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Soft soaps are the limitation of hot process because of their ____________

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Soft soaps are the limitation of hot process because of their ____________

(a) High alkalinity

(b) Low alkalinity

(c) Low solubility in water

(d) High solubility in water

This question was addressed to me in a job interview.

My question comes from Soaps in chapter Industrially Important Materials of Engineering Chemistry II

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Correct answer is (d) High solubility in water

For explanation I would say: Soft soaps are the limitation of the hot process because of their greater solubility in water. When potassium hydroxide (KOH) is used, a soft soap is formed by the cold process. It cannot be used in hard water.

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