i need some ideas for some working models related to chemistry.

 What are intermolecular space? how are these related to the 3 states of matter?

please give me some examples from daily life where evaporation causes cooling effect

Explain how a karate player can break a pile of tiles in a single blow of his hand

a sample water under study was found to boil at 102 degree celsius at normal pressure. is the water pure and can it freeze at 0 degree celsius?

when sugar is dissolved in water there is no increase in the volume. which characteristic of matter is illustrated by this observation //?

 what are properties of cathode rays

Why is solid carbon dioxide known as dry ice??

 What is rhe difference between cathode rays and anode rays???

 name the characteristics of matter that are demonstrated by diffusion

why does water have higher boiling point than alcohol ? at what temp. in kelvin, it can be changed into soild state and into vapours?

give me a scientific reason----sugar and salt kept in different jars gain their shape...why?

small quantity of chlorine fills the whole vessel in which it is enclosed

name a common substance which exists in all the three states of matter.

The smell of hot food reaches us from several meters but not of cold food. Why?

give a reason that why on heating a substance at its melting point the interparticle space increases?