Solution Contamination
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Questions and Answers

Which of the following can contribute to the contamination of a solution?

  • Raw materials used in the manufacture of solutions (correct)
  • The presence of bacteria in the environment
  • The use of dispersing agents
  • The introduction of microorganisms by consumers

What are some factors that may cause product contamination?

  • Raw materials and consumer use
  • Equipment and consumer use
  • Raw materials, equipment, and personnel (correct)
  • Equipment and environment

How can consumer use contribute to the contamination of a solution?

  • By introducing microorganisms (correct)
  • By contaminating the environment
  • By using dispersing agents
  • By using raw materials

Which of the following is a characteristic of ethanol as a preservative?

<p>It needs a relatively high concentration (&gt; 10%) to be effective (D)</p> Signup and view all the answers

Which of the following is true about benzoic acid and sorbic acid as preservatives?

<p>Their use is restricted to preparations with a pH below 4.5 (D)</p> Signup and view all the answers

Which of the following is true about parabens as preservatives?

<p>They are esters of p-hydroxybenzoic acid (C)</p> Signup and view all the answers

Which of the following can initiate the oxidation reaction of vitamins, essential oils, and fats and oils?

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

How can the effect of trace metals, such as Fe and Cu, be minimized in the oxidation process?

<p>Using citric acid or EDTA (A)</p> Signup and view all the answers

Which of the following can be used as antioxidants in the oxidation process?

<p>Propyl esters of gallic acid (B)</p> Signup and view all the answers

Which of the following is a method used to prepare solutions of this type?

<p>Dissolving the solute in a suitable solvent by stirring or heating (B)</p> Signup and view all the answers

What is the purpose of adding other ingredients to the solvent in these solutions?

<p>To stabilize the active ingredient (D)</p> Signup and view all the answers

How are plant or animal products typically prepared in this context?

<p>By suitable extraction process (A)</p> Signup and view all the answers

Which method is used to prepare solutions by dissolving the solute in a suitable solvent?

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

What is the purpose of adding other ingredients to the solvent in simple solutions?

<p>To solubilize the active ingredient (B)</p> Signup and view all the answers

Which solute-solvent combination results in the formation of more soluble polyiodides?

<p>Iodine in presence of KI (B)</p> Signup and view all the answers

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