Chemical Tests for Identification
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Questions and Answers

What is the purpose of the KMnO4 test described in the text?

  • To observe decolourisation of bromine water
  • To identify alcohols, ketones, aldehydes, and esters
  • To observe decolourisation of KMnO4
  • To detect carbohydrates, acids, phenols, and amines (correct)
  • What type of compound would likely show a non-sooty flame during the flame test described in the text?

  • An aromatic compound (correct)
  • An alcohol
  • A saturated compound
  • A carbohydrate
  • In the bromine water test, what inference can be made if there is no decolourisation along with the formation of a precipitate?

  • Presence of aldehydes
  • Presence of aromatic acids (correct)
  • Presence of nitro compounds
  • Presence of esters
  • Which type of compound is more likely to show decolourisation of KMnO4 according to the text?

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

    If a substance produces a sooty flame during the flame test and does not char, what type of compound could it likely be?

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

    What compounds are likely present if a substance gives off a fishy or sweet pleasant odor during testing?

    <p>Aromatic amine and phenol</p> Signup and view all the answers

    What inference can be made if a substance shows decolourisation of bromine water without any formation of a precipitate?

    <p>The presence of an unsaturated or easily oxidizable compound</p> Signup and view all the answers

    Which type of compound is likely to give a blackish color during the preliminary test observation?

    <p>Carbohydrate, acid, phenol, or amine</p> Signup and view all the answers

    What type of compound is likely to produce a pink color during the preliminary test observation?

    <p>P-Toluidine, resorcinol</p> Signup and view all the answers

    If a substance gives off a moth balls-like smell during testing, what compounds may be present?

    <p>Phenol, cresol</p> Signup and view all the answers

    When a substance produces a non-sooty flame during the flame test but does not char, what type of compound is it likely to be?

    <p>Saturated compound</p> Signup and view all the answers

    Which compounds are indicated by the presence of a buff or reddish color during the preliminary test observation?

    <p>$a$-Naphthol, B-Naphthol</p> Signup and view all the answers

    If a substance shows no decolourisation in the KMnO4 test described in the text, what type of compound could be present?

    <p>$m$-Dinitrobenzene, p-Nitro toluene, nitro phenol, nitro aniline</p> Signup and view all the answers

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