Hydrophobic interactions between nonpolar molecules or groups result from the te
ID: 72178 • Letter: H
Question
Hydrophobic interactions between nonpolar molecules or groups
result from the tendency to maximize water's contact with nonpolar molecules
depend on strong permanent dipoles in the nonpolar molecules
are the result of strong repulsion between water and nonpolar regions
require the presence of surrounding water molecules
are the result of strong attractions between nonpolar regions
A.result from the tendency to maximize water's contact with nonpolar molecules
B.depend on strong permanent dipoles in the nonpolar molecules
C.are the result of strong repulsion between water and nonpolar regions
D.require the presence of surrounding water molecules
E.are the result of strong attractions between nonpolar regions
Explanation / Answer
Answer:
The interactions present between the non-polar molecules are called hydrophobic interactions. Water molecules prefer strong interactions with other molecules. In order to show high tendency of interactions with other molecules, water exclude non-polar groups.
The tendency of non-polar molecules in a polar solvent (usually water) to interact with one other is called hydrophobic effect. Due to the inability of forming hydrogen bonds and electrostatic interactions of non-polar groups, the interactions are very weak compared with that of interactions amongst water molecules.
When non-polar molecules are introduced to the water molecule, the water molecules will initially surround the non-polar molecules, forming cages around the molecules,
Hence, the hydrophobic interactions between nonpolar molecules or groups require the presence of surrounding water molecules.
Hence, option (D) is the correct answer.
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