Chromatography lab Exam Questions and Answers 100% Pass

Chromatography lab Exam Questions and
Answers 100% Pass


What were food color additives initially used for? -

[ANSWER]: To make food more visually appealing to the consumer

and mask poor quality.




QUESTION: Why were almost all of the original food color additives

phased out? -

[ANSWER]: Most were not safe for consumption and were being

added to foods with no health testing.




QUESTION: What could have been done to determine whether a color

additive was harmful before it was used in the food industry? -

[ANSWER]: They could have used chromatography to determine the

purity of each additive.

, QUESTION: Of the original 695 color additives how many are still used

today? -

[ANSWER]: 2




QUESTION: How many color additives total are used today? -

[ANSWER]: 7




QUESTION: What do all approved food dyes share in common? -

[ANSWER]: They are charged, water-soluble organic compounds that

bind to natural ionic and polar sites in large food molecules.




QUESTION: What is the difference between absorption and adsorption

-

[ANSWER]: Absorption is a physical and chemical event occurring

during contact between materials that have an attraction for each other.

Adsorption is different from absorption in that the molecules of the