$(i)$ Write the full form of $(a)$ $LPG$ $(b)$ $CNG$.
$(ii)$ Give one use of each.

$(a)$ Enumerate the changes that take place in a liquid during evaporation.
$(b)$ How is the rate of evaporation affected by changes in the following? Justify your answer.
$(i)$ Temperature
$(ii)$ Wind speed
$(iii)$ Humidity

The property to flow is unique to fluids. Which one of the following statements is correct?

Comment on the following statements :
$(a)$ Evaporation produces cooling.
$(b)$ Rate of evaporation of an aqueous solution decreases with increase in humidity.
$(c)$ Sponge though compressible is a solid.

Account for the following:
$(a)$ When sugar crystals dissolve in water,the level of water does not rise appreciably.
$(b)$ Doctors advise to put strips of wet cloth on the forehead of a person having high fever.
$(c)$ Naphthalene balls disappear with time without leaving any solid residue.
$(d)$ $A$ wooden table should be called a solid.
$(e)$ Dogs generally hang out their tongue in summer.

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