Food Tests Quiz

What is the purpose of adding distilled water to DCPIP solution?

• To speed up the reaction between DCPIP and vitamin C.

• To ensure that the colour change in the DCPIP solution is due to vitamin C instead of water.

• To enhance the colour change in the DCPIP solution.

• To prevent the DCPIP solution from changing color.

What food substance is tested using the Grease spot test?

• Starch

• Glucose

• Proteins

• Lipids

Which food substance is indicated by a brick-red precipitate in the Benedict's test?

• Proteins

• Reducing sugars

• Starch

• Vitamin C

What does the DCPIP solution indicate in the test for Vitamin C?

• Appears yellow

• Turns blue-black

• Formation of a brown precipitate

• Decolourization

In the Iodine test, what color change indicates the presence of starch?

• Green

• Yellow

• Brown

• Blue-black

What is the positive result for the test of proteins using protein test strips?

• Test end appears yellow

• Test end turns brown

• Test end turns green

• Test end appears blue

What is the outcome of the Grease spot test for lipids?

• The spot disappears

• A translucent spot appears

• A brown precipitate forms

• The solution turns blue-black

Which food substance is tested using glucose test strips?

• Glucose

• Proteins

• Starch

• Lipids

What is the result of the Iodine test for a sample that contains starch?

• Yellow

• Brown

• Blue-black

• Green

What conclusion can be drawn from the results of the various food tests on a drink?

• The drink contains vitamin C, starch, and reducing sugars.

• The drink contains vitamin C and reducing sugars.

• The drink contains proteins and starch.

• The drink contains vitamin C and proteins.