Detergents and dying substances act as:
ACooling agents
BHeating agents
CWetting agents
DDrying agents
Answer & Solution
Correct answer: C. Wetting agents
1. These substances have to spread over the fabric to work.
2. They cut the angle of contact so the liquid spreads.
3. So they act as wetting agents.
_Source: NCERT Class 11 Physics Part II, Chapter 10, Mechanical Properties of Fluids._
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