SCIENCE
CHEMISTRY
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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soap molecules emulsify oil
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soap reacts with an acid to form salt
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soap increases the surface tension of water
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the hydrophobic part of soap molecules dissolves in water
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Detailed explanation-1: -The cleansing action of both soaps and detergents results from their ability to lower the surface tension of water, emulsify oil or grease, and hold them in a suspension in water. Hence, Option 1 is correct.
Detailed explanation-2: -The cleansing action of soap is determined by its polar and non-polar structures in conjunction with an application of solubility principles. The long hydrocarbon chain is of course non-polar and hydrophobic (repelled by water). The “salt” end of the soap molecule is ionic and hydrophilic (water soluble).
Detailed explanation-3: -Therefore, the cleansing action of soap is due to emulsification and micelle formation.
Detailed explanation-4: -Soap can emulsify fats and oils by forming micelles around oil droplets. The soap molecules surround an oil droplet so that their nonpolar tails are embedded in the oil and their charged “head” groups are on the exterior of the droplets, facing the water.
Detailed explanation-5: -Detailed Solution The correct answer is option 3. Soaps are molecules in which the two ends have differing properties. One is hydrophilic, which dissolves in water, while the other end is hydrophobic, which dissolves in hydrocarbons.