Answer:
KBr , CH3Cl, C2H2
Explanation:
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;
C2H2 =61.2°C
CH3Cl =-192.2°C
KBr =1435°C
