MCQ Questions for Class 12 Chemistry with Answers<\/a> are prepared as per the Latest Exam Pattern. Students can solve these Alcohols, Phenols and Ethers Class 12 MCQs Questions with Answers and assess their preparation level.<\/p>\nAlcohols, Phenols and Ethers Class 12 MCQs Questions with Answers<\/h2>\n
Solving the Alcohols, Phenols and Ethers Multiple Choice Questions of Class 12 Chemistry Chapter 11 MCQ can be of extreme help as you will be aware of all the concepts. These MCQ Questions on Alcohols, Phenols and Ethers Class 12 with answers pave for a quick revision of the Chapter thereby helping you to enhance subject knowledge. Have a glance at the MCQ of Chapter 11 Chemistry Class 12 and cross-check your answers during preparation.<\/p>\n
Question 1.
\nDehydration of tertiary alcohols with Cu at 573 gives
\n(a) Aldehydes
\n(b) Ketones
\n(c) Alkenes
\n(d) None of these<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (c) Alkenes<\/p>\n<\/details>\n
\nQuestion 2.
\nMolecular formula of ethers is:
\n(a) Cn<\/sub>H2n+2<\/sub>O
\n(b) Cn<\/sub>H2n<\/sub>O
\n(c) Cn<\/sub>H2n+1<\/sub>O
\n(d) None of these<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (a) Cn<\/sub>H2n+2<\/sub>O<\/p>\n<\/details>\n
\nQuestion 3.
\nWilliamson\u2019s synthesis is an example of:
\n(a) Nucleophilic substitution reaction
\n(b) Nucleophilic addition
\n(c) Electrophilic substitution
\n(d) None of the above<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (a) Nucleophilic substitution reaction<\/p>\n<\/details>\n
\nQuestion 4.
\nReaction used for the preparation of ethers is
\n(a) Reimer-Tiemann reaction
\n(b) Williamson\u2019s synthesis
\n(c) Wurtz reaction
\n(d) Cannizzaro reaction<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (b) Williamson\u2019s synthesis<\/p>\n<\/details>\n
\nQuestion 5.
\nThe test used to distinguish alcohols from one another is known as
\n(a) Hinsberg\u2019s test
\n(b) 2, 4-DNP test
\n(c) Iodoform test
\n(d) Lucas Lest<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (d) Lucas Lest<\/p>\n<\/details>\n
\nQuestion 6.
\nThe IUPAC name of
\n
\n(a) Propane-1, 3-diol
\n(b) Propane-1, 2-diol
\n(c) Propane -1, 2, 3-triol
\n(d) Glycerol<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (c) Propane -1, 2, 3-triol<\/p>\n<\/details>\n
\nQuestion 7.
\nEthers on hydrolysis give
\n(a) carboxylic acid
\n(b) alcohol
\n(c) ester
\n(d) ketone<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (b) alcohol<\/p>\n<\/details>\n
\nQuestion 8.
\nWhich of the following has highest boiling point?
\n(a) Methanol
\n(b) Ethanol
\n(c) Propan-1 -ol
\n(d) Butan-1-ol<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (d) Butan-1-ol<\/p>\n<\/details>\n
\nQuestion 9.
\nWhich has highest value of pKa<\/sub>?
\n(a) Phenol
\n(b) Ethanol
\n(c) o-Nitrophenol
\n(d) o-Cresol<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (b) Ethanol<\/p>\n<\/details>\n
\nQuestion 10.
\nWhich of the following is most acidic?
\n(a) Benzyl alcohol
\n(b) Cyclohexanol
\n(c) Phenol
\n(d) m-Chlorophenol.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (d) m-Chlorophenol.<\/p>\n<\/details>\n
\nQuestion 11.
\nPhenols on reaction with cone. HNO3<\/sub> in the presence of cone. H2<\/sub>SO4<\/sub> give
\n(a) o-nitrophenol
\n(b) m-nitrophenol
\n(c) p-nitrophenol
\n(d) 2,4,6-trinitrophenol.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (d) 2,4,6-trinitrophenol.<\/p>\n<\/details>\n
\nQuestion 12.
\nMethanol and ethanol can be distinguished by using
\n(a) Fehling\u2019s test
\n(b) Iodoform test
\n(c) Tollen\u2019s test
\n(d) Carbylamine test.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (b) Iodoform test<\/p>\n<\/details>\n
\nQuestion 13.
\nThe IUPAC name of the compound
\n
\n(a) 2-Chloro-3,4-dimethyl-n-pentyl alcohol
\n(b) 2-Chloro-3,4-dimethylpentan-5-ol
\n(c) 4-Chloro-2,3-dimethylpentan-1 -ol
\n(d) 2,3-Dimethyl-4-chloropentan-1 -ol.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (c) 4-Chloro-2,3-dimethylpentan-1 -ol<\/p>\n<\/details>\n
\nQuestion 14.
\n
\nA will be
\n(a) CH2<\/sub>=CH2<\/sub>
\n(b) C2<\/sub>H5<\/sub>OCH3<\/sub>
\n(c) (C2<\/sub>H5<\/sub>)2<\/sub>O
\n(d) CH3<\/sub>CH2<\/sub>CH2<\/sub>CH3<\/sub><\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (c) (C2<\/sub>H5<\/sub>)2<\/sub>O<\/p>\n<\/details>\n
\nQuestion 15.
\nWhich is weakest acid in the following?
\n(a) CH3<\/sub>OH
\n(b) (CH3<\/sub>)2<\/sub>CHOH
\n(c) CH3<\/sub>CH2<\/sub>OH
\n(d) (CH3<\/sub>)3<\/sub>COH<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (a) CH3<\/sub>OH<\/p>\n<\/details>\n
\nQuestion 16.
\nWilliamson synthesis is used to prepare:
\n(a) Alcohol
\n(b) Amine
\n(c) Ketone
\n(d) Ether<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (d) Ether<\/p>\n<\/details>\n
\nQuestion 17.
\nIn the reaction
\n
\nA and B are:
\n(a) C6<\/sub>H5<\/sub>l, CH3<\/sub>OH
\n(b) C6<\/sub>H5<\/sub>OH, CH3<\/sub>l
\n(c) C6<\/sub>H5<\/sub>CH2<\/sub>OH, CH3<\/sub>l
\n(d) CH3<\/sub>CH2<\/sub>l, C6<\/sub>H5<\/sub>OH<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (b) C6<\/sub>H5<\/sub>OH, CH3<\/sub>l<\/p>\n<\/details>\n
\nQuestion 18.
\nThe IUPAC name of
\n
\n(a) 2-Cyclopropoxybutane
\n(b) 2-Propoxybutane
\n(c) 2-Propoxypropane
\n(d) 2-Methyl-2-propoxypropane<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (a) 2-Cyclopropoxybutane<\/p>\n<\/details>\n
\nQuestion 19.
\nNeutral ferric chloride test can be used to distinguish between
\n(a) Alcohols and ethers
\n(b) Aldehydes and ketones
\n(c) Amines and aldehyde
\n(d) Phenols and alcohols<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (d) Phenols and alcohols<\/p>\n<\/details>\n
\nQuestion 20.
\nOn reaction with aqueous bromine at room temperature, phenol forms which of the following?
\n(a) meta-Bromophenol
\n(b) 2, 6-Dibromophenol
\n(c) 2, 4, 6-Tribromophenol
\n(d) 3, 5-Dibromophenol<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (c) 2, 4, 6-Tribromophenol<\/p>\n<\/details>\n
\nQuestion 21.
\nHow many alcohols with molecular formula C4<\/sub>H10<\/sub>O are chiral in nature?
\n(a) 1
\n(b) 2
\n(c) 3
\n(d) 4<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (a) 1<\/p>\n<\/details>\n
\nQuestion 22.
\nWhat is the correct order of reactivity of alcohols in the following reaction?
\n
\n(a) 1\u00b0 > 2\u00b0 > 3\u00b0
\n(b) 1\u00b0 < 2\u00b0 > 3\u00b0
\n(c) 3\u00b0 > 2\u00b0 > 1\u00b0
\n(d) 3\u00b0 > 1\u00b0 > 2\u00b0<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (c) 3\u00b0 > 2\u00b0 > 1\u00b0<\/p>\n<\/details>\n
\nQuestion 23.
\nCH3<\/sub>CH2<\/sub>OH can be converted into CH3<\/sub>CHO by
\n(\u0430) catalytic hydrogenation
\n(b) treatment with LiAlH4<\/sub>
\n(c) treatment with pyridinium chlorochromate
\n(d) treatment with KMnO4<\/sub><\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (c) treatment with pyridinium chlorochromate<\/p>\n<\/details>\n
\nQuestion 24.
\nThe process of converting alkyl halides into alcohols involves
\n(a) addition reaction
\n(b) substitution reaction
\n(c) dehydrohalogenation reaction
\n(d) rearrangement reaction<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (b) substitution reaction<\/p>\n<\/details>\n
\nQuestion 25.
\nWhich of the following compounds is aromatic alcohol?
\n
\n(a) A, B, C, D
\n(b) A, D
\n(c) B, C
\n(d) A<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (c) B, C<\/p>\n<\/details>\n
\nQuestion 26.
\nGive IUPAC name of the compound given below.
\n
\n(a) 2-Chloro-5-hydroxyhexane
\n(b) 2-Hydroxy-5-chlorohexane
\n(c) 5-Chlorohexan-2-ol
\n(d) 2-Chlorohexan-5-ol<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (c) 5-Chlorohexan-2-ol<\/p>\n<\/details>\n
\nQuestion 27.
\nIUPAC name of m-cresol is
\n(a) 3-methylphenol
\n(b) 3-chlorophenol
\n(c) 3-methoxyphenol
\n(d) benzene-1,3-diol<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (a) 3-methylphenol<\/p>\n<\/details>\n
\nQuestion 28.
\nIUPAC name of the compound
\n
\n(a) 1-methoxy-1-methylethane
\n(b) 2-methoxy-2-methylethane
\n(c) 2-methoxypropane
\n(d) isopropylmethyl ether<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (c) 2-methoxypropane<\/p>\n<\/details>\n
\nQuestion 29.
\nWhich of the following species can act as the strongest base?
\n(a) \u0398<\/sup>OH
\n(b) \u0398<\/sup>OR
\n(c) \u0398<\/sup>OC6<\/sub>H5<\/sub>
\n<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (b) \u0398<\/sup>OR<\/p>\n<\/details>\n
\nQuestion 30.
\nWhich of the following compounds will react with sodium hydroxide solution in water?
\n(a) C6<\/sub>H5<\/sub>OH
\n(b) C6<\/sub>H5<\/sub>CH2<\/sub>OH
\n(c) (CH3<\/sub>)3<\/sub>COH
\n(d) C2<\/sub>H5<\/sub>OH<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (a) C6<\/sub>H5<\/sub>OH<\/p>\n<\/details>\n
\nQuestion 31.
\nPhenol is less acidic than
\n(a) ethanol
\n(b) o-nitrophenol
\n(c) o-methylphenol
\n(d) o-methoxyphenol<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (d) o-methoxyphenol<\/p>\n<\/details>\n
\nQuestion 32.
\nWhich of the following is most acidic?
\n(a) Benzyl alcohol
\n(b) Cyclohexanol
\n(c) Phenol
\n(d) m-Chlorophenol<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (d) m-Chlorophenol<\/p>\n<\/details>\n
\nQuestion 33.
\nMark the correct order of decreasing acid strength of the following compounds.
\n
\n(a) E>D>B>A>C
\n(b) B>D>A>C>E
\n(c) D>E>C>B>A
\n(d) E>D>C>B>A<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (b) B>D>A>C>E<\/p>\n<\/details>\n
\nQuestion 34.
\nMark the correct increasing order of reactivity of the following compounds with
\n
\n(a) (i) < (ii) < (iii)
\n(b) (ii) < (i) < (iii)
\n(c) (ii) < (iii) < (i)
\n(d) (iii) < (ii) < (i)<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (c) (ii) < (iii) < (i)<\/p>\n<\/details>\n
\nQuestion 35.
\nArrange the following compounds in increasing order of boiling point.
\nPropan-1-ol, butan-1-ol, butan-2-ol, pentan-1-ol
\n(a) Propan-1-ol, butan-2-ol, butan-1-ol, pentan-1-ol
\n(b) Propan-1-ol, butan-1-ol, butan-2-ol, pentan-1-ol
\n(c) Pentan-1-ol, butan-2-ol, butan-1-ol, propan-1 -ol
\n(d) Pentan-1-ol, butan-1-ol, butan-2-ol, propan-1 -ol<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (a) Propan-1-ol, butan-2-ol, butan-1-ol, pentan-1-ol<\/p>\n<\/details>\n
\nAssertion and Reason Type Questions<\/span><\/p>\nThe questions given below consist of an assertion and a reason. Use the following key to choose the appropriate answer.
\n(a) Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct explanation of the Assertion (A).
\n(b) Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A).
\n(c) Assertion (A) is correct, Reason (R) is wrong statement.
\n(d) Assertion (A) is wrong, but Reason (R) is correct statement.<\/p>\n
Question 36.
\nAssertion: C2<\/sub>H5<\/sub>OH is a weaker base than phenol but is a stronger nucleophile than phenol.
\nReason: In phenol the lone pair of electrons on oxygen is withdrawn towards the ring due to resonance.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (d) Assertion (A) is wrong, but Reason (R) is correct statement.<\/p>\n<\/details>\n
\nQuestion 37.
\nAssertion: The boiling points of alcohols are higher than those of hydrocarbons of comparable molecular mass.
\nReason: Alcohols show intramolecular hydrogen bonding.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (c) Assertion (A) is correct, Reason (R) is wrong statement.<\/p>\n<\/details>\n
\nQuestion 38.
\nAssertion: Phenol undergoes Kolbe\u2019s reaction but ethanol does not.
\nReason: Phenol is more acidic than ethanol.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (b) Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A).<\/p>\n<\/details>\n
\nQuestion 39.
\nAssertion: The C-O-C bond angle in ethers is higher than H-O-H bond angle in water.
\nReason: Oxygen in both ethers and water is sp\u00b3 hybridised.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (b) Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A).<\/p>\n<\/details>\n
\nQuestion 40.
\nAssertion: The boiling point of diethyl ether is much less than that of ethanol.
\nReason: In ethanol, the molecules are associated by the formation of intermolecular hydrogen bonding, whereas in diethyl ether, it is not possible.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (a) Both Assertion (A) and Reason (R) are correct statements, and Reason (R) is the correct explanation of the Assertion (A).<\/p>\n<\/details>\n
\nQuestion 41.
\nAssertion: Alcohols have higher boiling points than ethers of comparable molecular masses.
\nReason: Alcohols and ethers are isomeric compounds.<\/p>\n\nAnswer<\/span><\/summary>\nAnswer: (b) Both Assertion (A) and Reason (R) are correct statements, but Reason (R) is not the correct explanation of the Assertion (A).<\/p>\n<\/details>\n
\nQuestion 42.
\nAssertion: o- and p-nitrophenols can be separated by steam distillation.
\nReason: o-isomer is steam volatile due to chelation, while p-isomer is not steam volatile due to association of molecules by intermolecular H-bonding.<\/p>\n\n