Question

In the soap micelles:

• A. the ionic end of soap is on the surface of the cluster while the carbon chain is in the interior of the cluster
• B. ionic end of soap is in the interior of the cluster and the carbon chain is out of the cluster
• C. both ionic and carbon chain are in the interior of the cluster
• D. both ionic end and carbon chain are on the exterior of the cluster

Answer 1

The correct option is A the ionic end of soap is on the surface of the cluster while the carbon chain is in the interior of the cluster

These molecules contain hydrophobic (water-insoluble) part such as fatty acid or a rather long chain carbon group fatty alcohol and it is an interior part.

The molecule also contains a hydrophilic (water-soluble) group such as $-COONa$ or a sulfo group and it is an exterior part.

The hydrophobic part attaches itself to fiber and to dirt particle and the hydrophilic part attaches to water.

Option A is correct.