Subtopic: Preservation of food by cooling and freezing
Question Statement:
Which of the following environmental and safety criteria must be met by eco-friendly modern refrigerants replacing CFCs and HCFCs in industrial dairy and cold store plants?
Options:
(A) Zero Ozone Depletion Potential ($ODP = 0$)
(B) Ultra-low Global Warming Potential ($GWP < 150$)
(C) Use of natural refrigerants such as ammonia ($R717$), carbon dioxide ($R744$), and propane ($R290$)
(D) Permanent atmospheric lifetime exceeding 1000 years
Answer Key:
A, B, C
Step-by-Step Solution & Explanation
Modern refrigerant selection under the Kigali Amendment mandates zero ODP (A), low GWP (B), and promotes natural refrigerants (C). Long atmospheric lifetimes (D) are detrimental greenhouse gas properties that regulations aim to eliminate.