Question

What are the lower and upper fixing points in Celsius and Fahrenheit scales?

Answer 1

Lower fixing point is the temperature of pure melting ice at normal atmospheric pressure. It is equal to $0^{\circ }$, which is equivalent to $(0+273)K=273K$

Upper fixing point is the temperature of pure boiling water at normal atmospheric pressure.It is equal to ${100}^{\circ }$, which is equivalent to $(100+273)K=373K$