Question

When water is added to ethylene glycol, the viscosity of the solution decreases when compared to pure ethylene glycol. Which of the following is the BEST explanation of why this occurs? Ethylene glycol is thick and water is thin, so when mixed together it makes a medium thick solution The water molecules increase the intermolecular interactions between the ethylene glycol molecules, which allow them interact with other molecules, the resulting solution less viscous. The water molecules increase the intermolecular interactions between the ethvlene glycol molecules, which allow them interact with other molecules, the resulting solution more viscous. The water molecules disrupt the intermolecular interactions between the ethylene glycol molecules, which allow them to flow past each other more ea making the resulting solution less viscous.

Answer 1

option (iv) is correct.

i.e. the water molecules disrupt the intermolecular interactions between the ethylene glycol molecules which allow them to flow past each other making the resulting solution less viscous.