Carbohydrate Tests Quiz

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Questions and Answers

What is the Molisch Test based on?

  • The reaction of a carbohydrate with sulfuric acid
  • The reaction of a carbohydrate with Barfoed's reagent
  • The reaction of a carbohydrate with Benedict's reagent
  • The reaction of a carbohydrate with Molisch reagent (correct)

What is the expected color of the product in the Molisch Test?

  • Purple (correct)
  • Yellow
  • Green
  • Blue

What is the procedure for the Molisch Test?

  • Add 3 drops of Molisch reagent to 5 ml. of the solution to be tested, then add 40 drops of concentrated sulfuric acid by slowly dripping it down the side of the test tube) Do NOT mix the solutions. Observe for evidence of a reaction over the next 15-20 minutes. (correct)
  • Add 3 drops of Barfoed's reagent to 5 ml. of the solution to be tested and observe for 15-20 minutes
  • Add 3 drops of Benedict's reagent to 5 ml. of the solution to be tested and observe for 15-20 minutes
  • Add 3 drops of Fehling's reagent to 5 ml. of the solution to be tested and observe for 15-20 minutes

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