This quiz works best with JavaScript enabled. Home > Cbse > Class 12 > Science > Chemistry Part Ii > Class 12 Chemistry (Part Ii) Chapter 11 Alcohols – Quiz 5 🏠 Homepage 📘 Download PDF Books 📕 Premium PDF Books Class 12 Chemistry (Part Ii) Chapter 11 Alcohols Quiz 5 (60 MCQs) Quiz Instructions Select an option to see the correct answer instantly. 1. Cholesterol is an organic molecule that occurs in the blood stream. What type of compound is cholesterol? A) An acid. B) An alkene. C) An alkane. D) An alcohol. Show Answer Correct Answer: D) An alcohol. 2. Assertion:At isoelectric point, the amino group does notmigrate under the influence of electric field.Reason:At isoelectric point, amino acid exists as azwitterion. A) Assertion is correct, reason is incorrect. B) Assertion is correct, reason is correct; reason is not acorrect explanation for assertion. C) Assertion is incorrect, reason is correct. D) Assertion is correct, reason is correct; reason is a correctexplanation for assertion. Show Answer Correct Answer: D) Assertion is correct, reason is correct; reason is a correctexplanation for assertion. 3. (9.11) How can alcohols undergo substitution reactions A) They are oxidized or reduced to be more reactive. B) They do not need modification to undergo substitution. C) Converted into a better leaving group with HX. D) They can't under any circumstance. Show Answer Correct Answer: C) Converted into a better leaving group with HX. 4. Which class of compound will be formed when NaBH$_{4}$ reacts with ketones? A) Primary alcohols. B) Chloroalkanes. C) Alkene. D) Secondary alcohols. Show Answer Correct Answer: D) Secondary alcohols. 5. What type of homologous series reacts with alcohols to form esters? A) Alkanes. B) Alkenes. C) Carboxylic acids. D) Cycloalkanes. Show Answer Correct Answer: C) Carboxylic acids. 6. CH3CH2OH can be converted into CH3CHO by ..... A) Catalytic hydrogenation. B) Treatment with KMnO4. C) Treatment with LiAlH4. D) Treatment with pyridinium chlorochromate. Show Answer Correct Answer: A) Catalytic hydrogenation. 7. A compound X with molecular formula C3H8O can be oxidised to Y with molecular formula C3H6O2. X is most likely ..... A) An aldehyde. B) A primary alcohol. C) A ketone. D) A secondary alcohol. Show Answer Correct Answer: B) A primary alcohol. 8. What observations would you expect to see in a positive Fehlings test for an aldehyde? A) Blue solution to brick-red solid. B) Blue solution to brick-red solution. C) Blue solid to brick-red solid. D) Blue solid to brick-red solution. Show Answer Correct Answer: A) Blue solution to brick-red solid. 9. Assertion:Ethyl phenyl ether on reaction with HBr formphenol and ethyl bromide.Reason:Cleavage of C-O bond takes place on ethyloxygenbond due to the more stable phenyl-oxygen bond A) Assertion is correct, reason is incorrect. B) Assertion is correct, reason is incorrect. C) Assertion is correct, reason is correct; reason is a correctexplanation for assertion. D) Assertion is correct, reason is correct; reason is not acorrect explanation for assertion. Show Answer Correct Answer: A) Assertion is correct, reason is incorrect. 10. (9.8) what is another name for the elimination reaction of alcohols A) Dehydration. B) Dehalogenation. C) Dehydrohalogenation. D) Alkenization. Show Answer Correct Answer: A) Dehydration. 11. Lucas test is done for:(1) alkyl halides (2) alcohols (3) acids (4) aldehydes A) 3. B) 2. C) 4. D) 1. Show Answer Correct Answer: B) 2. 12. Answer true or false to the following question. PCC will oxidize a primary alcohol to a carboxylic acid. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 13. Why was ether replaced with other sedatives for anesthesia during surgery? A) Ether caused permanent brain damage. B) The sweet smell of ether is unpleasant for many patients. C) Ether is flammable. D) Sometimes, ether may wear off during surgery. Show Answer Correct Answer: C) Ether is flammable. 14. The reaction which can be used for Distinguition of phenol and aniline is A) Coupling reaction. B) Fehling test. C) Tollen's test. D) Lucas test. Show Answer Correct Answer: A) Coupling reaction. 15. The type of alcohol in alcoholic beverages is called A) Detoxification. B) Ethanol. C) Fermentation. D) Vodka. Show Answer Correct Answer: B) Ethanol. 16. Amines can be changed into alcohols by A) Aq. KOH. B) HNO$_{3}$. C) HNO$_{2}$. D) Acidified KMnO$_{4}$. Show Answer Correct Answer: C) HNO$_{2}$. 17. Which of the following are not used to convert RCHO into RCH2OH? A) H2 /Pd. B) NaBH4. C) Reaction with RMgX followed by hydrolysis. D) LiAlH4. Show Answer Correct Answer: C) Reaction with RMgX followed by hydrolysis. 18. Copper vapours are used to carry out oxidation at:- A) 537K. B) 573K. C) 577K. D) None of the above. Show Answer Correct Answer: B) 573K. 19. What type of reaction do alcohols typically undergo when treated with acids? A) Substitution reaction. B) Oxidation reaction. C) Hydrogenation reaction. D) Dehydration reaction. Show Answer Correct Answer: D) Dehydration reaction. 20. Which one gives blue colour in Victor Meyer's test? A) Ethanol. B) 2-butanol. C) 1-butanol. D) 2-methyl 2-propanol. Show Answer Correct Answer: B) 2-butanol. 21. Which one gives turbidity immediately with Lucas reagent? A) 2-methyl 1-propanol. B) 2-methyl 2-propanol. C) 1-propanol. D) 2-propanol. Show Answer Correct Answer: B) 2-methyl 2-propanol. 22. What is the role of phenols in biological systems? A) Phenols act as antioxidants, signaling molecules, and precursors for biomolecules in biological systems. B) Phenols are primarily used for energy storage in cells. C) Phenols function mainly as enzymes in metabolic pathways. D) Phenols serve as structural components in cell membranes. Show Answer Correct Answer: A) Phenols act as antioxidants, signaling molecules, and precursors for biomolecules in biological systems. 23. (9.3) What is the common name of CH3CH2CH2-O-CH2CH3 A) Ethyl propyl ethoxide. B) Ethyl propyl ether. C) Propyl ethyl ether. D) Dipropyl ether. Show Answer Correct Answer: B) Ethyl propyl ether. 24. The ether substituent is named ..... A) -alkoxy. B) -methoxy. C) -phenoxy. D) -hydroxy. Show Answer Correct Answer: A) -alkoxy. 25. Aldehydes and ketones can be reduced to primary and secondary alcohols by using what chemical? A) LiBH4. B) NaAlH4. C) LiAlH4. D) NaBH4. Show Answer Correct Answer: D) NaBH4. 26. Which of the following phenols has the highest pKa value? A) P-Nitrophenol. B) P-Cresol. C) O-Cresol. D) O-Nitrophenol. E) Phenol. Show Answer Correct Answer: B) P-Cresol. 27. Which process does not occur during the formation of CHCl3 from ethanol and bleaching powder? A) Oxidation. B) Chlorination. C) Hydrolysis. D) Elimination. Show Answer Correct Answer: D) Elimination. 28. What will propanol, C$_{3}$H$_{7}$OH, form on complete oxidation? A) C$_{2}$H$_{5}$CO$_{2}$H. B) C$_{4}$H$_{9}$CO$_{2}$H. C) C$_{3}$H$_{7}$CO$_{2}$H. D) CH$_{3}$CO$_{2}$H. Show Answer Correct Answer: A) C$_{2}$H$_{5}$CO$_{2}$H. 29. What acts as the nucleophile in the reaction between chloroethane and warm aqueous sodium hydroxide? A) Chloroethane molecule (C2H5Cl). B) Hydroxide ion (OH-). C) Sodium ion (Na+). D) Water molecule (H2O). Show Answer Correct Answer: B) Hydroxide ion (OH-). 30. Phenol when treated with excess of bromine water gives a white precipitate of A) O-bromophenol. B) P-bromophenol. C) Bromobenzene. D) 2, 4, 6-tribromophenol. Show Answer Correct Answer: D) 2, 4, 6-tribromophenol. 31. In the reaction of phenol with sodium hydroxide, what does phenol behave as? A) Lewis acid. B) Bronsted base. C) Lewis base. D) Bronsted acid. E) Arrhenius base. Show Answer Correct Answer: D) Bronsted acid. 32. (9.13) From an alcohol to alkyl tosylate to substitution product, when is there an inversion at the stereogenic center A) From alcohol to alkyl tosylate. B) From alkyl tosylate to substitution product. C) Both. D) Neither. Show Answer Correct Answer: B) From alkyl tosylate to substitution product. 33. Williamson's synthesis gives best results when sodium alkoxide reacts with ..... A) Tertiary alcohol. B) Primary alkyl halides. C) Tertiary alkyl halide. D) Primary alcohol. Show Answer Correct Answer: B) Primary alkyl halides. 34. A reacts with oxygen gas followed by hydrolysis in acid medium products are phenol and acetone. which statement is not correct A) Intermediate formed is a peroxide. B) A is cumene. C) A is isopropyl benzene. D) A may be any alkyl benzene. Show Answer Correct Answer: D) A may be any alkyl benzene. 35. One mole of ethyl acetate on tatment with an excess of LiAlH4 in dry ether and subsequent acidification produces A) 1 mole ethyl alcohol + 1 mole methyl alcohol. B) 2 moles of ethyl alcohol. C) 1 mole of 2-butanol. D) 1 mole acetic acid + 1 mole ethyl alcohol. Show Answer Correct Answer: B) 2 moles of ethyl alcohol. 36. CH$_{3}$CH$_{2}$OH is the formula of which alcohol? A) Propanol. B) Methanol. C) Butanol. D) Ethanol. Show Answer Correct Answer: D) Ethanol. 37. Which one of the following compounds is NOT an isomer of the others? A) 1-Butanol. B) Diethyl ether. C) Methyl-propyl ether. D) Isopropanol. Show Answer Correct Answer: D) Isopropanol. 38. The test to distinguish between phenol and benzoic acid is A) Ferric chloride test. B) Feeling solution test. C) Tollen's reagent test. D) Iodoform test. Show Answer Correct Answer: A) Ferric chloride test. 39. Why alcohols is higher boiling point than alkanes? A) Because can form dimer structures between molecules. B) Because can form Van der Waal's forces between molecules. C) Because can form hydrogen bond forces between molecules. D) Because can form covalent bond between molecules. Show Answer Correct Answer: C) Because can form hydrogen bond forces between molecules. 40. Which alcohol is most soluble in water? A) Pentan-2-ol. B) Tert-butyl alcohol. C) Propan-1-ol. D) Isobutyl alcohol. Show Answer Correct Answer: C) Propan-1-ol. 41. What is the general formula for alcohol functional groups? A) CnH2nOH. B) CnH2n-1OH. C) CnH2n+2OH. D) CnH2n+1OH. Show Answer Correct Answer: D) CnH2n+1OH. 42. Which one of the following does not belong to the same homologous series as methanol? A) C$_{7}$H$_{15}$OH. B) C$_{4}$H$_{7}$OH. C) C$_{2}$H$_{5}$OH. D) C$_{5}$H$_{11}$OH. Show Answer Correct Answer: B) C$_{4}$H$_{7}$OH. 43. Conversion of Salicylic acid to Aspirin is an example of ..... A) Esterification reaction. B) Rearrangement reaction. C) Alkylation reaction. D) Dehydration reaction. Show Answer Correct Answer: A) Esterification reaction. 44. Which of the following, when added to 2-methylbutanoic acid, would produce bubbles? A) Mg and NaOH. B) NaOH and Na$_{2}$CO$_{3}$. C) Mg only. D) Mg & Na$_{2}$CO$_{3}$. Show Answer Correct Answer: D) Mg & Na$_{2}$CO$_{3}$. 45. PCC is specific reagent for A) Oxidation of secondary alcohol into ketone. B) Oxidation of secondary alcohol into acid. C) Oxidation of primary alcohol into aldehyde. D) Oxidation of primary alcohol into acid. Show Answer Correct Answer: C) Oxidation of primary alcohol into aldehyde. 46. 3 moles of ethanol react with one mole of phosphorus tribromide to form 3 moles of ethyl bromide and one mole of X. What is X? A) Hypophosphorous acid. B) Phosphoric acid. C) Peroxymonophosphoric acid. D) Phosphorous acid. E) Metaphosphoric acid. Show Answer Correct Answer: D) Phosphorous acid. 47. The major product when phenol is treated with PCl$_{5}$ A) Chlorobenzene. B) Triphenylphosphate. C) O-chlorophenol. D) P-chlorophenol. Show Answer Correct Answer: B) Triphenylphosphate. 48. Select the true statement about phenol in water. A) Phenol is more soluble than alcohols and partially dissociates. B) Phenol is less soluble than alcohols and partially dissociates. C) Phenol is more soluble than alcohols and fully dissociates. D) Phenol is less soluble than alcohols and fully dissociates. Show Answer Correct Answer: B) Phenol is less soluble than alcohols and partially dissociates. 49. Phenol can be converted to nitrobenezene by treating Phenol with A) Nitration mixture. B) Nitro compound. C) From both the above. D) Cannot be prepared from the above. Show Answer Correct Answer: A) Nitration mixture. 50. Acetophenone is prepared from A) Friedel craft reaction. B) Rosenmund reaction. C) Sandmayer reaction. D) Wurtz reaction. Show Answer Correct Answer: A) Friedel craft reaction. 51. Give IUPAC name of the compound given below. A) 2-Chloro-5-hydroxyhexane. B) 2-Chlorohexan-5-ol. C) 2-Hydroxy-5-chlorohexane. D) 5-Chlorohexan-2-ol. Show Answer Correct Answer: D) 5-Chlorohexan-2-ol. 52. To convert phenol into p bromo phenol what reagent should be used? A) Bromine in CS$_{2}$. B) HBr. C) Bromine water. D) Bromine with FeBr$_{3}$. Show Answer Correct Answer: A) Bromine in CS$_{2}$. 53. When halogenation takes place 'in situ', which of the following is/are added to the reaction flask, in addition to the alcohol? A) A hydrogen halide. B) Sulfuric acid and an alkali metal halide, such as NaBr. C) An alkali metal halide such as NaBr. D) Sulfuric acid, NaCl AND HBr. Show Answer Correct Answer: B) Sulfuric acid and an alkali metal halide, such as NaBr. 54. Vinegar tastes sour because of A) Ethyl ethanoate. B) Butanoic acid. C) Ethanoic acid. D) Ethanol. Show Answer Correct Answer: C) Ethanoic acid. 55. These physical and chemical properties of phenols are mainly due to the presence of the aryl group. A) True. B) False. C) All the above. D) None of the above. Show Answer Correct Answer: B) False. 56. Which of the following is most acidic in nature? A) $\left(CH_3\right)_2CHOH$. B) $CH_3OH$. C) $C_2H_5OH$. D) $\left(CH_3\right)_3COH$. Show Answer Correct Answer: B) $CH_3OH$. 57. In alcohols, what happens to the water solubility when the number of carbons are increased? A) Increase. B) Decrease. C) All the above. D) None of the above. Show Answer Correct Answer: B) Decrease. 58. Among water, alcohol, phenol which is least acidic? A) Can't be compared. B) Water. C) Alcohol. D) Phenol. Show Answer Correct Answer: C) Alcohol. 59. (9.7) What is done to alcohols to allow them to undergo substitution and elimination? A) Treated with an acid. B) They are reduced. C) They are oxidized. D) Treated with a base. Show Answer Correct Answer: A) Treated with an acid. 60. Which of the following statements is NOT TRUE of ethanol? A) It forms carboxylic acid when reduced. B) It is used as a fuel. C) It forms misty fumes with PCl5. D) It is a primary alcohol. Show Answer Correct Answer: A) It forms carboxylic acid when reduced. ← 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 3Class 12 Chemistry (Part Ii) Chapter 11 Alcohols Quiz 4Class 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