Which category of the synthetic detergents is used in toothpaste?

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Solution

Synthetic anionic detergents are used in toothpaste.The anionic part of the molecule is involes in the cleansing action.usually, they contain either sulfate $(s o_{4}^{2 -})$ or sulfonate $(s o_{3}^{-})$ head group (which are anions).

They are used in toothpaste to clean the teeth and to provide a foam that helps in carrying away the debris.

Example: $C H_{3} (C H_{2})_{11} O S O_{3}^{-} N a^{+}$

Sodium lauryl sulfate

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Which category of the synthetic detergents is used in toothpaste?

Q. Fill appropriate terms in the blanks .
( white cement , soap, detergent , wearing of bones, tooth decay, hard, soft, Portland, fatty acid )

(a) The substance that helps water to remove dirt from the surface of materials is called ............... .

(b) Fluoride is used in toothpaste to prevent ................ .

(c) Soap is a salt of ............... and sodium hydroxide.

(d) Synthetic detergents can be used in .............. water as well .

(e) For construction purposes ............... cement is the most commonly used cement.

Which of the following statements are correct?
(a) Cationic detergents have germicidal properties
(b) Bacteria can degrade the detergents containing highly branched chains
(c) Some synthetic detergents can give foam even in ice cold water
(d) Synthetic detergents are not soaps

Sythetic detergents have advantage over usual soaps as far as cleansing power is concerned. But use of synthetic detergents over a long time creates environmental pollution. How can the pollution caused by synthetic detergents be minimised? Classify the detergents according to their chemical nature.

Can you use soaps and synthetic detergents to check the hardness of water?

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