Question

What is the purpose of adding cleansing agent?

(a) Increase wet ability and decrease surface tension

(b) Decrease wet ability and increase surface tension

(c) Decrease wet ability

(d) Increase surface tension

I had been asked this question during an online interview.

Origin of the question is Natural Products topic in section Natural Products of Chemical Technology

Answer 1

Right answer is (a) Increase wet ability and decrease surface tension

To explain: Cleansing agent provides hydrophilic and hydrophobic groups which are responsible for increase in wetting ability and decreasing the surface tension.