Hydrophobic substances are substances that do not mix with water and exclude water molecules. Hydrophobic also means "fear of water." Oil, which appears in the picture above, is hydrophobic because oil is non-polar and water is polar. So, they are not attracted to each other. They can't mix and oil has no affinity for water. The water and the oil picture above represent hydrophobic because if you try to mix both of them, they will go on different ways.
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