MCQ
A good surfactant will have a:
- AHydrophilic tail.
- ✓Hydrophilic head and a long hydrophobic tail.
- CHydrophobic head and tail.
- DHydrophilic head and a short hydrophobic tail.
✓
Answer
Correct option: B.
Hydrophilic head and a long hydrophobic tail.
A good surfactant will have a hydrophilic head and a long hydrophobic tail.
Therefore, a surfactant molecule contains both water insoluble $($or oil soluble component$)$ and a water soluble component.
Surfactant molecules will migrate to the water surface, where the insoluble hydrophobic group may extend out of the bulk water phase, either into the air or, if water is mixed with an oil, into the oil phase, while the water soluble head group remains in the water phase.
This alignment and aggregation of surfactant molecules at the surface, acts to alter the surface properties of water at the water/air or water/oil interface.
Therefore, a surfactant molecule contains both water insoluble $($or oil soluble component$)$ and a water soluble component.
Surfactant molecules will migrate to the water surface, where the insoluble hydrophobic group may extend out of the bulk water phase, either into the air or, if water is mixed with an oil, into the oil phase, while the water soluble head group remains in the water phase.
This alignment and aggregation of surfactant molecules at the surface, acts to alter the surface properties of water at the water/air or water/oil interface.
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