Chloro-methane or Chloroform exist as a dense liquid, acetylene as a gas used for welding purpose and potassium bromide is a crystalline solid, the states of matter of each of them gives us a clue of how strong the bonds between them are , acetylene having the weakest bond as its a gas and KBr having the strongest bond for its crystalline solid state. The boiling point of each compound is given below;
