Food Tests Quiz

What is the first step in preparing a food sample for testing?

• Add iodine solution

• Heat in a boiling water bath

• Break up the food using a pestle and mortar

• Mix with ethanol

Which solution is used to test for the presence of glucose?

• Iodine solution

• Biuret solution

• Benedict's solution

• Ethanol

What color change indicates a positive test for starch using iodine solution?

• Clear to cloudy

• Orange-brown to blue-black

• Blue to violet

• Blue to orange

Which test is used to identify proteins in a food sample?

• Benedict's test

• Iodine test

• Biuret test

• Ethanol test

What is the positive result for the ethanol test for lipids?

• A color change from orange-brown to blue-black

• A color change from blue to orange

• A violet color appears

• A cloudy emulsion forms

What is a hazard associated with Biuret solution?

• Irritant to the skin

• Contains copper (II) sulfate which is dangerous to eyes

• Corrosive to metals

• Highly flammable

What should you do if sodium hydroxide from Biuret solution gets on your skin?

• Seek medical attention

• Use a fire extinguisher

• Wash your hands immediately

• Apply a bandage

What is the purpose of using a boiling water bath in the Benedict's test?

• To cool the sample

• To heat the sample for a color change

• To dissolve the food sample

• To filter the solution

Which of the following is NOT a step in the CORMS evaluation?

• Controlling the volume of testing agents

• Repeating the investigation

• Using an organism

• Changing the type of food in the sample

What is the main hazard associated with ethanol in food tests?

• It is corrosive

• It is an irritant

• It is toxic

• It is highly flammable