This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Chemistry Part Ii > Class 12 Chemistry (Part Ii) Chapter 11 Alcohols – Quiz 3 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 11 Alcohols Quiz 3 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Among the following compounds, which ones can be dehydrated the fastest? A) Pentan-1-ol. B) Pentan-2-ol. C) 3-Methyl-1-pentanol. D) 3-Methyl-3-pentanol. Show Answer Correct Answer: D) 3-Methyl-3-pentanol. 2. Aryl halide is less reactive than alkyl halide towards nucleophilic substitution because:(1) Less stable carbonium ion (2) Due to large C-Cl bond energy (3) Inductive effect (4) Resonance stabilisation and sp2-hybridisation of C attached to halide A) 3. B) 4. C) 1. D) 2. Show Answer Correct Answer: B) 4. 3. Alcohols act as both-Bronsted acids and bases. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 4. Dehydration of alcohols to give ethers is catalysed by A) Conc. H$_{2}$SO$_{4}$ at 413K. B) Conc. H$_{2}$SO$_{4 }$at 443K. C) Conc. H$_{2}$SO$_{4 }$at 383K. D) None of these. Show Answer Correct Answer: A) Conc. H$_{2}$SO$_{4}$ at 413K. 5. The enzyme required for fermentation A) Ehanamase. B) Invertase. C) Fermase. D) Zymase. Show Answer Correct Answer: D) Zymase. 6. 2-methy-2-butanol is a: A) Primary alcohol. B) Secondary alcohol. C) Tertiary alcohol. D) None of the above. Show Answer Correct Answer: C) Tertiary alcohol. 7. Which one of the following compounds is produced by the primary oxidation of butane-2-ol? A) Ethyl methyl ketone. B) Butanoic acid. C) Diethyl ketone. D) Dimethyl ketone. E) 2-butanol. Show Answer Correct Answer: A) Ethyl methyl ketone. 8. How can be phenol prepared from benzene diazonium chlride A) Reaction with water. B) Reaction with acid. C) Reaction with cuprous chloride. D) Reaction with alcohol. Show Answer Correct Answer: A) Reaction with water. 9. A clear, colorless liquid produces bubbles upon the addition of Mg and potassium carbonate, respectively, but no observable reaction occurs upon the addition of sodium hydroxide. What is the likely identity of the solution? A) 1-propanol. B) Propyl ethanoate. C) Propanoic acid. D) Propanone. Show Answer Correct Answer: C) Propanoic acid. 10. The products obtained by reaction of Anisole with HI are ..... A) Methanol and Iodobenzene. B) Phenol and Iodomethane. C) Phenol and Methanol. D) Ethanol and Iodobenzene. Show Answer Correct Answer: B) Phenol and Iodomethane. 11. A reacts with grignard reagent R-Mg-X followed by hydrolysis to give butan-2-ol. which statement is not correct about this reaction A) A cant be formaldehyde. B) A may be ethanal. C) R may be methyl. D) A may be propanone. Show Answer Correct Answer: D) A may be propanone. 12. Assertion:Vitamin D cannot be stored in our bodyReason:Vitamin D is fat soluble vitamin and is excretedfrom the body in urine. A) Assertion is correct, reason is incorrect. B) Assertion is correct, reason is correct; reason is a correctexplanation for assertion. C) Assertion is incorrect, reason is correct. D) Assertion is correct, reason is correct; reason is not acorrect explanation for assertion. Show Answer Correct Answer: C) Assertion is incorrect, reason is correct. 13. The major product formed in the following reaction ..... CH3CH (Cl)CH2-CH2OH+ aq.KOH is: A) A. B) B. C) C. D) D. Show Answer Correct Answer: D) D. 14. Which of the following reagents is used to test for the presence of a hydroxy group (an OH) via a nucleophilic substitution reaction? A) PBr$_{3}$. B) NaCl & sulfuric acid. C) PCl$_{5}$. D) SOCl$_{2}$. Show Answer Correct Answer: C) PCl$_{5}$. 15. Phenol reacts with bromine in CS$_{2}$ to give A) O-bromophenol. B) M-bromophenol. C) O-and p-bromophenol. D) 2, 4, 6-tribromophenol. Show Answer Correct Answer: C) O-and p-bromophenol. 16. Ether is formed during dehydration of alcohol A) True. B) Neither. C) Uncertain. D) False. Show Answer Correct Answer: A) True. 17. This alcohol is also known as grain alcohol A) Isopropyl alcohol. B) Glycerol. C) Ehanol. D) Methanol. Show Answer Correct Answer: C) Ehanol. 18. Phenol is stronger acid than water and itself it is A) Weakly acidic. B) Strong acid. C) Alkali. D) Weakly basic. Show Answer Correct Answer: A) Weakly acidic. 19. The chemical properties of phenols are significantly the same from those of alcohol. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 20. Alkenes convert into alcohols by(a) hydrolysis by dil. H2SO4(b) hydration of alkene by alkaline KMnO4(c) hydrolysis by water vapours and conc. HNO3(d) hydration of alkene by aqueous KOH A) Hydrolysis by dil. H2SO4. B) Hydration of alkene by alkaline KMnO4. C) Hydrolysis by water vapours and conc. HNO3. D) Hydration of alkene by aqueous KOH. Show Answer Correct Answer: B) Hydration of alkene by alkaline KMnO4. 21. Which type of alcohol oxidises fastest? A) Primary. B) Diol. C) Tertiary. D) Secondary. Show Answer Correct Answer: A) Primary. 22. What adds two alcohols in the anti position? A) O3 + DMO. B) KMnO4, NaOH, cold. C) Acid cleaved epoxide. D) OsO4, NMO. Show Answer Correct Answer: C) Acid cleaved epoxide. 23. Assertion:Chlorophenols are weaker acids than phenolReason:The-I effect exerted by chlorine is greater than +R effect exerted by it A) If both Assertion and Reason are correct and Reason is the correct explanation of the Assertion. B) If both Assertion and Reason are correct but Reason is not the correct explanation of the Assertion. C) If Assertion is correct but Reason is incorrect. D) If Assertion is incorrect but Reason is correct. Show Answer Correct Answer: D) If Assertion is incorrect but Reason is correct. 24. Which of the following describes fermentation? A) It involves conversion of hydrocarbons to ethanol, accompanied by the evolution of carbon dioxide. B) It involves conversion of carbohydrates to ethanol, accompanied by the evolution of carbon dioxide. C) It involves conversion of hydrocarbons to ethanol, accompanied by the evolution of carbon monoxide. D) It involves conversion of carbohydrates to ethanol, accompanied by the evolution of carbon monoxide. Show Answer Correct Answer: B) It involves conversion of carbohydrates to ethanol, accompanied by the evolution of carbon dioxide. 25. What reagent adds a halogen (X) in the Markovnikov position? A) HX + ROOR. B) X2. C) X2 + H2O. D) HX. Show Answer Correct Answer: D) HX. 26. For BONUS Question:what alcohol is the active constituent of intoxicating beverages A) Spirits. B) Grain alcohol. C) Wood alcohol. D) Ethylene glycol. Show Answer Correct Answer: B) Grain alcohol. 27. Products in the reaction C$_{6}$H$_{5}$OCH$_{3}$ + HI $\rightarrow$ A) C$_{6}$H$_{5}$I and HOCH$_{3}$. B) C$_{6}$H$_{5}$OH and CH$_{3}$I. C) C$_{6}$H$_{5}$CH$_{2}$OH and CH$_{3}$I. D) CH$_{3}$CH$_{2}$I and C$_{6}$H$_{5}$OH$_{ }$. Show Answer Correct Answer: B) C$_{6}$H$_{5}$OH and CH$_{3}$I. 28. Hydroboration-oxidation reaction gives A) Primary alcohol. B) Secondary alcohol. C) Tert-alcohol. D) All the three. Show Answer Correct Answer: A) Primary alcohol. 29. What is the chemical test to distinguish class of alcohols (primary, secondary and tertiary alcohol) A) Lucas Test. B) Baeyer's Test. C) Iodoform Test. D) Tollens' Test. Show Answer Correct Answer: A) Lucas Test. 30. Dehydration of an alcohol produces what type of compound? A) A ketone. B) An alkene. C) An alkane. D) An aldehyde. Show Answer Correct Answer: B) An alkene. 31. 1-methylpropanol can be identified by which of the following test A) Lucas test and give immediate turbidity. B) Lucas test and give turbidity after 10 to 15 mins. C) Iodoform test and give yellow ppt. D) Both a and c. E) Both b and c. Show Answer Correct Answer: E) Both b and c. 32. Ethers are used on a large scale as: A) Solvents. B) Humectants. C) Germicides. D) Anesthetics. Show Answer Correct Answer: A) Solvents. 33. What colour would you see in a distinguishing test between phenols and alcohols? (Using iron (III) chloride). A) Purple precipitate. B) Purple solid. C) Purple gas. D) Purple solution. Show Answer Correct Answer: D) Purple solution. 34. (9.16) What is the first step in opening of epoxide ring? (using strong nucleophile and acid) A) Nucleophilic attack on carbon. B) Bond cleavage. C) Protonation of O. D) None of the above. Show Answer Correct Answer: A) Nucleophilic attack on carbon. 35. Describe two physical properties of phenols. A) Lower boiling points than aliphatic alcohols. B) Insoluble in water. C) Highly volatile at room temperature. D) 1. Soluble in water; 2. Higher boiling points than aliphatic alcohols. Show Answer Correct Answer: D) 1. Soluble in water; 2. Higher boiling points than aliphatic alcohols. 36. Which of the following compounds is to be reacted with Methanal followed by hydrolysis to give Phenymethanol. A) Bromobenzene. B) Phenol. C) Methyl magnesium bromide. D) Phenyl magnesium bromide. Show Answer Correct Answer: D) Phenyl magnesium bromide. 37. "sqeaky pop" is the observation confirming which gas? A) H$_{2}$. B) H$_{2}$O. C) CO$_{2}$. D) O$_{2}$. Show Answer Correct Answer: A) H$_{2}$. 38. What is the primary method for synthesizing phenols from benzene? A) Alkylation of benzene. B) Reduction of phenol. C) Nitration of benzene. D) Hydroxylation of benzene. Show Answer Correct Answer: D) Hydroxylation of benzene. 39. Aspirin is also known as- A) Acetoxysalicylic acid. B) 2-Acetoxybenzoic acid. C) BOTH. D) None of the above. Show Answer Correct Answer: B) 2-Acetoxybenzoic acid. 40. Which of the following alcohols will give the most stable carbocation during dehydration? A) 1-Butanol. B) 2-methyl-1-propanol. C) 2-Butanol. D) 2-methyl-2-propanol. Show Answer Correct Answer: D) 2-methyl-2-propanol. 41. Arrange the following compounds in increasing order of boiling point. Propan-1-ol, butan-1-ol, butan-2-ol, pentan-1-ol A) Propan-1-ol, butan-1-ol, butan-2-ol, pentan-1-ol. B) Propan-1-ol, butan-2-ol, butan-1-ol, pentan-1-ol. C) Pentan-1-ol, butan-2-ol, butan-1-ol, propan-1-ol. D) Pentan-1-ol, butan-1-ol, butan-2-ol, propan-1-ol. Show Answer Correct Answer: A) Propan-1-ol, butan-1-ol, butan-2-ol, pentan-1-ol. 42. Which of the following molecules can be reduced using LiAlH$_{4}$? A) Primary & secondary alcohols ONLY. B) Carboxylic acids & ketones. C) Carboxylic acids, ketones & aldehydes. D) Ketones and primary alcohols ONLY. Show Answer Correct Answer: C) Carboxylic acids, ketones & aldehydes. 43. Assertion (A):Ethanol is a weaker acid than phenol.Reason (R):Sodium ethoxide may be prepared by the reaction of ethanol with aqueous NaOH. A) Both Assertion (A) and Reason (R) are true and Reason (R) is the correct explanation of the Assertion (A). B) Both Assertion (A) and Reason (R) are true but Reason is not the correct explanation of the Assertion. C) Assertion (A) is true, but Reason (R) is false. D) Assertion (A) is false, but Reason (R) is true. Show Answer Correct Answer: C) Assertion (A) is true, but Reason (R) is false. 44. Which of the following reacts with NaOH to give an alcohol? A) Methanal. B) Propene. C) Butene. D) Ethanal. Show Answer Correct Answer: A) Methanal. 45. What is the classification of the alcohol formed if 2-bromo-2-methylbutane undergoes nucleophilic substitution with KOH? A) Tertiary alcohol. B) Quaternary alcohol. C) Secondary alcohol. D) Primary alcohol. Show Answer Correct Answer: A) Tertiary alcohol. 46. Phenolphthalein is a special test for phenols. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: A) True. 47. The mechanism of dehydration of alcohols to alkenes involves- A) Elimination reaction. B) Substitution reaction. C) Rearrangement. D) None of the above. Show Answer Correct Answer: A) Elimination reaction. 48. Ether molecules are polar, but do not form hydrogen bonds with other ether molecules because ..... A) Ether molecules are so reactive that they never have an opportunity to form hydrogen bonds. B) There are too many hydrogen atoms on the molecules to bond with just one oxygen atom. C) There is no hydrogen atom bonded to the oxygen. D) The molecules are generally too large. E) Only binary compounds form hydrogen bonds. Show Answer Correct Answer: C) There is no hydrogen atom bonded to the oxygen. 49. The general formula for alcohols is ROH.Where the R, represents an alkyl group attached to the hydroxyl group. A) 1st statement is correct. B) 2nd statement is correct. C) Both are correct. D) Neither. Show Answer Correct Answer: C) Both are correct. 50. Reagent that can be used to convert haloalkane into alcohol is A) Aqueous potassium hydroxide. B) Potassium hydroxide in ether. C) Alcoholic potassium hydroxide. D) Ammonical potassium hydroxide. Show Answer Correct Answer: A) Aqueous potassium hydroxide. 51. What is carbolic acid? A) Benzoic acid. B) Alcohol. C) Carboxylic acid. D) Phenol. Show Answer Correct Answer: D) Phenol. 52. The reaction of alcohols with benzoyl chloride and its derivatives in presence of aqueous NaOH is called: A) Schotten Baumann Reaction. B) Fischer Speier Esterification. C) Meerwein Pondorff Verley Reduction. D) None of the above. Show Answer Correct Answer: A) Schotten Baumann Reaction. 53. Which of the following amines is used in the manufacture of Nylon 66? A) Dihexylamine. B) 1-Hexylamine. C) Cyclohexylamine. D) 1, 6-Hexanediamine. Show Answer Correct Answer: D) 1, 6-Hexanediamine. 54. Alkyl halide formation from tertiary alcohols follow ..... mechanism A) E2. B) SN2. C) SN1. D) E1. Show Answer Correct Answer: C) SN1. 55. (9.3) What is labelled 1 in an oxirane derivative A) Whatever has a substituent. B) The carbon to the right of the oxygen. C) The oxygen. D) The carbon to the left of the oxygen. Show Answer Correct Answer: C) The oxygen. 56. The electrophile used in Reimer-Tiemann reaction is A) NaOH. B) :CCl2. C) H2O. D) CCl4. Show Answer Correct Answer: B) :CCl2. 57. Acidic nature of phenol is best increased by which group on ortho position A) Methoxy. B) Chloro. C) Nitro. D) Methyl. Show Answer Correct Answer: C) Nitro. 58. The following statements are true about phenol EXCEPT A) It forms salt when reacted with sodium. B) It forms brown solution with iron(III) chloride solution. C) It gives white precipitate with bromine water. D) It is a stronger acid compared to ethanol but weaker than ethanoic acid. Show Answer Correct Answer: B) It forms brown solution with iron(III) chloride solution. 59. What carbonyl reaction forms a hydrate? A) Carbonyl + Acid. B) Carbonyl + KCN, H+. C) Carbonyl + alcohol. D) Carbonyl + H2O. Show Answer Correct Answer: D) Carbonyl + H2O. 60. The abbreviation IUPAC means A) International Union Pharmacy Association in chemistry. B) Institution Union of Pure and application in chemistry. C) International Union of Pure and applied chemistry. D) Institution union of Pure and applied Chemistry. Show Answer Correct Answer: C) International Union of Pure and applied chemistry. ← PreviousNext →Related QuizzesScience QuizzesClass 12 QuizzesClass 12 Chemistry (Part Ii) Chapter 11 Alcohols Quiz 1Class 12 Chemistry (Part Ii) Chapter 11 Alcohols Quiz 2Class 12 Chemistry (Part Ii) Chapter 11 Alcohols Quiz 4Class 12 Chemistry (Part Ii) Chapter 11 Alcohols Quiz 5Class 12 Chemistry (Part Ii) Chapter 11 Alcohols Quiz 6Class 12 Chemistry (Part Ii) Chapter 11 Alcohols Quiz 7Class 12 Chemistry (Part Ii) Chapter 11 Alcohols Quiz 8Class 12 Chemistry (Part Ii) Chapter 11 Alcohols Quiz 9 🏠 Back to Homepage 📘 Download PDF Books 📕 Premium PDF Books