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Hydrophobia

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Hydrophobia

In chemistry, hydrophobicity refers to the physical property of a molecule (known as a hydrophobe) that is repelled from a mass of water.
Hydrophobic molecules tend to be non-polar and thus prefer other neutral molecules and nonpolar solvents. Hydrophobic molecules in water often cluster together forming micelles. Water on hydrophobic surfaces will exhibit a high contact angle.

Here is the microscopic image of oil drops on water.