Concept:Surface tension is the property of a liquid that makes its surface act like a stretched elastic film.
Explanation:Raincoats are made water-repellent by applying materials that reduce wetting, which is related to surface tension.
Soap lowers the surface tension of water, so soapy water spreads easily and removes grease from plates.
A steel needle can float on still water because the water surface resists penetration due to surface tension.
However, the production of palm oil depends mainly on mechanical pressing, heating, and separation of oil from the fruit pulp.
No significant role of surface tension is involved in palm oil extraction.
Therefore, the exception among the given options is the production of palm oil.
Answer:B. production of palm oil