Carbohydrate Analysis Quiz

Which carbohydrate is insoluble in water?

• Sucrose

• Starch

• Glucose

• Fructose

What is the visual indicator of the presence of carbohydrates in the Mishes test?

• Blue color

• Red precipitate

• Red violet ring

• Silver mirror

Which test involves the use of sulfuric acid to produce a red violet ring?

• Iodine test

• Mishes test

• Benedict's test

• Fehling's test

In the Fehling's test, which carbohydrate shows a positive result by forming a red precipitate?

• Glucose

• Cellulose

• Sucrose

• Starch

In the Fehling's test, what is the initial color of the solution before heating?

• Yellow

• Green

• Blue

• Red

What color change indicates a positive Benedict's test for reducing sugars?

• Blue to orange

• Blue to yellow

• Blue to green

• Blue to red

What is the main purpose of using a boiling water bath in these tests?

• To cool the solution

• To accelerate the reaction

• To dissolve the carbohydrate

• To change the color of the solution

Which carbohydrate does not react with Tollen's reagent to form a silver mirror?

• Glucose

• Sucrose

• Starch

• Lactose

What is the result of the iodine test for starch?

• No change

• Blue color

• Red color

• Green color

Which test is used to confirm the presence of starch?

• Iodine test

• Mishes test

• Tollen's test

• Fehling's test