Home › CBSE Class 11 › Physics › Surface Tension › Waterproofing agents are added to create a large:
Waterproofing agents are added to create a large:
AAmount of surface
BVolume of liquid
CWeight of fabric
DAngle of contact
Answer & Solution
Correct answer: D. Angle of contact
1. Waterproofing has to keep water from spreading on the fibres.
2. A large angle of contact stops the liquid from wetting them.
3. So these agents work by raising the angle of contact.
_Source: NCERT Class 11 Physics Part II, Chapter 10, Mechanical Properties of Fluids._
Related questions
Detergents and dying substances act as:The pressure inside a spherical drop, against that outside, is:For a given volume the least surface area belongs to a:Free liquid drops and bubbles are spherical if we neglect:The hair of a paint brush forms a fine tip when it is:Sap and water rise up to the top of the leaves of a:Oil climbs up a cotton wick in spite of:Water sticks to glass, but mercury does not: