CBSE Class 12 Chemistry Alcohols Phenols and Ethers MCQs Set B

Question. Lucas reagent is       
(a) conc. HCl and anhydrous ZnCl₂
(b) conc. HNO₃ and hydrous ZnCl₂
(c) conc. HCl and hydrous ZnCl₂
(d) conc. HNO₃ and anhydrous ZnCl₂.

Answer : A

Question. Methanol is industrially prepared by       
(a) oxidation of CH₄ by steam at 900ºC
(b) reduction of HCHO using LiAIH₄
(c) reaction of HCHO with a solution of NaOH
(d) reduction of CO using H₂ and ZnO–Cr₂O₃

Answer : D

Question. The major products C and D formed in the following reactions respectively are H₃C−CH₂−CH₂−O−C(CH₃)₃ excess HI C + D
(a) H₃C−CH₂−CH₂−I and I−C(CH₃)₃
(b) H₃C−CH₂−CH₂−OH and I−C(CH₃)₃
(c) H₃C−CH₂−CH₂−I and HO−C(CH₃)₃
(d) H₃C−CH₂−CH₂−OH and HO−C(CH₃)₃

Answer : A

Question. The heating of phenyl methyl ether with HI produces
(a) iodobenzene
(b) phenol
(c) benzene
(d) ethyl chloride.

Answer : B

Question. Among the following sets of reactants which one produces anisole?
(a) CH₃CHO ; RMgX
(b) C₆H₅OH ; NaOH ; CH₃I
(c) C₆H₅OH ; neutral FeCl₃
(d) C₆H₅CH₃ ; CH₃COCl ; AlCl₃

Answer : B

Question. The major organic product in the reaction is CH₃ – O – CH(CH₃)₂ + HI products
(a) CH₃I + (CH₃)₂CHOH
(b) CH₃OH + (CH₃)₂CHI
(c) ICH₂OCH(CH₃)₂
(d) CH₂OC(CH₃)₂

Answer : A

Question. Ethyl chloride is converted into diethyl ether by
(a) Perkins reaction
(b) Grignard reaction
(c) Wurtz synthesis
(d) Williamson’s synthesis.

Answer : D

Question. Which one of the following compounds is resistant to nucleophilic attack by hydroxyl ions?
(a) Diethyl ether
(b) Acetonitrile
(c) Acetamide
(d) Methyl acetate

Answer : A

Question. The compound which does not react with sodium is
(a) CH₃COOH
(b) CH₃CHOHCH₃
(c) C₂H₅OH
(d) CH₃OCH₃

Answer : D

Question. Which one is formed when sodium phenoxide is heated with ethyl iodide?
(a) Phenetole
(b) Ethyl phenyl alcohol
(c) Phenol
(d) None of these

Answer : A

Question. Intermolecular hydrogen bonding is strongest in :
(a) Methylamine
(b) Phenol
(c) Formaldehyde
(d) Methanol

Answer : D

Question. Propan-1-ol can be prepared from propene by :
(a) H₂O / H₂SO₄
(b) Hg(OAc)₂ / H₂O followed by NaBH₄
(c) B₂H₆ followed by H₂O₂
(d) CH₃CO₂H/H₂SO₄

Answer : A

Question. C₂H₅O Hand C₆H₅OHcan be distinguished by 
(a) Br₂ + H₂O
(b) FeCI₃
(c) I₂ + NaOH
(d) Both (b) and (c)  

Answer : D

Question. Phenol is more acidic than alcohol because
(a) phenol is more soluble in polar solvents
(b) alcohol does not lose hydrogen atom
(c) phenoxide ion is stabilised by resonance
(d) phenoxide ion doesn’t exhibit resonance

Answer : C

Question. Picric acid is a stronger acid than acetic acid and benzoic acid. It contains 
(a) —SO₃H group
(b) two—COOH groups
(c) phenolic group
(d) three—COOH groups   

Answer : C

Question. Which of the following compound would not evolve CO₂ when treated with NaHCO₃ solution?
(a) Salicylic acid
(b) Phenol
(c) Benzoic acid
(d) 4-nitrobenzoic acid

Answer : B

Question. CH₃OC₂H₅ and (CH₃)₃ C – OCH₃ are treated with hydroiodic acid. The fragments obtained after reactions are  
(a) CH₃I + HOC₂H₅; (CH₃)₃ Cl + HOCH₃
(b) CH₃OH + C₂H₅I; (CH₃)₃ Cl + HOCH₃
(c) CH₃OH + C₂H₅I; (CH₃)₃COH + CH₃I
(d) CH₃I + HOC₂H₅; CH₃I + (CH₃)₃ COH.

Answer : D

Question. Which of the following is a primary halide?
(a) Iso-propyl iodide
(b) Secondary butyl iodide
(c) Tertiary butyl bromide
(d) Neohexyl chloride

Answer : A

Question. An organic compound X on treatment with pyridinium chlorochromate in dichloromethane gives compound Y. Compound Y reacts with I2 and alkali to form triiodomethane. The compound ‘X’ is
(a) C₂H₅OH
(b) CH₃CHO
(c) CH₃COCH₃
(d) CH₃COOH

Answer : C

Question. The formation of diethyl ether from ethanol is based on :
(a) Dehydrogenation reaction
(b) Hydrogenation reaction
(c) Dehydration reaction
(d) Heterolytic fission reaction

Answer : D

Question. Chloropicrin is obtained by the reaction of
(a) steam on carbon tetrachloride
(b) nitric acid on chlorobenzene
(c) chlorine on picric acid
(d) nitric acid on chloroform

Answer : A

Question. Ethanol can be prepared more easily by which reaction ?        
(i) CH₃CH₂Br + H₂O → CH₃CH₂OH
(ii) CH₃CH₂Br + Ag₂O (in boiling water)→ CH₃CH₂OH
(a) by (i) reaction
(b) by (ii) reaction
(c) Both reactions proceed at same rate
(d) by none

Answer : C