SELECT * FROM question_mgmt as q WHERE id=3588 AND status=1 SELECT id,question_no,question,chapter FROM question_mgmt as q WHERE courseId=9 AND subId=16 AND chapterId=255 and ex_no='5' AND status=1 ORDER BY CAST(question_no AS UNSIGNED) CBSE Free NCERT Solution of 10th science Carbon and Its Compound people use a variety of methods to wash clothes u

Question:

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: hydrophobic head and hydrophilic tail. With the help of these, it attaches to the grease or dirt particle with the hydrophobic end of the soap molecule and forms a cluster around dirt called micelles. These micelles remain suspended as a colloid. To break these micelles (entrapping the dirt), it is necessary to agitate clothes.


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  • Answered by Ekta Mehta
  • 4 months ago

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