Question

Which gas was traditionally used in refrigerators?

Hint:

This gas was later linked to damage of the ozone layer and has since been phased out.

Answer 1

Step 1: The correct answer is Freon, a group of chlorofluorocarbon (CFC) gases.
Step 2: Freon was widely used as a refrigerant because it could absorb and release heat efficiently while being non-flammable.
Step 3: Scientists later found that CFCs like Freon damage the ozone layer when they leak into the atmosphere.
Step 4: Because of this, refrigerators today have moved to safer alternatives such as HFCs and HFOs, which cause far less harm to the ozone layer.