Chemistry Alcohols And Phenols Online Mcqs Test

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Question 1

1. Which of the following alcohols is tertiary?

Answer

CH₃CH₂OH

Answer

CH₃CH(OH)CH₃

Answer

(CH₃)₃COH

Question 2

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

Answer

Dehydration to form alkene

Answer

Halogenation

Answer

Esterification

Question 3

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

Question 4

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

Answer

Acetaldehyde

Answer

Acetic anhydride

Answer

Ethyl acetate

Question 5

5. Which of the following is most acidic?

Question 6

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

Question 7

7. What functional group is present in alcohols?

Question 8

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

Answer

2-propanol

Answer

Tert-butanol

Question 9

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

Answer

Tert-butanol

Answer

2-propanol

Question 10

10. In the Lucas test, tertiary alcohols react:

Answer

Not at all

Answer

Immediately at room temperature

Answer

With heating only

Question 11

11. 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

Question 12

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

Answer

Addition reaction

Answer

Free radical substitution

Answer

Electrophilic aromatic substitution

Answer

Nucleophilic substitution

Question 13

13. Which reagent can oxidize a primary alcohol to a carboxylic acid?

Question 14

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

Answer

o-Nitrophenol

Answer

m-Nitrophenol

Answer

Nitrobenzene

Question 15

15. Which type of alcohol forms esters most readily?

Question 16

16. Which class of alcohol is CH₃CH₂CH₂OH?

Answer

Quaternary

Question 17

17. Which of the following statements is true?

Answer

Alcohols have aromatic rings

Answer

Phenols are more acidic than alcohols

Answer

Phenols undergo SN1 reactions

Answer

Alcohols react faster with bromine water

Question 18

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

Answer

Tert-butanol

Answer

2-propanol

Question 19

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

Answer

Benedict’s test

Answer

Tollen’s test

Answer

Lucas test

Answer

Ferric chloride test

Question 20

20. Which reagent converts alcohols into alkyl halides?

Answer

HCl/ZnCl₂

Answer

Na₂CO₃

Question 21

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

Answer

Ethyl alcohol

Question 22

22. Which reaction forms phenol from benzene?

Answer

Sulfonation

Answer

Dow’s process (chlorobenzene + NaOH)

Answer

Friedel-Crafts alkylation

Question 23

23. Which reagent can oxidize a primary alcohol to a carboxylic acid?

Question 24

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

Answer

Tollen’s test

Answer

Ferric chloride test

Answer

Lucas test

Answer

Benedict’s test

Question 25

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

Question 26

26. Phenol is more acidic than alcohol due to:

Answer

High boiling point

Answer

High molecular weight

Answer

Solubility in water

Answer

Resonance stabilization of phenoxide ion

Question 27

27. Which compound is more acidic?

Question 28

28. Which of the following statements is true?

Answer

Phenols are more acidic than alcohols

Answer

Alcohols have aromatic rings

Answer

Phenols undergo SN1 reactions

Answer

Alcohols react faster with bromine water

Question 29

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

Answer

Para and ortho positions

Answer

Meta position

Answer

Only ortho position

Answer

Only para position

Question 30

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

Answer

Hydroboration

Answer

Nitration of alkanes

Answer

Hydrolysis of alkyl halides

Answer

Reduction of carbonyl compounds

Question 31

31. Which alcohol gives a positive iodoform test?

Answer

Benzyl alcohol

Question 32

32. Which of the following reactions is not typical for alcohols?

Answer

Friedel-Crafts alkylation

Answer

Dehydration

Answer

Esterification

Question 33

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

Answer

Tert-butanol

Answer

2-propanol

Question 34

34. In the Lucas test, tertiary alcohols react:

Answer

Not at all

Answer

With heating only

Answer

Immediately at room temperature

Question 35

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

Answer

Phenols give violet color with FeCl₃

Answer

Phenols form ketones

Answer

Alcohols are colored

Answer

Alcohols have higher boiling point

Question 36

36. What is the IUPAC name of phenol?

Answer

Benzene hydroxide

Answer

Benzyl alcohol

Answer

Hydroxybenzene

Question 37

37. Which alcohol gives a positive iodoform test?

Answer

Benzyl alcohol

Question 38

38. Which reagent converts alcohols into alkyl halides?

Answer

Na₂CO₃

Answer

HCl/ZnCl₂

Question 39

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

Answer

Tertiary alcohol

Answer

Primary alcohol

Answer

Secondary alcohol

Question 40

40. Which class of alcohol is CH₃CH₂CH₂OH?

Answer

Quaternary

Question 41

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

Answer

Alcohols have aromatic rings

Answer

Phenols are saturated

Answer

Phenols have –OH directly bonded to benzene

Answer

Alcohols contain carbonyl groups

Question 42

42. Which of the following is an example of a dihydric alcohol?

Answer

Ethylene glycol

Question 43

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

Answer

Acetic acid

Question 44

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

Answer

Halogenation

Answer

Dehydration to form alkene

Answer

Esterification

Question 45

45. The –OH group in phenol makes it:

Answer

Electron-donating

Answer

Electrically neutral

Answer

Electron-withdrawing

Question 46

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

Answer

2-propanol

Question 47

47. Alcohols differ from phenols in that alcohols:

Answer

Are more acidic

Answer

Are aromatic

Answer

Are less soluble in water

Answer

Do not show electrophilic aromatic substitution

Question 48

48. Which type of alcohol forms esters most readily?

Question 49

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

Answer

2-propanol

Answer

Tert-butanol

Question 50

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

Answer

Sodium phenoxide

Answer

Phenyl chloride

Question 51

51. Which is more reactive towards electrophilic substitution?

Question 52

52. What functional group is present in alcohols?

Question 53

53. Phenol reacts with acetic anhydride to form:

Question 54

54. Alcohols react with carboxylic acids to form:

Question 55

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

Answer

Ethyl alcohol

Question 56

56. Alcohols differ from phenols in that alcohols:

Answer

Are more acidic

Answer

Are aromatic

Answer

Are less soluble in water

Answer

Do not show electrophilic aromatic substitution

Question 57

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

Answer

Nitrobenzene

Answer

m-Nitrophenol

Answer

o-Nitrophenol

Question 58

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

Question 59

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

Answer

Ethyl acetate

Answer

Acetic anhydride

Answer

Acetaldehyde

Question 60

60. Which of the following reactions is not typical for alcohols?

Answer

Esterification

Answer

Dehydration

Answer

Friedel-Crafts alkylation

Question 61

61. Which of the following is most acidic?

Question 62

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

Answer

Acetic acid

Question 63

63. Phenol reacts with bromine water to give:

Answer

2-bromophenol

Answer

2,4,6-tribromophenol

Answer

Benzyl bromide

Answer

4-bromophenol

Question 64

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

Answer

2-propanol

Answer 129

Sulfonation

Answer 130

Dow’s process (chlorobenzene + NaOH)

Answer 131

Friedel-Crafts alkylation

Answer 132

2-propanol

Answer 133

Tert-butanol

Answer 134

Acetic acid

Answer 135

Salicylic acid

Answer 136

Hydroxybenzene

Answer 137

Benzyl alcohol

Answer 138

Benzene hydroxide

Answer 139

Nitration of alkanes

Answer 140

Hydroboration

Answer 141

Hydrolysis of alkyl halides

Answer 142

Reduction of carbonyl compounds

Answer 143

CH₃CH(OH)CH₃

Answer 144

CH₃CH₂OH

Answer 145

(CH₃)₃COH

Answer 146

Benzyl bromide

Answer 147

2-bromophenol

Answer 148

2,4,6-tribromophenol

Answer 149

4-bromophenol

Answer 150

Para and ortho positions

Answer 151

Only ortho position

Answer 152

Meta position

Answer 153

Only para position

Answer 154

Phenyl chloride

Answer 155

Sodium phenoxide

Answer 156

Ethylene glycol

Answer 157

High molecular weight

Answer 158

Solubility in water

Answer 159

High boiling point

Answer 160

Resonance stabilization of phenoxide ion

Answer 161

Propan-1-ol

Answer 162

Tertiary alcohol

Answer 163

Secondary alcohol

Answer 164

Primary alcohol

Answer 165

Salicylic acid

Answer 166

Acetic acid

Answer 167

2-propanol

Answer 168

Tert-butanol

Answer 169

2-propanol

Answer 170

Tert-butanol

Answer 171

Propan-1-ol

Answer 172

Electrically neutral

Answer 173

Electron-donating

Answer 174

Electron-withdrawing

Answer 175

Electrophilic aromatic substitution

Answer 176

Addition reaction

Answer 177

Free radical substitution

Answer 178

Nucleophilic substitution

Answer 179

Hydrochloric acid

Answer 180

Sulfuric acid

Answer 181

Nitric acid

Answer 182

Acetic acid

Answer 183

Phenols are saturated

Answer 184

Alcohols contain carbonyl groups

Answer 185

Phenols have –OH directly bonded to benzene

Answer 186

Alcohols have aromatic rings

Answer 187

Acetic acid

Answer 188

Hydrochloric acid

Answer 189

Sulfuric acid

Answer 190

Nitric acid

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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