Question

is used to preserve the freshness of packaged foods - a. argon . b. oxygen c. nitrogen. d. none of this​

Answer 1

Answer:

c. Nitrogen packing

Explanation:

Nitrogen packing requires the use of high concentrations of gaseous nitrogen within food packaging. Nitrogen at 99.0% concentration is usually recommended for food preservation. Other chemical conditions that contribute to effective nitrogen packaging are: Oxygen concentration should be maintained under 1%