At what temperature does solid ice and liquid water co-exist together (in $0^{\circ} C$)?

Distinguish between solids,liquids,and gases in tabular form under the following characteristics:
$(a)$ Interparticle force of attraction
$(b)$ Diffusion
$(c)$ Fluidity.

Give reasons for the following:
$(i)$ $A$ liquid generally flows easily.
$(ii)$ Ice at $0^{\circ} C$ appears colder to the mouth than water at $0^{\circ} C$. Why?
$(iii)$ Doctors advise putting strips of wet cloth on the forehead of a person having a high temperature.

Why does perspiration keep our body cool?

How does the melting point of a substance indicate the strength of its intermolecular forces of attraction?

$(a)$ What temperature in Kelvin scale is equal to $50^{\circ} C$?
$(b)$ Describe an activity to show that the rate of evaporation increases with surface area.