A drop of oil in water disperses when detergent is added because A) the nonpolar

Question

A drop of oil in water disperses when detergent is added because

            A) the nonpolar parts of the detergent molecules associate with the oil and the polar parts of the detergent molecules associate with the water.

            B)   the polar parts of the detergent molecules associate with the oil and the nonpolar parts of the detergent molecules associate with the water.

            C)   the nonpolar parts of the detergent molecules associate with the oil and with the water.

            D) the polar parts of the detergent molecules associate with the oil and with the water.

            E)        the detergent lowers the surface tension of the water.

Explanation / Answer

Answer

A) The non polar parts of the detergent molecules associate in water and the polar parts of the detergent molecules associates with water

Explanation

Detergents is a surfactant or a mixture of surfactants. Surfactants composed of two parts, 1.water liking hydrophillic Head and 2.water hating hydrophopic tail

Hydrophopic tail of surfactant move away from water molecule and it attaching with oil but hydrophilic part is still is attaching with water molecule, so,forming a miscelle made up of oil and surfactant and surfacetension of water is reduced.

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