The gas used in a refrigerator to cool water is___________?
A. Nitrogen
B. Carbon dioxide
C. Methane
D. Tetrafluoroethane
Tetrafluoroethane: It is one of the commonly used refrigerant gases which you can find in almost all the present time refrigerators. This gas is condensed effectively so that it can cool down the surroundings of the machine without causing the problem of ozone depletion.