Question

Water is dissolved into n-butanol (a polar liquid). Which is the second step at the molecular level as water dissolves into n-butanol?
n-Butanol mixes with water.
Water molecules are carried into n-butanol.
n-Butanol molecules surround water molecules.
n-Butanol molecules are attracted to the surface of the water molecules.

Answer 1

Second: "n-Butanol molecules surround water molecules."

Reason: first the butanol molecules are attracted to the water at the interface, then they form a solvation shell (orienting their OH groups to hydrogen-bond to the water and surrounding the water molecule). After solvation the water molecules diffuse into the butanol phase and macroscopic mixing occurs.