Alcohol, Phenol and Ether
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Questions and Answers

What is the primary purpose of using phenol in the manufacture of nylon and artificial tannins?

  • As a catalyst to facilitate polymerization
  • As a precursor to develop the necessary functional groups (correct)
  • As a starting material for the production of polyamide
  • As a solvent to dissolve the reactants

    • Which reaction involves the formation of a complex compound, resulting in a violet colouration?

  • Reaction with ferric chloride (correct)
  • Elbs persulphate oxidation
  • Condensation with phthalic anhydride
  • Liebermann's nitroso reaction

    • What is the product formed when phenol reacts with phthalic anhydride in the presence of concentrated sulphuric acid?

  • Aspirin
  • Phenolphthalein (correct)
  • Salol
  • Phenacetin

    • What is the purpose of using phenol in the preparation of disinfectants, fungicides, and bactericides?

    <p>As an active ingredient providing antimicrobial properties</p> Signup and view all the answers

    What is the characteristic odour associated with phenol?

    <p>Typical phenolic</p> Signup and view all the answers

    What is the product of the condensation reaction between phenol and CH2O?

    <p>Bakelite resin</p> Signup and view all the answers

    What is the colour of the solution when phenol is reacted with NaNO2 and concentrated H2SO4, and then diluted with water?

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

    Which of the following is a derivative of phenol used as an antiseptic?

    <p>2, 4-dichloro-3, 5-dimethyl phenol</p> Signup and view all the answers

    What is the application of phenol in the production of nylon?

    <p>In the manufacture of cyclohexanol</p> Signup and view all the answers

    What is the product of the reaction between phenol and NaNO2 in the presence of concentrated H2SO4?

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

    What is the reason for the higher boiling points and solubility in water of phenols?

    <p>The strong intermolecular hydrogen bonding and high dipole moment</p> Signup and view all the answers

    What is the characteristic of phenol that distinguishes it from hydrocarbons of comparable molecular weights?

    <p>Higher melting points and boiling points</p> Signup and view all the answers

    What is the reason for the violet colouration of phenol with ferric chloride solution?

    <p>The formation of a coloured iron complex</p> Signup and view all the answers

    What is the effect of the position of the substituent on the strength of phenol as an acid?

    <p>The strength of phenol as an acid is higher when the substituent is in the o- or p-position</p> Signup and view all the answers

    What is the reaction of phenol with strong alkalies?

    <p>It forms phenoxides</p> Signup and view all the answers

    What is the reason for the acidity of phenol?

    <p>Due to the formation of a stable phenoxide ion</p> Signup and view all the answers

    What is the product formed when phenol reacts with alkyl halides in alkali solution?

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

    Why are phenols more acidic than alcohols?

    <p>Due to the delocalisation of the negative charge in the benzene ring</p> Signup and view all the answers

    What is the effect of electron-attracting groups on the acidity of phenol?

    <p>They increase the acidity of phenol</p> Signup and view all the answers

    Why is the phenoxide ion stable?

    <p>Due to the delocalisation of the negative charge</p> Signup and view all the answers

    What is the product formed when a carboxylic acid is reduced with LiAlH4?

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

    What is the name of the reduction reaction where aluminium isopropoxide is used as the reducing agent?

    <p>Meerwein-Ponndorf-Verley reduction</p> Signup and view all the answers

    What is the product formed when an ester undergoes alkaline hydrolysis?

    <p>An acid and an alcohol</p> Signup and view all the answers

    What is the characteristic of alcohols that distinguishes them from hydrocarbons of comparable molecular weights?

    <p>Higher boiling points and solubility in water</p> Signup and view all the answers

    What is the effect of hydrogen bonding on the physical properties of alcohols?

    <p>Increases boiling points and solubility in water</p> Signup and view all the answers

    Why do phenols have high boiling points?

    <p>Due to their ability to form hydrogen bonds with water</p> Signup and view all the answers

    What is the effect of the position of a substituent on the strength of phenol as an acid?

    <p>The strength of phenol as an acid increases when the substituent is in the o- or p-position</p> Signup and view all the answers

    What is the product formed when phenol reacts with sodium hydroxide?

    <p>Sodium phenoxide and water</p> Signup and view all the answers

    Why is phenol sparingly soluble in water but readily soluble in organic solvents?

    <p>Due to its high dipole moment and intermolecular H-bonding</p> Signup and view all the answers

    What is the characteristic of phenol that distinguishes it from hydrocarbons of comparable molecular weights?

    <p>Higher dipole moment and intermolecular H-bonding</p> Signup and view all the answers

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