English
Tamil Nadu Board of Secondary EducationSSLC (English Medium) Class 6

Soaps were originally made from ______.

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Question

Soaps were originally made from ______.

Options

  • proteins

  • animal fats and vegetable oils

  • chemicals extracted from the soil

  • foam booster

MCQ
Fill in the Blanks
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Solution

Soaps were originally made from animal fats and vegetable oils. 

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Chapter 3: Chemistry in Everyday Life - Evaluation [Page 44]

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Samacheer Kalvi Science - Term 3 [English] Class 6 TN Board
Chapter 3 Chemistry in Everyday Life
Evaluation | Q I. 1. | Page 44

RELATED QUESTIONS

While preparing soap a small quantity of common salt is generally added to the reaction mixture of vegetable oil and sodium hydroxide. Which one of the following may be the purpose of adding common salt?

(A) To reduce the basic nature of the soap

(B) To make the soap neutral

(C) To enhance the cleansing power of the soap

(D) To favour the precipitation of the soap


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(a) Sodium chloride, calcium chloride

(b) Potassium chloride, sodium chloride

(c) Sodium chloride, magnesium chloride

(d) Calcium chloride, magnesium chloride


Would you be able to check if water is hard by using a detergent?


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A student is testing water to know which is best for cleansing purposes with soaps. He would find that the cleansing action of soaps is best when he uses water obtained from

(a) rain

(b) tap

(c) hand pump

(d) pond


What is the difference between the chemical composition of soaps and detergents? State in brief the action of soaps in removing an oily spot from a shirt. Why are sops not considered suitable for washing where water is hard?


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What are the differences between Bath soap and soap for washing clothes?


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