A) Jet air crafts
B) refrigerators
C) Fire extinguishers
D) all of these
Correct Answer: D
Solution :
[d] chlorofluoro carbons are non-toxic, colourless, odourless, inert chemicals which persist in the atmosphere for long duration. It is used in jet air crafts, refrigerators, fire extinguishers air-conditions, and foam blowing spray.
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