Q. Materials for rain-proof coats and tents owe their water-proof properties to
✅ Correct Answer: (A)
surface tension
Explanation: The material of rain proof coats have the property of not minimizing the surface tension which will tend the water molecule to be in its drop form.
Explanation by: Yogesh
The material of rain proof coats have the property of not minimizing the surface tension which will tend the water molecule to be in its drop form.