Class 12 रसायन विज्ञान Ch-11 एल्कोहल, फिनॉल एवं ईथर MCQs

नीचे दिए गए सभी Questions Bihar Board परीक्षा 2026 के लिए “Very Important Questions” (अत्यंत महत्वपूर्ण प्रश्न) हैं। इन सभी Class 12th के (Chemistry/रसायन विज्ञान) = रसायन विज्ञान भाग-2 (Hindi Medium) Book Chapter-11 एल्कोहल, फिनॉल एवं ईथर का Questions का Solve का  वीडियो Youtube और Website पर Upload किया गया है।

1. Which of the following is most acidic in nature? (BSEB, 2021 A)
(A) $CH_3OH$
(B) $CH_3CH_2OH$
(C) $(CH_3)_2CHOH$
(D) $(CH_3)_3COH$

2. The process of converting Sugar into Ethanol using yeast is called: (BSEB, 2021 A)
(A) Hydrogenation
(B) Fermentation
(C) Oxidation
(D) Hydrolysis

3. Formula of Phenol is: (BSEB, 2016 C)
(A) $C_6H_5OH$
(B) $C_2H_5OH$
(C) $C_3H_7OH$
(D) $C_6H_6$

4. When Phenol reacts with $Zn$ dust, it forms:
(A) Benzene
(B) Toluene
(C) Benzaldehyde
(D) Benzoic Acid

5. Which of the following represents mixed ether?
(A) $R-O-R$
(B) $R-O-R’$
(C) $R’-O-R’$
(D) None of these

6. $1^\circ, 2^\circ,$ and $3^\circ$ alcohols are distinguished by: (BSEB, 2017 A)
(A) Oxidation method
(B) Lucas reagent test
(C) Victor Meyer test
(D) All of these

7. Bakelite is obtained by reaction of Phenol with: (BSEB, 2021 A)
(A) Acetaldehyde
(B) Acetone
(C) Formaldehyde
(D) Chlorobenzene

8. Identification of Phenol: (BSEB, 2022 A)
(A) Benzene ring with $-OH$
(B) Benzene ring
(C) Cyclohexane ring with $-OH$
(D) Benzene ring with two $-OH$

9. Nature of Phenol is:
(A) Basic
(B) Neutral
(C) Acidic
(D) None of these

10. General formula of Alkanol is: (BSEB, 2020)
(A) $C_nH_{2n+1}O$
(B) $C_nH_{2n}O$
(C) $C_nH_{2n-2}O$
(D) $C_nH_{2n+2}O$

11. Functional group of Alcohol is: (BSEB, 2019 A, 2020 A, 2022 A)
(A) $-COOH$
(B) $-CHO$
(C) $>C=O$
(D) $-OH$

12. General group of alcohols is: (BSEB, 2025 A)
(A) $-C-OH$
(B) $>CH-OH$
(C) $-CH_2OH$
(D) All of these

13. Dehydration of which alcohol with conc. $H_2SO_4$ gives 2-butene? (BSEB, 2011 A)
(A) 2-methyl propan-2-ol
(B) 2-methyl-1-propanol
(C) Butan-2-ol
(D) Butan-1-ol

14. Wood spirit is known as:
(A) Methanol
(B) Ethanol
(C) Acetone
(D) Benzene

15. When Ethanol is heated with excess conc. $H_2SO_4$ at $170^\circ C$, it forms: (BSEB, 2019)
(A) Ethane
(B) Ethene
(C) Diethyl ether
(D) Ethyl hydrogen sulfate

16. Which of the following will not give the Iodoform test? (BSEB, 2023 A)
(A) Isopropyl alcohol
(B) Ethanol
(C) Benzyl alcohol
(D) Acetone

17. Catalytic hydrogenation of Ethanal (Acetaldehyde) gives: (BSEB, 2024 A)
(A) Methanol
(B) Ethanol
(C) Propanol
(D) Ethane

18. General formula of Glycerol is: (BSEB, 2019)
(A) $CH_2OH-CHOH-CH_2OH$
(B) $CHO-CHOH-CH_2OH$
(C) $CH_2OH-CO-CH_2OH$
(D) $CH_2OH-CH_2OH$

19. Formation of Diethyl ether from Ethanol is a/an: (BSEB, 2019 A)
(A) Nucleophilic substitution reaction
(B) Electrophilic substitution reaction
(C) Addition reaction
(D) Elimination reaction

20. Product of reaction $C_6H_5N_2^+Cl^-$ with $H_2O/H^+$ is: (BSEB, 2021 A)
(A) Aniline
(B) Phenol
(C) Methyl Alcohol
(D) None of these

21. Lucas reagent is a mixture of: (BSEB, 2022 A)
(A) Conc. $HCl$ and Anhydrous $ZnCl_2$
(B) Conc. $HNO_3$ and Anhydrous $ZnCl_2$
(C) Conc. $HCl$ and Hydrated $ZnCl_2$
(D) Conc. $H_2SO_4$ and Anhydrous $ZnCl_2$

22. Ethyl alcohol reacts with bleaching powder to give: (BSEB, 2018 A)
(A) $CH_3CHO$
(B) $C_2H_5Cl$
(C) $CHCl_3$
(D) $CH_3Cl$

23. Which of the following is ethoxy ethane? (BSEB, 2021 A)
(A) $C_2H_5OCH_3$
(B) $CH_3OCH_3$
(C) $C_2H_5OC_2H_5$
(D) None of these

24. The group present in primary alcohol is: (BSEB, 2021 A)
(A) $-CH_2OH$
(B) $>CHOH$
(C) $>C-OH$
(D) None of these

25. Which of the following is most volatile? (BSEB, 2022 A)
(A) $CH_3CH_2CH_2OH$
(B) $CH_3CH(OH)CH_3$
(C) $CH_3-O-CH_2CH_3$
(D) $CH_3CH_2OH$

26. Reaction of alkyl halide with dry $Ag_2O$ forms: (BSEB, 2024 A)
(A) Ester
(B) Ether
(C) $ZnO$
(D) None of these

27. Percentage of $C_2H_5OH$ in rectified spirit is:
(A) 95.5%
(B) 96%
(C) 98%
(D) 99.5%

28. Which of the following does not contain a phenolic group?
(A) Picric acid
(B) Aspirin
(C) Quinol
(D) Resorcinol

29. Butan-2-ol is a: (BSEB, 2023 A, 2024 A)
(A) Primary alcohol
(B) Secondary alcohol
(C) Tertiary alcohol
(D) Dihydric alcohol

30. Diethyl ether is used as a medicine for: (BSEB, 2025 A)
(A) Pain reliever
(B) Sleep inducer
(C) Antiseptic
(D) Anesthetic

31. The order of reactivity of Alcohols with Sodium metal is:
(A) $1^\circ > 2^\circ > 3^\circ$
(B) $3^\circ > 2^\circ > 1^\circ$
(C) $2^\circ > 3^\circ > 1^\circ$
(D) None of these

32. The group present in secondary alcohol is: (BSEB, 2021 A)
(A) $>C-OH$
(B) $-CH_2OH$
(C) $>CHOH$
(D) All of these

33. When acetylene is passed through dilute $H_2SO_4$ with $HgSO_4$, product is: (BSEB, 2022 A)
(A) Ethyl alcohol
(B) Acetone
(C) Acetaldehyde
(D) Mercury carbide

34. Wood Spirit is:
(A) $CH_3OH$
(B) $C_2H_5OH$
(C) $CHCl_3$
(D) $C_6H_5OH$

35. Phenol is converted to Salicylaldehyde by which reaction? (BSEB, 2021 A)
(A) Etard reaction
(B) Kolbe reaction
(C) Reimer-Tiemann reaction
(D) Cannizzaro reaction

36. Reaction of Phenol with $CHCl_3$ and aqueous $NaOH$ at $70^\circ C$ gives: (BSEB, 2015 A)
(A) Benzaldehyde
(B) Salicylaldehyde
(C) Salicylic acid
(D) Benzoic acid

37. How many isomeric alcohols are possible for $C_4H_{10}O$? (BSEB, 2025 A)
(A) 2
(B) 4
(C) 7
(D) 8

38. General formula of monohydric alcohol is: (BSEB, 2021 A)
(A) $C_nH_{2n+1}OH$
(B) $C_nH_{2n+2}OH$
(C) $C_nH_{2n}OH$
(D) None of these

39. Sodium ethoxide reacts with ethyl iodide to give: (BSEB, 2013 A)
(A) Diethyl ether
(B) Ethyl methyl ether
(C) Ethyl ethanoate
(D) None of these

40. Which of the following is also known as “Grain Alcohol”?
(A) Methanol
(B) Ethanol
(C) Propanol
(D) Phenol

41. Which gives tertiary alcohol with Grignard reagent? (BSEB, 2020 A)
(A) Formaldehyde
(B) Acetaldehyde
(C) Acetone
(D) Ethylene oxide

42. Carbon atom in the functional group of Alcohols is: (BSEB, 2023 A)
(A) $sp^3$ hybridized
(B) $sp^2$ hybridized
(C) $sp$ hybridized
(D) $dsp^2$ hybridized

43. Glycerol is a: (BSEB, 2017)
(A) Monohydric alcohol
(B) Dihydric alcohol
(C) Trihydric alcohol
(D) Primary alcohol

44. IUPAC name of $CH_3OC_2H_5$ is: (BSEB, 2016 C)
(A) Methoxy methane
(B) Ethoxy ethane
(C) Ethoxy methane
(D) None of these

45. Which of the following shows the highest boiling point? (BSEB, 2023 A)
(A) Ethanol
(B) Diethyl ether
(C) Ethane
(D) Chloroethane

46. The final product obtained from the nitration of Phenol is:
(A) Hph
(B) Picric Acid
(C) Nitrobenzene
(D) None of these

47. General formula of homologous series of Alkanol is: (BSEB, 2017)
(A) $C_nH_{2n+2}O$
(B) $C_nH_{2n}O_2$
(C) $C_nH_{2n}O$
(D) $C_nH_{2n+1}O$

48. Methyl alcohol is prepared on a large scale by: (BSEB, 2022 A)
(A) Pyroligneous acid
(B) Fermentation of molasses
(C) Reaction of methyl chloride with dry $Ag_2O$
(D) Reaction of methyl amine with $HNO_2$

49. Acidic $K_2Cr_2O_7$ oxidizes methanol to: (BSEB, 2025 A)
(A) $CH_3COCH_3$
(B) $CH_3CHO$
(C) $HCOOH$
(D) $CH_3COOH$

50. Structural formula of Propan-2-ol is: (BSEB, 2019)
(A) $CH_3-CH(OH)-CH_3$
(B) $CH_3-CH_2-CH_2OH$
(C) $CH_2(OH)-CH(OH)-CH_2OH$
(D) $HOCH_2-CH_2-CH_2OH$

51. Which of the following is formula of methoxy methane? (BSEB, 2020 A)
(A) $CH_3OCH_3$
(B) $CH_3COCH_3$
(C) $C_2H_5OCH_3$
(D) $C_2H_5COCH_3$

52. Ethers are:
(A) Neutral
(B) Basic
(C) Acidic
(D) Amphoteric

53. By which group is a hydrogen of an alkene replaced to form alcohol? (BSEB, 2019 A)
(A) Hydroxyl group
(B) Aldehyde group
(C) Carboxylic group
(D) Chloro group

54. Formula of Methanol is: (BSEB, 2016 C)
(A) $CH_3OH$
(B) $CH_3ONa$
(C) $HCHO$
(D) $CH_4$

55. Which of the following is most acidic? (BSEB, 2022 A)
(A) Phenol
(B) Benzyl alcohol
(C) m-Chlorophenol
(D) Cyclohexanol

56. In the reaction $R-OH + CH_2N_2 \rightarrow$, the leaving group is: (BSEB, 2018)
(A) $CH_3$
(B) $R$
(C) $N_2$
(D) $CH_2$

57. Ethanol is soluble in water because it forms: (BSEB, 2019)
(A) Ionic bond
(B) Covalent bond
(C) Hydrogen bond
(D) All of these

58. Which alcohol is present in beverages? (BSEB, 2016 A)
(A) Methanol
(B) Ethanol
(C) Isopropyl alcohol
(D) Butanol

59. Diethyl ether is isomeric with: (BSEB, 2017 A)
(A) Methyl alcohol
(B) Ethyl alcohol
(C) Acetone
(D) Butanol

60. The compound which reacts fastest with Lucas Reagent is: (BSEB, 2020 A)
(A) 1-Butanol
(B) 2-Butanol
(C) 2-Methyl-2-propanol
(D) 2-Methyl-1-propanol

61. When Ethanol is heated with Conc. $H_2SO_4$ at $413$ K, product is: (BSEB, 2015 A)
(A) Ethene
(B) Diethyl ether
(C) Ethyl hydrogen sulphate
(D) Ethane

62. Which of the following compounds is soluble in water? (BSEB, 2021 A)
(A) $CHCl_3$
(B) $C_2H_5-O-C_2H_5$
(C) $CCl_4$
(D) $CH_3CH_2OH$

63. Which of the following is a tertiary alcohol? (BSEB, 2024 A)
(A) $CH_3CH_2OH$
(B) $(CH_3)_3COH$
(C) $CH_2OH-CH_2OH$
(D) $CH_3-CH(OH)-CH_2CH_3$

64. Catalyst for dehydration of primary alcohol is: (BSEB, 2022 A)
(A) Ketone
(B) Ester
(C) Secondary alcohol
(D) Aldehyde

65. IUPAC name of Glycerol is: (BSEB, 2017 A)
(A) Propane-1,2,3-triol
(B) Propane-1,2-diol
(C) Propane-1-ol
(D) None of these

66. Phenol reacts with neutral $FeCl_3$ solution to give: (BSEB, 2022 A)
(A) Red color
(B) Green color
(C) Violet/Purple color
(D) Blue color

67. Phenol reacts with Bromine water to give white precipitate of: (BSEB, 2019 A)
(A) 2,4-dibromophenol
(B) 2,4,6-tribromophenol
(C) 3,5-dibromophenol
(D) m-bromophenol

68. When ethyl alcohol is heated with conc. $H_2SO_4$ at $140^\circ C$, product is: (BSEB, 2013 A)
(A) Ethene
(B) Diethyl ether
(C) Ethyl hydrogen sulphate
(D) Ethane

69. Which of the following is soluble in water? (BSEB, 2023 A)
(A) $CH_3OH$
(B) $CHCl_3$
(C) $CCl_4$
(D) $CS_2$

70. The functional group of Ether is: (BSEB, 2020 A, 2023 A)
(A) $-O-$
(B) $-CHO$
(C) $-COOH$
(D) $-OH$

71. When alkyl halide is heated with dry $Ag_2O$, it forms:
(A) Ester
(B) Ether
(C) Ketone
(D) Alcohol

72. IUPAC name of $(CH_3)_2CH-CH_2-CH_2OH$ is: (BSEB, 2024 A)
(A) 2-methyl-1-propanol
(B) Isobutyl alcohol
(C) 2-methyl-1-butanol
(D) None of these

Bihar Board Class 12th के (Chemistry/रसायन विज्ञान) = रसायन विज्ञान भाग-2 (Hindi Medium) Book Chapter-11 एल्कोहल, फिनॉल एवं ईथर के Exam 2026 MCQs Questions Answer Key