Chemistry: Azo Dyes and Two-Photon Photodynamic Therapy

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Questions and Answers

What is the toxic effect of Azo dyes a reason for?

  • Increasing use of Azo dyes in the pharmaceutical industry
  • Decreasing use of Azo dyes in the pharmaceutical industry (correct)
  • Using Azo dyes for the treatment of insomnia
  • Applying Azo dyes in thermal transfer printers

Which functional group does Benzoic Acid possess?

  • Carboxylic acid group (correct)
  • Amine group
  • Aldehyde group
  • Alcohol group

What is the primary source from which the name 'Benzoic Acid' is derived?

  • Gum benzoin (correct)
  • Salkowski
  • Castoreum
  • Nostradamus

Who discovered the antifungal abilities of Benzoic Acid?

<p>Salkowski (A)</p> Signup and view all the answers

In which industry are Azo dyes widely used for dyeing purposes?

<p>Textile industry (A)</p> Signup and view all the answers

Which application does NOT involve the use of Azo dyes?

<p>Calibrating a bomb calorimeter (B)</p> Signup and view all the answers

How is benzoic acid part of Whitfield's ointment for fungal infections?

<p>As a constituent (D)</p> Signup and view all the answers

Which metal can catalyze the partial oxidation process of toluene to produce benzoic acid industrially?

<p>Cobalt (C)</p> Signup and view all the answers

How can benzoic acid be prepared from benzyl chloride?

<p>Oxidation in the presence of alkaline KmnO4 (C)</p> Signup and view all the answers

What reaction produces equal amounts of benzoate and benzyl alcohol?

<p>Cannizzaro reaction (D)</p> Signup and view all the answers

What is the most common application of benzoic acid in industrial settings?

<p>Food preservative (A)</p> Signup and view all the answers

Which compound can increase in human urine when exposed to Toluene or Benzoic Acid?

<p>Hippuric acid (A)</p> Signup and view all the answers

What is the physical state of Para Red dye?

<p>Solid (A)</p> Signup and view all the answers

Who discovered Para Red dye?

<p>Von Gallois and Ullrich (C)</p> Signup and view all the answers

Why is Diazonium salt kept in an ice bath during the conversion process to para red dye?

<p>To prevent decomposition (B)</p> Signup and view all the answers

Which group is removed in the second step of para red dye synthesis?

<p>Ketone group (B)</p> Signup and view all the answers

What does the theoretical yield of Nitroacetanilide involve the addition of?

<p>Nitric Acid (D)</p> Signup and view all the answers

What is the classification criteria for Azo dyes?

<p>The number of azo groups present in the structure (C)</p> Signup and view all the answers

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