Question

I know the answer is E, but I am confused why III is accurate. If attraction increase proportionally to distance, wouldnt the distance being raised to the -6 power make the attraction decrease as distance increased? Can someone explain this for me?

25. Which of the following statements is true of Van der Waals interactions? I. They are a type of non-covalent interaction II They contribute to protein stability in hydrophobic molecules. 111. The attractive force (V) of Van der Waals forces follows V ? r-6, with r being the dipole length. A. Ionly. B. I and Il only C. I and III only D. Il and II only E. , II, and III

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Answer #1

In general, any type of attractive force (culombic or Van der waal) is inversely proportional to distance. Here, the attractive Van der Waal force is inversely proportional to r6 . Thus, attractive Van der Waal force between two molecules always decrease as distance is increased.

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