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Standard IX
Chemistry
Cleansing Action of Soap
The end of a ...
Question
The _______ end of a soap molecule repels water.
A
hydropilic
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B
hydrophobic
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C
hydrogenic
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D
hyroxide
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Solution
The correct option is
B
hydrophobic
The tail of a soap molecule is the hydrophobic part, and it repels water.
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Soap molecules have two parts - a polar and a non-polar. When soap is added to water:
Q.
(a) What is a soap? Name one soap.
(b) Describe the structure of a soap molecule with the help of a diagram.
(c) Explain the cleansing action of soap. Draw diagrams to illustrate your answer.