Question

Substances X and Y are both nonpolar. If the volatility of X is higher than that of Y, what is the best explanation?

X’s molecules experience stronger dipole-dipole forces than Y’s molecules.
Y’s molecules experience stronger dipole-dipole forces than X’s molecules.
X’s molecules experience stronger London dispersion forces than Y’s molecules.
Y’s molecules experience stronger London dispersion forces than X’s molecules. r

Answer 1

The answer is,

D. Y’s molecules experience stronger London dispersion forces than X’s molecules.

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Answer 2

I believe the correct answer from the choices listed above is the last option. If the volatility of X is higher than that of Y, then Y’s molecules experience stronger London dispersion forces than X’s molecules. All molecules has london dispersion forces. Also, the stronger the bond, the harder it is to volatilize. Hope this answers the question.