Question

The melting point of ice on Kelvin scale is:
A. 0 K
B. -273 K
C. 273 K
D. 373 K

Answer 1

Hint: It should be known that conversion of Centigrade (Celsius) scale to a Kelvin scale could be done through the following formulation:
\[K=273+C\]

Complete answer:
First of all, it is important to understand what a Melting point is and how that is different from other terms which is Boiling Point (which is illustrated in the note). Melting point is a temperature at which a solid will melt.
1. We also know that Melting point is also termed as Freezing point, theoretically.
2. Ice is the solid form of our common water. We know typically, the water can exist in three states or as a matter of fact, any substance could typically or should say essentially could exist in three different states of matter which are solid, liquid and gaseous states.
3. We know that our common water is in the form of ice at 0 degree Celsius and becomes boiling water when the temperature is 100 deg Celsius.
4. The difference is that of the scale. Now we should know that there are multiple ways a temperature value could be expressed. Some of these temperature scales apart from Celsius scale are Kelvin and Fahrenheit.
5. The typical conversion pertaining to this question demands us to give the answer in the Kelvin scale. It should be noted that 0 Degree Celsius is equal to 273 K and subsequently, 100 Degree Celsius is equal to 373 K. Although approximate, this value helps us in getting the option answer.

Hence, through this conversion, we know that Ice (Solid state of water) melting point is 273 Kelvin or simply 273 K, which is Option C.

Note: It should be noted that apart from Melting point or Freezing point, there is another terminology which is Boiling point. Boiling point is the temperature at which the pressure exerted by the surrounding upon a liquid material is equal to the pressure exerted by the vapour of the liquid. Such pressure is also termed as Vapour Pressure. The boiling point of water is 100 degree Celsius or 373 K. For Fahrenheit scale, the typical conversion that is used is: $$ $\frac{C}{5}=\frac{F-32}{9}$