Among the following refrigerants, which is having the lowest boiling point?

Among the following refrigerants, which is having the lowest boiling point? Correct Answer Carbon dioxide

Boiling point temperature is a crucial property to carry out refrigeration. Among the given refrigerants, Carbon dioxide is having the lowest boiling point, valued at –73.6°C. Ammonia, R -12 and Sulphur dioxide are having boiling points as -33.3°C, -29°C and -10°C respectively.
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