Organic Chemistry Alcohols Quiz
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Questions and Answers

Which statement accurately describes the difference between alcohols and phenols?

  • Alcohols lack a carbon backbone, while phenols have one.
  • Alcohols contain hydroxyl groups attached to alkyl groups, whereas phenols have hydroxyl groups attached to aromatic rings. (correct)
  • The -OH group in alcohols is attached to an aromatic ring, while in phenols it is attached to an alkyl group.
  • Phenols cannot be classified as primary, secondary, or tertiary, while alcohols can.

    • Which of the following compounds is classified as a secondary alcohol?

  • CH₃CH₂OH
  • CH₃CHOHCH₃ (correct)
  • C₆H₅CH₂OH
  • HOCH₂CH₂OH

    • What characterizes a benzylic alcohol?

  • The -OH group is directly bonded to a benzene ring.
  • The -OH group is attached to a carbon adjacent to an alkene.
  • The -OH group is part of a cyclic structure.
  • The -OH group is attached to a carbon next to a carbon that is part of a benzene ring. (correct)

    • Which type of alcohol contains more than two -OH groups?

    <p>Polyhydric Alcohol</p> Signup and view all the answers

    Which of the following is an example of a vinylic alcohol?

    <p>CH₂=CHOH</p> Signup and view all the answers

    Which method of preparation produces a tertiary alcohol when reacting with a ketone?

    <p>Grignard reagent reaction</p> Signup and view all the answers

    What is the expected product when an alkene undergoes hydroboration-oxidation?

    <p>Secondary alcohol in an anti-Markovnikov manner</p> Signup and view all the answers

    Which of the following reagents can reduce an aldehyde to a primary alcohol?

    <p>Sodium borohydride</p> Signup and view all the answers

    Which of the following correctly describes the outcome of the reaction between a Grignard reagent and formaldehyde?

    <p>Produces a primary alcohol</p> Signup and view all the answers

    In the reduction of ketones using lithium aluminum hydride, what type of alcohol is formed?

    <p>Secondary alcohol</p> Signup and view all the answers

    What is the correct IUPAC name for vinyl alcohol?

    <p>Ethen-1-ol</p> Signup and view all the answers

    Which of the following alcohols is a trihydric alcohol?

    <p>Glycerol</p> Signup and view all the answers

    What distinguishes tert-butyl alcohol from other butyl alcohols?

    <p>It has a branched structure.</p> Signup and view all the answers

    Which structural formula corresponds to 2,2-Dimethylpropan-1-ol?

    <p>$CH_3-C(CH_3)_2-CH_2-OH$</p> Signup and view all the answers

    What is the IUPAC name for the alcohol with the structural formula $CH_3-CH(OH)-CH(CH_3)-CH_3$?

    <p>3-Methylbutan-2-ol</p> Signup and view all the answers

    Which of the following statements correctly describes the bond characteristics of phenol compared to methanol?

    <p>The C-O bond length in phenol is shorter than in methanol.</p> Signup and view all the answers

    What is the correct classification for pyrogallol based on its structure?

    <p>Trihydric phenol</p> Signup and view all the answers

    Which of the following methyl phenols is known as o-Cresol?

    <p>2-Methylphenol</p> Signup and view all the answers

    Which structural feature distinguishes the bond angles in phenol from those in alcohols like methanol?

    <p>Higher sp2 hybridization in the carbon adjacent to oxygen in phenol.</p> Signup and view all the answers

    Which of the following statements best describes the polarity of the O-H and C-O bonds in phenols?

    <p>Both bonds are polar because of oxygen's electronegativity.</p> Signup and view all the answers

    What primarily contributes to the higher boiling points of alcohols compared to alkanes?

    <p>Formation of hydrogen bonds</p> Signup and view all the answers

    Which factor is responsible for the decreasing solubility of alcohols in water as molecular mass increases?

    <p>Increasing prevalence of non-polar alkyl groups</p> Signup and view all the answers

    Which statement correctly describes the relationship between alcohol structure and boiling points?

    <p>Primary alcohols consistently exhibit the highest boiling points</p> Signup and view all the answers

    What effect do electron donating groups have on the acidity of alcohols?

    <p>Reduce the polarity of the O-H bond</p> Signup and view all the answers

    How does branching in an alcohol chain affect its solubility in water?

    <p>It increases solubility by reducing non-polar surface area</p> Signup and view all the answers

    What is the product of the reaction between ethyl alcohol and hydrogen halide?

    <p>Ethyl chloride</p> Signup and view all the answers

    Which reaction type involves converting an alcohol and a carboxylic acid into an ester and water?

    <p>Esterification</p> Signup and view all the answers

    What is the correct order of reactivity for alcohols undergoing cleavage of the C–O bond?

    <p>3° alcohol &gt; 2° alcohol &gt; 1° alcohol</p> Signup and view all the answers

    In the dehydration of isopropyl alcohol, what is the main product formed?

    <p>Propene</p> Signup and view all the answers

    What is the result of the reaction of alcohol with thionyl chloride?

    <p>Alkyl chloride and sulfur dioxide</p> Signup and view all the answers

    What is the final product of a 1° alcohol after complete oxidation?

    <p>Carboxylic acid</p> Signup and view all the answers

    Which alcohol does not undergo oxidation under normal conditions?

    <p>3° alcohol</p> Signup and view all the answers

    Which reagent is required for the dehydrogenation of a 2° alcohol to a ketone?

    <p>Cu at 573 K</p> Signup and view all the answers

    What is expected as a product when tertiary alcohols are dehydrated?

    <p>Alkene</p> Signup and view all the answers

    In the oxidation of a 2° alcohol, which step occurs first?

    <p>Formation of ketone</p> Signup and view all the answers

    What is the primary reaction condition for producing phenol from chlorobenzene?

    <p>623 K, 320 atm</p> Signup and view all the answers

    Which mechanism explains the increased acidity of phenols in the presence of electron-withdrawing groups?

    <p>Enhanced delocalization of the negative charge at ortho and para positions</p> Signup and view all the answers

    What is the byproduct formed when cumene undergoes oxidation to produce phenol?

    <p>Cumene hydroperoxide</p> Signup and view all the answers

    What effect do electron-donating groups have on the acidity of phenol?

    <p>Decrease acidity by blocking the formation of the phenoxide ion</p> Signup and view all the answers

    What is produced when aniline is treated with sodium nitrite and hydrochloric acid?

    <p>Benzene diazonium chloride</p> Signup and view all the answers

    Which product results from the acetylation reaction of phenol?

    <p>Phenyl acetate</p> Signup and view all the answers

    What reagent is used in the nitration of aniline to form o-nitrophenol?

    <p>dil. HNO3</p> Signup and view all the answers

    During the bromination of phenol, what is the major product formed?

    <p>p-bromophenol</p> Signup and view all the answers

    What is the primary reagent needed to convert phenyl benzoate into aniline?

    <p>Zn, NH3</p> Signup and view all the answers

    What combination of reagents and conditions leads to the formation of p-nitrophenol from aniline?

    <p>conc. HNO3 and conc. H2SO4</p> Signup and view all the answers

    Which product is formed from the oxidation of 2,4,6-Tribromophenol?

    <p>Benzoquinone</p> Signup and view all the answers

    Which reaction condition is specifically used for the bromination of phenol?

    <p>Br2 in CS2 at 273 K</p> Signup and view all the answers

    What are the reactants in the benzoylation reaction involving phenol?

    <p>Phenol and C6H5COCl</p> Signup and view all the answers

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