Solution - Soaps and Detergents



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List two problems that arise due to the use of detergents instead of soaps.


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Why does micelle formation take place when soap is added to water? Will a micelle be formed in other solvents such as ethanol also?

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Which of the following sets of materials can be used for conducting a saponification reaction for the preparation of soap?

(a) Ca(OH)2 and neem oil

(b) NaOH and neem oil

(c) NaOH and mineral oil

(d) Ca(OH)2 and mineral oil

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A student takes about 4 ml of distilled water in four test tubes marked P, Q, R and S. He then dissolves in each test tube an equal amount of one salt in one test tube, namely sodium sulphate in P, potassium sulphate in Q, calcium sulphate in R and magnesium sulphate in S. After that he adds an equal amount of soap solution in each test tube. On shaking each of these test tubes well, he observes a good amount of lather (foam) in the test tube marked

(A) P and Q

(B) Q and R

(C) P, Q and S

(D) P, R and S

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Solution for concept: Soaps and Detergents. For the course 8th-10th CBSE