During summer,water kept in an earthen pot becomes cool because of the phenomenon of

Alka was making tea in a kettle. Suddenly she felt intense heat from the puff of steam gushing out of the spout of the kettle. She wondered whether the temperature of the steam was higher than that of the water boiling in the kettle. Comment.

Fill in the blanks :
$(a)$ Evaporation of a liquid at room temperature leads to a ........... effect.
$(b)$ At room temperature,the forces of attraction between the particles of solid substances are ........... than those which exist in the gaseous state.
$(c)$ The arrangement of particles is less ordered in the ........... state. However,there is no order in the ........... state.
$(d)$ ........... is the change of solid state directly to vapour state without going through the ........... state.
$(e)$ The phenomenon of change of a liquid into the gaseous state at any temperature below its boiling point is called ...........

Rate of diffusion is faster in gases. Why?

The following triangle exhibits the interconversion of the three states of matter. Complete the triangle by labeling the arrows marked $A, B, C$ and $D$.

In which of the following conditions,the distance between the molecules of hydrogen gas would increase?
$(i)$ Increasing pressure on hydrogen contained in a closed container
$(ii)$ Some hydrogen gas leaking out of the container
$(iii)$ Increasing the volume of the container of hydrogen gas
$(iv)$ Adding more hydrogen gas to the container without increasing the volume of the container