Which of the responses includes all of the following that can form hydrogen bonds with water molecules? (1) Na (2) CH,COOH 6. (3) C2Ho (4) CH3NH Ar (1)and (2) ,W(1)and (3) C)(2) and (3) ?(2) and (4) E)(3) and (4) 7. What types of intermolecular forces exist between hydrogen fluoride molecules? I. London forces III. dipole-dipole interactions II.. hydrogen bonding IV. Ion-dipole interactions A) II and III B) 1,11, and 111 C) l only D) ?ll only E) l and 111 8. Which of the following statements is true? A C) D) The higher the viscosity, the faster a liquid flows The viscosity increases with increasing temperature. Liquids having strong intermolecular forces have higher viscosities than those that have weaker intermolecular forces. Water has a low viscosity because of hydrogen bonding. Solution 6. D ( ch3cooh and ch3nh2) 7. A (HYDROGEN BOND AND DIPOLE -DIPOLE) 8. C and D As a gas is heated, the movement of gas molecules increases and the probability that one gas molecule will collide with another gas molecule increases.  In other words, increasing gas temperature causes the gas molecules to collide more often. This increases the gas viscosity because the transfer of momentum between stationary and moving molecules is what causes gas viscosity. As a liquid is heated, the viscosity decreases ... just the opposite effect as in gases.  Why?  Because liquids have much higher inter-molecular activity and attraction forces that keep the molecules closer together (i.e., that is why they are liquids).  Heating a liquid increases the energy level of the molecules to the point where those inter-molecular forces are weakened and therefore the resistance to flow through the liquid (i.e., the liquid viscosity) decreases. .