This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Chemistry Part Ii > Class 12 Chemistry (Part Ii) Chapter 11 Alcohols – Quiz 1 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 11 Alcohols Quiz 1 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. It is substance that kills microorganisms on inanimate objects. A) Disinfectant. B) Antiseptic. C) All the above. D) None of the above. Show Answer Correct Answer: A) Disinfectant. 2. What reagent adds two halogens (X) in Syn positions? A) X2. B) X2 + H2O. C) HX + ROOR. D) HX. Show Answer Correct Answer: A) X2. 3. What is the product in oxidation of secondary alcohols? A) A carboxylic acid. B) An aldehyde. C) A ketone. D) Ainsley harriet's moist lasagne. Show Answer Correct Answer: C) A ketone. 4. When phenol is treated with CHCl$_{3}$ and NaOH the product formed is A) Benzaldehyde. B) Salicylaldehyde. C) Salicylic acid. D) Benzoic acid. Show Answer Correct Answer: B) Salicylaldehyde. 5. Sodiumboro Hydride is used to reduce the ester group. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 6. The names of chemicals that contain a ketone functional group will end with ..... A) -one. B) -oic acid. C) -al. D) -ol. Show Answer Correct Answer: A) -one. 7. The boiling point of alcohols increases as the molecules become smaller. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 8. What reagent adds an alcohol in the Anti Markovnikov, Syn position? A) BH3, THF + H2O2, NaOH. B) Hg(OAc)2, EtNH2 + NaBH4. C) O2O4 + NMO. D) KMnO4, NaOH + cold. Show Answer Correct Answer: A) BH3, THF + H2O2, NaOH. 9. What is the reagent/condition can be used to produce alcohols from alkenes? A) Conc H$_{2}$SO$_{4}$ and heated. B) Na. C) H$_{2}$/ Pt. D) H$_{2}$O / H$^{+}$. Show Answer Correct Answer: D) H$_{2}$O / H$^{+}$. 10. General formula for alcohol is ..... A) C$_{n}$H$_{2n+1}$O. B) C$_{n}$H$_{2n}$OH. C) C$_{n}$H$_{2n+1}$COOH. D) C$_{n}$H$_{2n+1}$OH. Show Answer Correct Answer: D) C$_{n}$H$_{2n+1}$OH. 11. The principal ingredient in alcoholic beverages is: A) Isopropyl alcohol. B) Denatured alcohol. C) Ethanol. D) Methanol. Show Answer Correct Answer: C) Ethanol. 12. Phenol is less acidic than ..... A) O-methylphenol. B) O-methoxyphenol. C) O-nitrophenol. D) Ethanol. Show Answer Correct Answer: C) O-nitrophenol. 13. When treated with sulfuric acid @ 170 C, which of these molecules will produce the greatest number of structural and/or geometric isomers? A) 2-butanol. B) Ethanol. C) 3-pentanol. D) 1-propanol. Show Answer Correct Answer: C) 3-pentanol. 14. On standing, phenol turns pink due to its ..... into phenoquinone. A) Elimination. B) Electrolysis. C) Reduction. D) Oxidation. Show Answer Correct Answer: D) Oxidation. 15. Type of alcohol where-OH is attached to a carbon atom having two other carbon atoms attached to it A) Primary. B) Tertiary. C) Quaternary. D) Secondary. Show Answer Correct Answer: D) Secondary. 16. (9.16) In asymmetric epoxides reacting with strong nucleophiles and acids, which carbon does the Nucleophile prefer to attack A) Carbon with a more positive charge. B) The less substituted carbon. C) Carbon that has a more electronegative functional group. D) The more substituted carbon. Show Answer Correct Answer: B) The less substituted carbon. 17. Identify the main difference between primary, secondary, and tertiary alcohols. A) The main difference lies in the number of carbon atoms attached to the carbon bearing the-OH group:primary (1), secondary (2), tertiary (3). B) The main difference is the presence of double bonds in the structure. C) The main difference is the molecular weight of the alcohols. D) The main difference is the boiling point of the alcohols. Show Answer Correct Answer: A) The main difference lies in the number of carbon atoms attached to the carbon bearing the-OH group:primary (1), secondary (2), tertiary (3). 18. Commonly used as general anesthetic A) RCOR. B) ROR. C) ROH. D) RCOOR. Show Answer Correct Answer: B) ROR. 19. Sodium metals can evolve Hydrogen when reacted with A) Water. B) Alcohols. C) Phenols. D) All of these. Show Answer Correct Answer: D) All of these. 20. Salicylic acid on reaction with zinc dust on heating gives what? A) Aspirin. B) Benzene. C) Phenol. D) Benzoic acid. E) Salicylaldehyde. Show Answer Correct Answer: D) Benzoic acid. 21. Acid or base catalyzed hydrolysis of epoxides gives ..... A) Cis-Vicinal glycols. B) Trans-Vicinal glycols. C) Can't Say. D) None. Show Answer Correct Answer: B) Trans-Vicinal glycols. 22. Which of the following isomeric alcohols is the most soluble in water? A) N-butyl alcohol. B) Tert-butyl alcohol. C) Isobutyl alcohol. D) Sec-butyl alcohol. Show Answer Correct Answer: B) Tert-butyl alcohol. 23. What reagents are used to cleave ether? A) Strong acid, $\Delta$. B) Strong base + 2 alkyl halide. C) Strong base + 3 alkyl halide. D) Strong base + 1 alkyl halide. Show Answer Correct Answer: A) Strong acid, $\Delta$. 24. What is the molecular formula of propanol? A) C$_{4}$H$_{10}$O. B) C$_{3}$H$_{7}$O. C) C$_{3}$H$_{8}$O. D) C$_{2}$H$_{6}$O. Show Answer Correct Answer: C) C$_{3}$H$_{8}$O. 25. Monochlorination of toluene in sunlight followed by hydrolysis with aqueous sodium hydroxide gives what? A) Benzyl alcohol. B) 2, 4-Dihydroxytoluene. C) M-Cresol. D) Benzal alcohol. E) No reaction. Show Answer Correct Answer: A) Benzyl alcohol. 26. What will be the main product(s) when 1 mole of Glyceraldehyde is treated with 2 moles of Periodic Acid? A) 3 HCOOH. B) 3HCHO. C) HCOOH + 2HCHO. D) HCHO + 2HCOOH. Show Answer Correct Answer: D) HCHO + 2HCOOH. 27. The only alcohol that cannot be prepared by the indirect hydration of alkene is:(1) ethyl alcohol (2) propyl alcohol (3) isobutyl alcohol (4) methyl alcohol A) 4. B) 2. C) 3. D) 1. Show Answer Correct Answer: A) 4. 28. What is the process called when an alcohol is converted into an alkene? A) Hydrolysis. B) Dehydration. C) Reduction. D) Oxidation. Show Answer Correct Answer: B) Dehydration. 29. Aqueous bromine will react with phenol to give a precipitate of 2, 4, 6-tribromophenol. What colour is this precipitate? A) White. B) Orange. C) Yellow. D) Cream. Show Answer Correct Answer: A) White. 30. CH3-OC2H5 + HI gives A, Product 1) CH3 I + C2H5OH (2) CH4 + C2H5OH (3) CH3CH2 I + CH3OH (4) CH3OH + CH3CH2OH A) 2. B) 3. C) 1. D) 4. Show Answer Correct Answer: C) 1. 31. How to draw 1-propanol? A) CH$_{3}$CH$_{2}$CH$_{2}$OH. B) CH$_{3}$CH$_{2}$CH$_{2}$CH$_{2}$CH$_{2}$OH. C) CH$_{3}$CH(OH)CH$_{3}$. D) CH$_{3}$CH$_{2}$CH$_{2}$ CH$_{2}$OH. Show Answer Correct Answer: A) CH$_{3}$CH$_{2}$CH$_{2}$OH. 32. Ethers can be classified according to the substituents that they have. Choose the option that shows this classification. A) Same and different. B) Symmetrical and unsymmetrical. C) Similar and unsimilar. D) Dimmetrical and unmmetrical. Show Answer Correct Answer: B) Symmetrical and unsymmetrical. 33. What is the name of reaction to prepared alcohols? A) Fermentation and Dehydration. B) Fermentation and Hydration. C) Fermentation and Esterification. D) Fermentation and Reaction with Na. Show Answer Correct Answer: B) Fermentation and Hydration. 34. Ethanol is produced when A) Ethane reacts with steam. B) Ethanoic acid reacts with oxygen. C) Ethene reacts with steam. D) Ethene reacts with oxygen. Show Answer Correct Answer: C) Ethene reacts with steam. 35. It is the simplest alcohol A) Methanol. B) Ethanol. C) Butanol. D) Propanol. Show Answer Correct Answer: A) Methanol. 36. The reaction of alcohols with sulphuric acid to give alkenes is A) Rearrangement. B) Elimination reaction. C) Addition reaction. D) Substitution reaction. Show Answer Correct Answer: B) Elimination reaction. 37. What is the acidity of phenol? A) Phenol is a strong acid. B) Phenol is a weak acid. C) Phenol is a base. D) Phenol is a neutral compound. Show Answer Correct Answer: B) Phenol is a weak acid. 38. Butanol is a member of the homologous series alcohols. which one of the following is not a formula of butanol? A) C$_{4}$H$_{10}$O. B) C$_{4}$H$_{9}$OH. C) CH$_{3}$CH$_{2}$CH$_{2}$CH$_{2}$OH. D) C$_{4}$H$_{10}$OH. Show Answer Correct Answer: D) C$_{4}$H$_{10}$OH. 39. (9.16) Which reactant can singlehandedly open epoxide rings? A) Bases. B) Nucleophile. C) Pyridine. D) H-Z acids. Show Answer Correct Answer: D) H-Z acids. 40. Phenols can be prepared from A) Cumene. B) Benzenediazonium chloride. C) From both Cumene and Diazonium chloride. D) Cannot be prepared from the above. Show Answer Correct Answer: C) From both Cumene and Diazonium chloride. 41. In comparison, phenol reacts readily then the benzene, so it is a/an: A) Nucleophile. B) Electrophile. C) Protophile. D) Both A and B. Show Answer Correct Answer: B) Electrophile. 42. The general formula for an ether is A) ROH. B) RH. C) ROR. D) REt. Show Answer Correct Answer: C) ROR. 43. Ketones are prepared by A) Oppenaur's oxidation. B) Clemmensen's reduction. C) Rosenmund's reduction. D) Cannizzaro reaction. Show Answer Correct Answer: C) Rosenmund's reduction. 44. Name the mechanism for the reaction between acyl chlorides and alcohols A) Nucleophilic addition. B) Nucleophilic addition-elimination. C) Nucleophilic substitution. D) None of the above. Show Answer Correct Answer: B) Nucleophilic addition-elimination. 45. State the name of the organic product made when 3-chloropentane reacts with aqueous potassium hydroxide A) Pentan-3-ol. B) 3-pentanone. C) Pentanol-3. D) 3-pentanol. Show Answer Correct Answer: A) Pentan-3-ol. 46. In the hydroboration-oxidation reaction of propene with diborane, hydrogen peroxide and sodium hydroxide, what is the product formed? A) Propan-1-ol. B) Tert-Butyl alcohol. C) Propan-2-ol. D) Ethanol. E) 2-Methylpropan-2-ol. Show Answer Correct Answer: A) Propan-1-ol. 47. List two common uses of ethers in the chemical industry. A) Solvents and chemical intermediates. B) Additives and stabilizers. C) Polymers and plastics. D) Reagents and catalysts. Show Answer Correct Answer: A) Solvents and chemical intermediates. 48. What reagent adds H in Syn positions? A) H3O+. B) H2 + Pt. C) Hg(OAc)2, EtNH2 + NaBH4. D) H2 + ROOR. Show Answer Correct Answer: B) H2 + Pt. 49. Mark the correct increasing order of reactivity of the following compounds with HBr/HCl. A) C < b < a. B) A < b < c. C) B < a < c. D) B < c < a. Show Answer Correct Answer: B) A < b < c. 50. Review from Module 5:What is the prefix used when referring to ring structures? A) Pyro-. B) Aro-. C) Cyclo-. D) None of the above. Show Answer Correct Answer: C) Cyclo-. 51. In Victor Meyer's test, Blood red coloration is given by A) Secondary Alcohol. B) Tertiary alcohol. C) Quaternary alcohol. D) Primary alcohol. Show Answer Correct Answer: D) Primary alcohol. 52. Ethanol can be converted to Ethanal by A) Treatment with KMnO4. B) Treatment with LiAlH4. C) Catalytic hydrogenation. D) Treatment with PCC. Show Answer Correct Answer: D) Treatment with PCC. 53. Dehydration of an alcohol gives A) A ketone. B) An alkane. C) An alkene. D) An aldehyde. Show Answer Correct Answer: C) An alkene. 54. Acidity of alcohols is determined by ..... A) Alkyl group. B) No of C atoms. C) Electronegativity. D) O-H bond polarity. Show Answer Correct Answer: D) O-H bond polarity. 55. Answer true or false to the following question. In naming alcohols, "alkyl alcohol" is the IUPAC form of the name, while "alkanol" is the common form of the name. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 56. What is the correct IUPAC name of isopropyl alcohol? A) Propane-1, 2-diol. B) Propan-2-ol. C) Propan-1-ol. D) Propane-1, 2, 3-triol. Show Answer Correct Answer: B) Propan-2-ol. 57. When phenol is treated with excess of bromine water, it gives which of the following product? A) M-bromophenol. B) O-and p-bromophenol. C) 2, 4-dibromophenol. D) 2, 4, 6-tribromophenol. Show Answer Correct Answer: D) 2, 4, 6-tribromophenol. 58. During the dehydration of alcohols to alkenes, what is the first step? A) Elimination of water. B) Formation of carbocation. C) Formation of ester. D) Protonation of carbocation. E) Protonation of alcohol. Show Answer Correct Answer: E) Protonation of alcohol. 59. Assertion:With HI, anisole gives iodobenzene and methylalcohol.Reason:Iodide ion combines with smaller group to avoidsteric hindrance. A) Assertion is correct, reason is incorrect. B) Assertion is correct, reason is correct; reason is not acorrect explanation for assertion. C) Assertion is correct, reason is correct; reason is a correctexplanation for assertion. D) Assertion is incorrect, reason is correct. Show Answer Correct Answer: D) Assertion is incorrect, reason is correct. 60. Which of the following has highest value of pKa A) Phenol. B) Ethanol. C) O-Nitrophenol. D) O-Cresol. Show Answer Correct Answer: D) O-Cresol. 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