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Alcohols, Phenols and Ethers

Board » Bihar Board » Class 12th » English Medium » Science » Chemistry » Part-2 » Unit 11: Alcohols, Phenols and Ethers

Objective Questions (MCQs)

Question
Multiple Choice
ID- 14598
BSEB, 2011

1. Which of the following alcohols gives 2-butene on dehydration by conc $\ce{H2SO4}$?

  • (A) 2-Methyl propene-2-ol
  • (B) 2-Methyl 1-propanol
  • (C) Butan-2-ol
  • (D) Butan 1-ol
Multiple Choice
ID- 14599

2. Which of the following reagents can not be used to oxidise primary alcohols to aldehydes?

  • (A) $\ce{CrO3}$ in anhydrous medium
  • (B) $\ce{KMnO4}$ in acidic medium
  • (C) Pyridinium chlorochromate
  • (D) Heat in the presence of Cu at 573 K
Multiple Choice
ID- 14600

3. 1-Phenylethanol can be prepared by the reaction of benzaldehyde with:

  • (A) methyl bromide
  • (B) ethyl iodide and magnesium
  • (C) methyl iodine and magnesium (Grignard reagent's)
  • (D) methyl bromide and aluminium bromide
Multiple Choice
ID- 14601

4. Which of the following alcohols will give the most stable carbocation during dehydration?

  • (A) 2-Methyl-1-propanol
  • (B) 2-Methyl-2-propanol
  • (C) 1-Butanol
  • (D) 2-Butanol
Multiple Choice
ID- 14602

5. Order of esterification of alcohols is:

  • (A) 3° > 1° > 2°
  • (B) 2° > 3° > 1°
  • (C) 1° > 2° > 3°
  • (D) None of these
Multiple Choice
ID- 14603

6. What happens when tertiary butyl alcohol is passed over heated copper at 300°C?

  • (A) Secondary butyl alcohol is formed
  • (B) 2-Methylpropene is formed
  • (C) 1-Butene is formed
  • (D) Butanal is formed
Multiple Choice
ID- 14604

7. What would be the reactant and regant used to obtain 2, 4-dimenthylpentan-3-ol?

  • (A) Propanal and propyl magnesium bromide
  • (B) 3-Methylbutanal and 2-methyl magnesium iodide
  • (C) 2, 2=Dimethylpropanone and methyl magnesium iodide
  • (D) 2-Methylpropanal and isopropyl magnesium iodide
Multiple Choice
ID- 14605

8. The decreasing order of boiling point of the following alcohols is:

  • (A) 3-methylbutan-2-ol > 2-methylbutan-2-ol > pentan-1-ol
  • (B) pentan-1-ol > 3-methylbutan-2-ol > 2-methylbutan-2-ol
  • (C) 2-methylbutan-2-ol > 3-methylbutan-2-ol > pentan-1-ol
  • (D) 2-methylbutan-2-ol > pentan-1-ol > 3-methylbutan-2-ol
Multiple Choice
ID- 14606
BSEB, 2021 (A)

9. Which one of the following compounds is soluble in water:

  • (A) $\ce{CHCl3}$
  • (B) $\ce{C2H5 – O – C2H5}$
  • (C) $\ce{CCl4}$
  • (D) $\ce{CH3CH2OH}$
Multiple Choice
ID- 14607
BSEB, 2021 (A)

10. The product of the reaction $\ce{C6H5N = N^+\overset{-}{C}l \->[H^3O^+]}$ is:

  • (A) Aniline
  • (B) Phenol
  • (C) Methyl alcohol
  • (D) None of these
Multiple Choice
ID- 14608

11. An alcohol $\ce{X}$ when treated with hot conc. $\ce{H2SO4}$ gave an alkene $\ce{Y}$ with formula $\ce{C4H8}$. This alkene on ozonolysis gives single product with molecular formula $\ce{C2H4O}$. The alcohol is:

  • (A) butan-1-ol
  • (B) butan-2-ol
  • (C) 2-methylpropan-1-ol
  • (D) 2, 2-dimethylbuytan-1-ol
Multiple Choice
ID- 14609

12. Propanone on reaction with alkyl magnesium bromide followed by hydrolysis will produce:

  • (A) primary alcohol
  • (B) secondary alcohol
  • (C) tertiary alcohol
  • (D) carboxylic acid
Multiple Choice
ID- 14610

13. Vapours of an alcohol $\ce{X}$ when passed over hot reduced copper, produce an alkene, the alcohol is:

  • (A) primary alcohol
  • (B) secondary alcohol
  • (C) tertiary alcohol
  • (D) dihydric alcohol
Multiple Choice
ID- 14611

14. Phenol when treated with excess of bromine water gives a white precipitate of:

  • (A) 2, 4, 6-tribromophenol
  • (B) $\ce{o}$-bromophenol
  • (C) $\ce{p}$-bromophenol
  • (D) bromobenzene
Multiple Choice
ID- 14612

15. Picric acid is a yellow coloured vompounds. Its chemical name is:

  • (A) $\ce{m}$-nitrobenzoic acid
  • (B) 2, 4, 6-trinitrophenol
  • (C) 2, 4, 6-tribromophenol
  • (D) $\ce{p}$-nitrophenol
Multiple Choice
ID- 14613
BSEB, 2021 (A)

16. The general formula of monohydric alcohol is:

  • (A) $\ce{C_nH_2_n_+_1OH}$
  • (B) $\ce{C_nH_2_n_+_2OH}$
  • (C) $\ce{C_nH_2_nOH}$
  • (D) None of these
Multiple Choice
ID- 14614
BSEB, 2021 (A)

17. Which is ethoxy ethane?

  • (A) $\ce{C2H5OCH3}$
  • (B) $\ce{CH3OCH3}$
  • (C) $\ce{C2H5OC2H5}$
  • (D) None of these
Multiple Choice
ID- 14615

18. Arrange the following alcohols in order of increasing reactivity towards sodium metal. (i) $\ce{(CH3)3C—OH}$ (ii) $\ce{CH3)2CH—OH}$ (iii) $\ce{CH3CH2OH}$

  • (A) (iii) < (ii) < (i)
  • (B) (ii) < (i) < (iii)
  • (C) (i) < (ii) < (iii)
  • (D) (iii) < (i) < (ii)
Multiple Choice
ID- 14616

19. The reaction between phenol and chloroform in the presence of aqueous NaOH is

  • (A) nucleophilic substitution reaction
  • (B) electrophilic addition reaction
  • (C) electrophilic substitution reaction
  • (D) nucleophilic addition reaction
Multiple Choice
ID- 14617

20. The most suitable reagent for the conversion of $\ce{RCH2OH->RCHO}$ is:

  • (A) $\ce{K2Cr2O7}$
  • (B) $\ce{CrO3}$
  • (C) $\ce{KMnO4}$
  • (D) $\ce{PCC}$
Multiple Choice
ID- 14618

21. The major product of acid catalysed dehydration of 2-methylcyclohexanol and butan-1-ol are respectively

  • (A) 1-methylcyclohexene and but-1-ene
  • (B) 2-methylcyclohexene and but-2-ene
  • (C) 2-methylcyclohexene and butane
  • (D) 1-methylcyclohexene and but-2-ene
Multiple Choice
ID- 14619

22. Tertiary butyl alcohol gives tertiary butyl chlorideon treatment with

  • (A) conc. $\ce{HCl}$/anhydrous $\ce{ZnCl3}$
  • (B) $\ce{KCN}$
  • (C) $\ce{NaOCl}$
  • (D) $\ce{Cl2}$
Multiple Choice
ID- 14620
BSEB, 2021 (A)

23. By which of the following reaction Phenol is converted into salicyl aldehyde?

  • (A) Etard reaction
  • (B) Kolbe's reaction
  • (C) Reimer-Tiemann reaction
  • (D) Cannizzaro's reaction
Multiple Choice
ID- 14621
BSEB, 2019 (A)

24. Alcohol is formed when one of the hydrogen of Alkane is replaced by:

  • (A) Hydroxyl group
  • (B) Aldehyde group
  • (C) Carboxylic group
  • (D) Chloro group
Multiple Choice
ID- 14622

25. Which of the following is phenol?

  • (A) Cresol
  • (B) Catechol
  • (C) Benzenol
  • (D) All of these
Multiple Choice
ID- 14623

26. Benzoquinone is prepared by reaction of phenol with

  • (A) $\ce{Na2Cr2O7,H2SO4}$
  • (B) $\ce{KMnO4,H2SO4}$
  • (C) $\ce{Na2CrO4,HCl}$
  • (D) $\ce{K2MnO4,H2SO4}$
Multiple Choice
ID- 14624

27. The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is

  • (A) benzoic acid
  • (B) salicyaldehyde
  • (C) salicylic acid
  • (D) phthalic acid
Multiple Choice
ID- 14625

28. Which of the following compounds does not react with $\ce{NaOH}$?

  • (A) $\ce{CH3COOH}$
  • (B) $\ce{CH3CONH2}$
  • (C) $\ce{C6H5OH}$
  • (D) $\ce{CH3CH2OH}$
Multiple Choice
ID- 14626

29. Conversion of ethyl alcohol into acetaldehyde is an example of:

  • (A) hydrolysis
  • (B) oxidation
  • (C) reduction
  • (D) molecular rearrangement
Multiple Choice
ID- 14627

30. Which of the following is the proper method to prepare $\ce{n}$-hexane from $\ce{n}$-propyl alcohol? $\ce{CH3CH2CH2OH->[(X)]}$$\ce{CH3CH2CH2Br->[(Y)]}$$\ce{CH3(CH2)4CH3}$

  • (A) $\ce{(X)->HBr, (Y)->HCN}$
  • (B) $\ce{(X)->HBr, (Y)->Na, ether}$
  • (C) $\ce{(X)->Br2, (Y)->CH3CN}$
  • (D) $\ce{(X)->Br2, (Y)->KMnO4}$
Multiple Choice
ID- 14628

31. Cumene on reaction with oxygen followed by hydrolysis gives:

  • (A) $\ce{CH3OH}$ and $\ce{C6H5COCH3}$
  • (B) $\ce{C6H5OH}$ and $\ce{(CH3)2O}$
  • (C) $\ce{C6H5OCH3}$ and $\ce{CH3OH}$
  • (D) $\ce{C6H5OH}$ and $\ce{CH3COCH3}$
Multiple Choice
ID- 14629

32. An alcohol $\ce{X}$ on heating with concentreated $\ce{H2SO4}$ gives an alkene $\ce{Y}$ which can show geometrical isomerism. The alcohol $\ce{X}$ is:

  • (A) $\ce{CH3CH2CH(OH)CH3}$
  • (B) $\ce{(CH3)2C(OH)CH(CH3)2}$
  • (C) $\ce{(CH3)3C (OH)}$
  • (D) $\ce{(CH3)2C (OH)CH2CH3}$
Multiple Choice
ID- 14630

33. The enzyme which can catalyse the conversion of glucose to ethanol is:

  • (A) invertase
  • (B) zymase
  • (C) maltase
  • (D) diatase
Multiple Choice
ID- 14631

34. Methyl alcohol is industrially prepared by the action of:

  • (A) $\ce{CH3COCH3}$
  • (B) $\ce{CO + H2}$
  • (C) $\ce{CH3COOH}$
  • (D) $\ce{C2H5OH}$
Multiple Choice
ID- 14632
BSEB, 2021 (A)

35. Bakelite is obtained from phenol by reacting it with:

  • (A) Acetaldehyde
  • (B) Acetal
  • (C) Formaldehyde
  • (D) Chlorobenzene
Multiple Choice
ID- 14633

36. The ether that undergoes electrophilic substitution reaction is:

  • (A) $\ce{CH3OC2H5}$
  • (B) $\ce{C6H5OCH3}$
  • (C) $\ce{CH3OCH3}$
  • (D) $\ce{C2H5OC2H5}$
Multiple Choice
ID- 14634

37. An equimolar quantities of ethanol and propanol is heated with conc. $\ce{H2SO4}$. The product formed is/are:

  • (A) $\ce{C2H5OC2H5}$
  • (B) $\ce{C3H7OC3H7}$
  • (C) $\ce{C2H5OC3H7}$
  • (D) All of these
Multiple Choice
ID- 14635

38. Monochlorination of toluene in sunlight followed by hydrolysis with aq. $\ce{NaOH}$ yields:

  • (A) o-cresol
  • (B) m-cresol
  • (C) 2, 4-dihydroxytoluene
  • (D) benzyl alcohol
Multiple Choice
ID- 14636

39. How many alcohols with molecular formula $\ce{C4H10O}$ are chiral in nature?

  • (A) 1
  • (B) 2
  • (C) 3
  • (D) 4
Multiple Choice
ID- 14637

40. What is the correct order of reactivity of alcohols in the following reaction? $\ce{R—OH + HCl ->[ZnCl2] R—Cl + H2O}$

  • (A) 1° > 2° > 3°
  • (B) 1° > 3° > 2°
  • (C) 3° > 2° > 1°
  • (D) 3° > 1° > 2°
Multiple Choice
ID- 14638

41. $\ce{CH3CH2OH}$ can be converted into $\ce{CH3CHO}$ by

  • (A) catalytic hydrogenation
  • (B) treatment with $\ce{LiAlH4}$
  • (C) treatment with pyridinium chlorochromate
  • (D) treatment with $\ce{KMnO4}$
Multiple Choice
ID- 14639

42. The process of converting alkyl halides into alcohols involves

  • (A) addition reaction
  • (B) substitution reaction
  • (C) dehydrohalogenation reaction
  • (D) rearrangement reaction
Multiple Choice
ID- 14640

43. IUPAC name of $\ce{m}$-cresol is:

  • (A) 3-methylphenol
  • (B) 3-chlorophenol
  • (C) 3-methoxphenol
  • (D) benzene-1, 3-diol
Multiple Choice
ID- 14641

44. Which of the following compounds will react with sodium hydroxide solution in water?

  • (A) $\ce{C6H5OH}$
  • (B) $\ce{C6H5CH2OH}$
  • (C) $\ce{(CH3)3COH}$
  • (D) $\ce{C2H5OH}$
Multiple Choice
ID- 14642

45. Phenol is less acidic than:

  • (A) ethanol
  • (B) o-nitrophenol
  • (C) o-methylphenol
  • (D) o-methoxyphenol
Multiple Choice
ID- 14643

46. Which of the following is most acidic?

  • (A) Benzyl alcohol
  • (B) Cyclohexanol
  • (C) Phenol
  • (D) m-Chlorophenol
Multiple Choice
ID- 14644
BSEB, 2016 (C)

47. The formula of Phenol is:

  • (A) $\ce{C6H5OH}$
  • (B) $\ce{C2H5OH}$
  • (C) $\ce{C3H4OH}$
  • (D) $\ce{C6H6}$
Multiple Choice
ID- 14645
BSEB, 2016 (C)

48. The I.U.P.A.C. name of $\ce{CH3OC2H5}$ is

  • (A) Methoxy methane
  • (B) Ethoxy ethane
  • (C) Ethoxy methane
  • (D) None
Multiple Choice
ID- 14646
BSEB, 2016 (C)

49. The formula of methanol is:

  • (A) $\ce{CH3OH}$
  • (B) $\ce{CH3ONa}$
  • (C) $\ce{HCHO}$
  • (D) $\ce{CH4}$
Multiple Choice
ID- 14647
BSEB, 2018 (A)

50. The product obtained when silica reacts with hydeogen fluoride is:

  • (A) $\ce{SiF4}$
  • (B) $\ce{H2SiF6}$
  • (C) $\ce{H2SiF4}$
  • (D) $\ce{H2SiF3}$
Multiple Choice
ID- 14648
BSEB, 2018 (A)

51. $\ce{R—OH + CH2N2}$ -> Leaving group in this reaction is

  • (A) $\ce{CH3}$
  • (B) $\ce{R}$
  • (C) $\ce{N2}$
  • (D) $\ce{CH2}$
Multiple Choice
ID- 14649
BSEB, 2020 (A)

52. Which of the following is a formula of methoxy methane?

  • (A) $\ce{CH3OCH3}$
  • (B) $\ce{CH3COCH3}$
  • (C) $\ce{C2H5OCH3}$
  • (D) $\ce{C2H5COCH3}$
Multiple Choice
ID- 14650
BSEB, 2017 (A)

53. Primary, Secondary and Tertiary alcohols are distinguished by:

  • (A) Oxidation Method
  • (B) Lucas reagent Method
  • (C) Victor Meyer's Method
  • (D) All of these
Multiple Choice
ID- 14651
BSEB, 2019 (C)

54. Ethanol when heated with excess of conc. $\ce{H2SO4}$ at 170°C gives:

  • (A) Ethane
  • (B) Ethene
  • (C) Dimethyl ether
  • (D) Ethyl hydrogen Sulphate
Multiple Choice
ID- 14652
BSEB, 2019 (C)

55. Ethanol is soluble in water because is forms:

  • (A) Ionic bond with water
  • (B) Covalent bond with water
  • (C) Hydrogen bond with water
  • (D) All of these