Question 2:
People use a variety of methods to wash clothes. Usually after adding the soap, they
‘beat’ the clothes on a stone, or beat it with a paddle, scrub with a brush or the
mixture is agitated in a washing machine. Why is agitation necessary to get clean
clothes?
Answer:
A soap molecule has two parts namely hydrophobic and hydrophilic. With the help of
these, it attaches to the grease or dirt particle and forms a cluster called micelle.
These micelles remain suspended as a colloid. To remove these micelles (entrapping
the dirt), it is necessary to agitate clothes.
Latest Govt Job & Exam Updates: