What is the physical state of water at:
(A).250$^{0}C$
(B).100$^{0}C$

Hint:To solve this question, first we have to understand what it means by the term physical state. Physical state means the condition in which the matter exists under a specific condition and in this question the temperature is mentioned.

Complete answer:
We know that the boiling point of water is 100 degree centigrade and after that water exists in gaseous states. It means that at 250$^{0}C$ water will exist in a gaseous state as water changes into vapours and boiling occurs.
And the physical state of water at 100 degree centigrade is both liquid state as well as gaseous state. We know that the boiling point of water is 100 degree centigrade and after that water exists in gaseous states.
Hence, the physical state of water at 250 $^{0}C$ is gaseous and at 100$^{0}C$ is both gaseous and liquid.

Additional information:
It is difficult to heat any solid above its melting point because the heat which enters the solid after its melting point is used to convert the solid into the liquid state. It is however possible to cool some liquid below its freezing point without forming a solid. When this is done the liquid is known as supercooled liquid.

Note:
The temperature can be converted into Kelvin scale, by adding 273 to it. Zero degree Celsius is equal to 273 Kelvin. The change of the state from the solid to liquid occurs due to the presence of the hyperactive atoms.