Q.

The commonly used coolant in refrigerators is –

A. Ammonia
B. Nitrogen
C. Freon
D. Oxygen
Answer» C. Freon
Explanation: Modem refrigerators usually use a refrigerant called FIFC-134a (1,1,1,2- Tetrafluoroethane), which does not deplete the ozone layer, instead of Freon. Freon used to be the most common refrigerant till the 1980s; however, its use has declined since
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