Group 6 Quiz

Which of the following tests is used to detect the presence of reducing sugars?

• Benedict's test

• Fehling's test

• Nylander's test

• All of the above

What color precipitate is formed when Benedict's reagent is heated with a reducing sugar?

• Reddish brown to red

• Green

• Blue

• Black

What principle is behind Fehling's test?

• Reducing sugars reduce copper (II) ions to copper (I) ions.

• Reducing sugars react with bismuth ions to form bismuth (III) oxide.

• Monosaccharides are dehydrated by concentrated acids at boiling temperatures to form furfural or hydroxymethyl furfural.

• Carbohydrates react with anthrone in concentrated sulfuric acid to form a blue or green color.

What is the name of the crystalline compound that is formed when a sugar is converted to an osazone?

• Osazone

• Furfural

• Hydroxymethyl furfural

• Caramel

What color does a solution of a reducing sugar turn when heated with Moore's test reagent?

• Yellow, orange, and then dark brown

• Blue or green

• Violet

• Red

What is the name of the test that uses anthrone to detect carbohydrates?

• Anthrone test

• ) Bial's test

• Tollens' test

• Tauber's test

What is the name of the test that uses alpha-naphthol and concentrated sulfuric acid to detect carbohydrates?

• Molisch's test

• Selivanoff's test

• Barfoed's test

• Bial's test

What is the name of the test that uses resorcinol and hydrochloric acid to detect ketoses?

• Selivanoff's test

• Barfoed's test

• Bial's test

• Tollens' test

What is the name of the test that uses phloroglucinol to detect galactose?

• Tollens' test

• Tauber's test

• Bial's test

• All of the above

What is the name of the test that uses phloroglucinol to detect galactose?

• Tollens' test

• Tauber's test

• Bial's test

• All of the above