I mix solute in solvent,why elevation in boiling point?

@ adil 
its a simple concept , when u are mixing solute particle with solvent , then solute particle will take space somewhere within the solvent particle , so, there will be more force required to break them apart and to boil the solvent , 
so, due to that more force we have elevation in boiling point , and remember its a colligative property . and its going to depend upon the no of solute particle . 
HOPE IT CLEARS NOW