188

Acetic acid

Answer 189

Hydrochloric acid

Answer 190

2-propanol

Total Questions:	98
Time Allowed:	40 Minutes
Total Marks:	98
How to Attempt Test:	Please choose the right Option in MCQ-type question.
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