MCQ Questions Chapter 11 Alcohols Phenols and Ethers Class 12 Chemistry

Please refer to MCQ Questions Chapter 11 Alcohols Phenols and Ethers Class 12 Chemistry with answers provided below. These multiple-choice questions have been developed based on the latest NCERT book for class 12 Chemistry issued for the current academic year. We have provided MCQ Questions for Class 12 Chemistry for all chapters on our website. Students should learn the objective based questions for Chapter 11 Alcohols Phenols and Ethers in Class 12 Chemistry provided below to get more marks in exams.

Chapter 11 Alcohols Phenols and Ethers MCQ Questions

Please refer to the following Chapter 11 Alcohols Phenols and Ethers MCQ Questions Class 12 Chemistry with solutions for all important topics in the chapter.

MCQ Questions Answers for Chapter 11 Alcohols Phenols and Ethers Class 12 Chemistry

Question. The correct order of boiling point for primary (1°), secondary (2°) and tertiary (3°) alcohols is 
(a) 1° > 2° > 3°
(b) 3° > 2° > 1°
(c) 2° > 1° > 3°
(d) 2° > 3° > 1°       

Question. The alcohol that produces turbidity immecliately with ZnCl₂ / cone. HCl at room temperature
(a) 1-hydroxy butane
(b) 2-hydroxy butane
(c) 2-hydroxy-2-methyl propane
(d) 1-hydroxy-2-methyl propane       

Question. Which one of the following alcohol is used as an antifreeze reagent for making explosives ?
(a) Glycerol
(b) Glycol
(c) Ethanol
(d) Phenol       

Question. Which one can differentiate between C₂H₅OH and CH₃OH?
(a) H₂O
(b) Na₂CO₃ + I₂
(c) NH3
(d) HCl     

Question. An unknown compound’ D’ first oxidised to aldehyde and then acetic acid by a dilute solution of K₂ Cr₂O₇ and H₂SO₄ . The compound ‘D’ is 
(a) CH₃OH
(b) C₂H₅OH
(c) CH₃CH₂COOH
(d) CH₃CH₂CHO     

Question. Ethylene glycol reacts with excess of PCI₅ to give
(a) 1, 1-dichloroethane 
(b) 1, 2-clichloroethane
(c) 1, 1, 1-trichloroethane
(d) 2, 2-clichloroethane         

Question. The correct order of reactivity of hydrogen halides with ethyl alcohol is 
(a) HF > HCl > HBr > HI
(b) HCl > HBr > HF > HI
(c) HBr > HCl > HI > HF
(d) HI > HBr > HCl > HF         

Question. Phenol on treatement with diethyl sulphate in presence of NaOH gives 
(a) phenetole
(b) anisole
(c) diphenyl ether
(d) diethyl ehter       

Question. A fruity smell is obtained by the reaction of ethanol with
(a) CH₃COCH₃
(b) PCI₅ 
(c) CH₃COOH
(d) CH₃CHO       

Question. Denatured alcohol is
(a) ethanol + methanol
(b) rectified spirit+ methanol + naphtha
(c) undistilled ethanol
(d) rectified spirit     

Question. Glycerol on heating with oxalic acid at 110°C gives
(a) ethanol
(b) methanoic acid 
(c) ether
(d) acetone           

Question. Among the following compounds which can be dehydrated very easily ? 

Question. Cyclohexanol on reaction with PBr₃ in presence of pyridine gives
(a) bromocyclohexene
(b) bromocyclohexane
(c) 1-bromocyclohexanol
(d) None of these         

Question.

36. Correct acidic order of the following compounds is

(a) I > II > III
(b) III > I > II
(c) II > III > I
(d) I > III > II         

Question. Which of the following reagents may be used to clistinguish between phenol and benzoic acid?
(a) Aqueous NaOH
(b) Tollen’s reagent
(c) Molisch reagent
(d) Neutral FeCI₃   

Question. The correct order of acid strength of the following compounds is
I. Phenol
II p-cresol
III. m-nitrophenol
IV. p-nitrophenol
(a) III > II > I > IV
(b) IV > III > I > II
(c) II > IV > I > III
(d) I > II > IV > III       

Question. In the reaction, A →_H2SO4^{K₂Cr₂C₇} acetone →^Oxidation aceticacid,A is
(a) 1-propano
(b) 2-butanoll
(c) 2-propanol
(d) ethanol         

Question, 

Question. lodoform reaction is answered by all, except
(a) CH₃—CH—CH₂—COOH
              l
             OH
(b) CH₃CHO
(c) CH₃—CH₂—OH
(d) CH₃—CH₂—CH₂OH   

Question. 2-propanol + NaBr →^Reflux X. What is X ? 
(a) 2-bromopropane
(b) Propane
(c) Propene
(d) Propanone       

Question. Which of the following will not react with NaOH?
(a) C₂H₅
(b) C₂H₅OH
(c) CH₃CONH₂
(d) CH(CN)₃       

Question. Lucas reagent is 
(a) cone. HCl and anhydrous ZnCI₂
(b) cone. HNO₃ and hydrous ZnCI₂
(c) cone. HCl and hydrous ZnCI₂
(d) cone. HNO₃ and anhydrous ZnCI₂       

Question. In the following reaction, X and Y respectively are
C₂H₅OH →^KMnO₄/H+ X →_{H2SO4 / Δ}^Y CH₃CO₂C₂H₅
(a) CH₃OH, C₂H₅OH
(b) CH₃CHO, CH₃OH
(c) CH₃CO₂ H, C₂H₅OH
(d) C₂H₄ , CH₃CO₂H       

Question. When phenol is treated with D₂SO₄ / D₂O , some of the hydrogens get exchanged. The final product in this exchange reaction is 

Question. X→^Y Benzoquinone, Identify X and y in the given reaction.

Question. When phenol is treated with excess of bromine water, it gives
(a) m-bromophenol
(b) o-and p-bromophenol
(c) 2, 4-dibromophenol
(d) 2,4,6-tribromophenol       

Question. CH3CH2OH →CI2step-1 CH3CHO →3CI2step-2 CI3CCHO In above reactions the role of Cl2 in step 1 and step 2 respectively is 
(a) oxidation, chlorination
(b) reduction, chlorination
(c) oxidation, addition
(d) reduction, substitution         

Question. Glycerol is oxidised by bismuth nitrate to produce 
(a) oxalic acid 
(b) meso oxalic acid
(c) glyceric acid
(d) glyoxylic acid     

Question. For the identification of β-naphthol using dye test, it is necessary to use
(a) dichloromethane solution of P-naphthol
(b) acidic solution of β-naphthol
(c) neutral solution of β-naphthol
(d) alkaline solution of β-naphthol     

Question. Sodiwn phenoxide when heated with CO₂ under pressure at 125° C yields a product which on acetylation produces C.

Question. Which of the following compounds will give positive iodoform test with I₂ and NaOH? 
(a) C₆H₅COC₆H₅
(b) CH₃CH₂CHO
(c) C₆H₅COCH₂CH₃
(d) C₆H₅—CH—CH₃
                l
                OH     

Question. Which of the following is dihydric alcohol? [Manipall
(a) Glycerol
(b) Ethylene glycol
(c) Catechol
(d) Resorcinol     

Question. An organic compound A containing C, H and O has a pleasant odour with boiling point of 78°C. On boiling A with concentrated H₂SO₄ , a colourless gas is produced which decolourises bromine water and alkaline KMnO₄ • The organic liquid A is
(a) C₂H₅Cl
(b) C₂H₅COOCH₃
(c) C₂H₅OH
(d) C₂H₆     

Question. The dehydration of butan-1-ol gives
(a) 1-butene as the main product
(b) 2-butene as the main product
(c) equal amounts of 1-butene and 2-butene
(d) 2-methyl propene     

Question. Methanol cannot be dried with anhydrous CaCl₂ because
(a) CaCI₂ dissolves in it
(b) it is not good dehydrating agent
(c) it forms a solid CaCI₂ ·4 CH₃OH
(d) it reacts with CH₃OH       

Question. In the reaction, C₂H₅OH →^Cu_300°C X  The molecular formula of X is
                                           (vapour)  
(a) C₄H₆O
(b) C₄H₁₀O
(c) C₂H₄O
(d) C₂H₆       

Question. The correct order of ease of dehydration of following is

(a) I > II > III
(b) III > II > I
(c) I > III > II
(d) III > I > II     

Question. Alcoholic beverages contain 
(a) iso-propyl alcohol
(b) n-propyl alcohol
(c) ethyl alcohol
(d) methyl alcohol       

Question. Which of the following compounds is most acidic?
(a) CH₄
(b) C₂H₆
(c) CH=CH
(d) C₂H₅OH     

Question. The reactivity of compound Z with different halogens under appropriate conditions is given below

The observed pattern of electrophilic substitution can be explained by 
(a) the steric effect on the halogen
(b) the steric effect of the tert-butyl group
(c) the electronic effect of the phenolic group
(d) the electronic effect of the tert-buty 1 group         

Question. Identify the correct product formed during the following reaction 

Question. What represents the best method producing salicylic acid?
(a) Benzoic acid, strong base, high temperature
(b) Toluene, strong base, water, high temperature
(c) Phenol, base, carbon dioxide then acid
(d) Bromobenzene, carbonic acid, high temperature   

Question.

In the above sequence, C is
(a) o-bromophenol
(b) p-bromophenol
(c) m-bromophenol
(d) 2, 4, 6-tribromophenol       

Question. The major product(s) of the following reaction is (are)

(a) P
(b) Q
(c) R
(d) S

Question. What reaction does hydroquinone undergo most readily?
(a) S_N2substitution
(b) Hydrolysis 
(c) Oxidation
(d) Reduction     

Question. In the following reaction, the product(s) formed is (are)

(a) P (major)
(b) Q (minor)
(c) R (minor)
(d) S (major)     

Question. Phenol is heated with a solution of mixture of KBr and KBrO₃ . The major product obtained in the above reaction is
(a) 2-bromophenol
(c) 4-bromophenol
(b) 3-bromophenol
(d) 2, 4, 6-tribromophenol     

Question. The conversion of m-nitrophenol to resorcinol involves respectively 
(a) hydrolysis, cliazotisation and reduction
(b) diazotisation, reduction and hydrolysis
(c) hydrolysis, reduction and cliazotisation
(d) reduction, cliazotisation and hydrolysis     

Question. Phenol can be converted too-hydroxy benzaldehyde by
(a) Kolbe’s reaction 
(b) Reimer-Tiemann reaction
(c) Wurtz reaction
(d) Cannizaro reaction
(e) Sandmeyer’s reaction     

Question. Two aromatic compounds having formula C₇H₈O which are easily identifiable by FeCI₃ solution test (violet colouration) are 
(a) o-cresol and benzyl alcohol
(b) m-cresol and p-cresol
(c) o-cresol and p-cresol
(d) methyl phenyl ether and benzyl alcohol     

Question. The correct order of decreasing acidity of nitrophenols will be
(a) m-nitrophenol > p-nitrophenol > o-nitrophenol
(b) o-nitrophenol > m-nitrophenol > p -nitrophenol
(c) p -nitrophenol > m-nitrophenol > o-nitrophenol
(d) p-nitrophenol > o-nitrophenol > m-nitrophenol     

Question. Phenol →^X forms a tribromo derivative “X” is 
(a) bromine in benzene
(b) bromine in water
(c) potassium bromide solution
(d) bromine in carbon tetrachloride at 0°C     

Question. The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is
(a) benzoic acid
(b) salicylaldehyde
(c) salicylic acid
(d) phthalic acid       

Question. The order of melting point ofortho, para, meta nitrophenol is 
(a) o > m > p
(b) p > m > o
(c) m > p > o
(d) p > o > m       

Question. Consider the following reaction, 
C₂H₅OH + H₂SO₄ → Product
Among the following, which one cannot be formed as a product under any conditions? 
(a) Ethyl hydrogen sulphate
(b) Ethylene
(c) Acetylene
(d) Diethyl ether     

Question. During dehydration of alcohols to alkenes by heating with concentrated H₂SO₄ the initiation step is 
(a) protonation of alcohol molecule
(b) formation of carbocation
(c) elimination of water
(d) formation of an ester         

Question. Chlorobenzene →^Reaction_X Phenol →^Reaction_Y
                                                                 Salicylaldehyde                
X and Y reactions are respectively ….. .
(a) Fries rearrangement and Kolbe-Schmidt 
(b) Cumene and Reimer-Tiemann
(c) Dow and Reimer-Tiemann
(d) Dow and Friedel-Craft       

Question. Acidity of phenol is due to
(a) hydrogen bonding
(b) phenolic group
(c) benzene ring
(d) resonance stabilisation of its anion     

Question. In the reaction for dinitration

The major dinitrated productXis    

Question. Phenol, when it first reacts with concentrated sulphuric acid and then with concentrated nitric acid, gives
(a) 2, 4, 6-trinitrobenzene
(b) o-nitrophenol 
(c) p -nitrophenol
(d) nitrobenzene 

Question. An organic acid without a carboxylic acid group is
(a) picric acid
(b) oxalic acid
(c) vinegar
(d) ascorbic acid       

Question. When ethyl alcohol is heated with cone. H₂SO₄ , the product obtained is 
(a) CH₃COOC₂H₅
(b) C₂H₂
(c) C₂H₆
(d) C₂H₄     

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