BIOCHEMISTRY
PROPERTIES OF WATER
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Does soapy water have a “skin", which is caused by surface tension?
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Yes, it has a skin just like regular water.
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It does not have a skin.
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It has a bit of a skin.
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Explanation:
Detailed explanation-1: -Adding soap lowers the water’s surface tension so the drop becomes weaker and breaks apart sooner. Making water molecules stick together less is what helps soaps clean dishes and clothes more easily.
Detailed explanation-2: -Since the surface tension forces become smaller as the distance between water molecules increases, the intervening soap molecules decrease the surface tension.
Detailed explanation-3: -The surface tension of soap solution is 0.03 N/m.
Detailed explanation-4: -The surface tension of a soap solution is 25×10−3 N/m.
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