Alcohols, Phenols & Ethers MCQ's.

Alcohols, Phenols and Ethers

Multiple Choice Questions

  

 

1. 3-pentanol is a:
   1.   Primary alcohol
   2.   Secondary alcohol
   3.   Tertiary alcohol
   4.   None of the above
2. Anisole can be prepared by the action of methyl iodide on sodium phenate. The reaction is called:
   1.   Fittig reaction
   2.   Etard reaction
   3.   Williamson reaction
   4.   Wurtz reaction
3. Williamson synthesis is the process in which Alkyl halide reacts with sodium alkoxide to form an ether. For this reaction the alkyl halide should be:
   1.   Primary
   2.   Secondary
   3.   Tertiary
   4.   All of the above
4. ortho-nitrophenol is steam volatile whereas para-nitrophenol is not. This is due to:
   1.   Intermolecular hydrogen bonding
   2.   Intramolecular hydrogen bonding present in ortho-nitrophenol
   3.   Intramolecular hydrogen bonding present in para-nitrophenol
   4.   None of these
5. Boiling point of alcohol is comparatively higher than that of corresponding alkane due to:
   1.   Intermolecular H-bonding
   2.   Intramelecular H-bonding
   3.   Volatile nature
   4.   None of these
6. Phenol is treated with bromine water and shaken well. The white precipitate formed during the process is:
   1.   m-bromophenol
   2.   2,4-dibromophenol
   3.   2,4,6-tribromophenol
   4.   A mixture of o- and p-bromophenols
7. Phenol, when first reacts with concentrated sulphuric acid and then with concentrated nitric acid, gives:
   1.   o-nitrophenol
   2.   p-nitrophenol
   3.   Nitrobenzene
   4.   2,4,6-trinitrophenol
8. Primary and secondary alcohols on action of reduced copper give:
   1.   Aldehydes and ketones respectively
   2.   Ketones and aldehydes respectively
   3.   Only aldehydes
   4.   Only ketones
9. Monochlorination of toluene in sunlight followed by hydrolysis with aq. NaOH yields:
   1.   o-cresol
   2.   m-cresol
   3.   2,4-Dihydroxytoluene
   4.   Benzyl alcohol
10. What is the correct order of reactivity of alcohols in the following reaction?
    R-OH + HCl --ZnCl₂--> R-Cl + H₂O
    1.   Primary > Secondary > Tertiary
    2.   Primary < Secondary > Tertiary
    3.   Tertiary > Secondary > Primary
    4.   Tertiary > Primary > Secondary
11. The C-O-C angle in ether is about
    1.   180⁰
    2.   190⁰28’
    3.   110⁰
    4.   109⁰
12. The C-O-H bond angle in alcohols is slightly less than the tetrahedral angle whereas the C-O-C bond angle in ether is slightly greater because:
    1.   of repulsion between the two bulky groups
    2.   O atom in both alcohols and ether is sp³ hybridized
    3.   lone pair-lone pair repulsion is greater than bond pair-bondpair repulsion.
    4.   None of the above
13. The process of converting alkyl halides into alcohols involves:
    1.   Addition Reaction
    2.   Substitution Reaction
    3.   Dehydrohalogenation Reaction
    4.   Rearrangement Reaction
14. CH₃CH₂OH can be converted into CH₃CHO by:
    1.   Catalytic hydrogenation
    2.   Treatment with LiAlH₄
    3.   Treatment with pyridinium chlorochromate
    4.   Treatment with KMnO₄
15. Which of the following species can act as the strongest base?
    1.   -OH
    2.   -OR
    3.   -OC₆H₅
    4.   -OC₆H₅NO₂
16. Which of the following is most acidic?
    1.   Benzyl alcohol
    2.   Cyclohexanol
    3.   Phenol
    4.   m-chlorophenol
17. IUPAC name of the compound CH₃CH(CH₃)OCH₃
    1.   1-methoxy-1-methylethane
    2.   2-methoxy-2-methylethane
    3.   2-methoxypropane
    4.   Isopropylmethyl ether
18. An alkene CH₃CH=CH₂ is treated with B₂H₆ in presence of H₂O₂. The final product is:
    1.   CH₃CH₂CHO
    2.   CH₃CH(OH)CH₃
    3.   (CH₃CH₂CH₂)₃B
    4.   CH₃CH₂CH₂OH
19. Which reducing agent is used for the following conversion?
    RCOOH ----> RCH2OH
    
    1.   LiAlH₄
    2.   NaBH₄
    3.   K₂Cr₂O₇
    4.   KMnO₄
20. Lucas reagent is:
    1.   Pd + BaSO₄
    2.   Conc. HCl + anhy. ZnCl₂
    3.   dil. HCl + anhy. ZnCl₂
    4.   None of the above
21. Lucas reagent is used to differentiate which monohydric alcohols?
    1.   Primary
    2.   Secondary
    3.   Tertiary
    4.   All of these
22. Reaction of Propanone with alkyl magnesium bromide followed by hydrolysis will produce:
    1.   primary alcohol
    2.   secondary alcohol
    3.   tertiary alcohol
    4.   carboxylic acid
23. For the reaction, C₂H₅OH + HX ---> C₂H₅X + H₂O; the order of reactivity is:
    1.   HCl > HBr > HI
    2.   HI > HBr > HCl
    3.   HBr > HCl > HI
    4.   HI > HCl > HBr
24. The major product of acid catalyzed dehydration of 2-methylcyclohexanol and butan-1-ol are respectively:
    1.   1-methylcyclohexene and but-1-ene
    2.   2-methylcyclohexene and but-2-ene
    3.   2-methylcyclohexene and butane
    4.   1-methylcyclohexene and but-2-ene
25. An alcohol X when treated with hot. conc. H₂SO₄ gave an alkene Y with formula C₄H₈. This alkene on ozonolysis gives single product with molecular formula C₂H₄O. The alcohol is
    1.   butan-1-ol
    2.   butan-2-ol
    3.   2-Methylpropan-1-ol
    4.   2,2-dimethylbutan-1-ol
26. Conversion of Phenol to salicylic acid and to salicylaldehyde is known as (respectively):
    1.   Reimer-Tiemann reaction and Kolbe’s reaction
    2.   Wlliamson’s synthesis and Hydroboration oxidation
    3.   Kolbe’s reaction and williamson’s synthesis
    4.   Kolbe’s reaction and Reimer-Tiemann reaction
27. Arrange the following compounds in increasing order of boiling point.
    Propan-1-ol, butan-1-ol, butan-2-ol, pentan-2-ol:
    1.   Propan-1-ol, butan-2-ol, butan-1-ol, pentan-1-ol
    2.   Propan-1-ol, butan-1-ol, butan-2-ol, pentan-1-ol
    3.   Pentan-1-ol, butan-2-ol, butan-1-ol, Propan-1-ol
    4.   Pentan-1-ol, butan-1-ol, butan-2-ol, Propan-1-ol
28. Ether is obtained from ethyl alcohol in presence of H₂SO₄ at.
    1.   113 K
    2.   443 K
    3.   413 K
    4.   213 K
29. The major product obtained on interaction of phenol with sodium hydroxide and carbon dioxide is:
    1.   benzoic acid
    2.   salicylaldehyde
    3.   phthalic acid
    4.   salicylic acid
30. Benzoquinone is prepared by reaction of phenol with
    1.   Na₂Cr₂O₇, H₂SO₄
    2.   KMnO₄, H₂SO₄
    3.   Na₂CrO₄, HCl
    4.   K₂MnO₄, H₂SO₄