(A) Sodium stearate is an anionic surfactant. In water,it forms spherical micelles. The hydrophobic hydrocarbon tail,$CH_{3}(CH_{2})_{16}-$,points tow

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It forms spherical micelles with $CH_{3}(CH_{2})_{16}-$ group pointing towards the center of the sphere.

(A) Sodium stearate is an anionic surfactant. In water,it forms spherical micelles. The hydrophobic hydrocarbon tail,$CH_{3}(CH_{2})_{16}-$,points towards the center of the sphere to avoid contact with water,while the hydrophilic head,$-COO^{-}$,points towards the surface to interact with water.

Class 12 Chemistry Surface Chemistry Colloids, Emulsion, Gel and Their properties with application

Difficult

Sodium stearate $CH_{3}(CH_{2})_{16}COO^{-}Na^{+}$ is an anionic surfactant which forms micelles in water. Choose the correct statement for it from the following:

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A
It forms spherical micelles with $CH_{3}(CH_{2})_{16}-$ group pointing towards the center of the sphere.
B
It forms non-spherical micelles with $CH_{3}(CH_{2})_{16}-$ group pointing towards the center.
C
It forms spherical micelles with $CH_{3}(CH_{2})_{16}-$ group pointing towards the surface of the sphere.
D
It forms non-spherical micelles with $-COO^{-}$ group pointing outwards on the surface.