Test:199 QNo:3

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The cleaning action of soap is due to

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sumit_kumar ·2010-01-30 02:32:02

Q3 The cleaning action of soap is due to
a) its dissociation into ions in water
b) the presence of Na+ ions in soap
c) the formation of associated colloids
d) its action as an emulsifying agent

Correct Answer: (d)

Shudn't the ans be c

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Subhomoy Bakshi ·2010-01-30 03:16:38

no it should be d only..nothing else

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Subhomoy Bakshi ·2010-01-30 03:18:23

the answer lies in surface tension....on addind soap to water ite surface tension decreases and so it is now able to creep up between the layer of dirt and layer of cloth as adhesive force now wins over cohesive force which now dereases....thus the dirt layer and the cloth surface are separated by a soap solution layer...thus the cloth now gets easily cleaned..:)

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Basic Integral Calculus Operators Symbols Matrix Cases

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Test:199 QNo:3

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