Question

Sodium lauryl sulphate is an example of
A. Natural detergent B. Synthetic detergent C. Higher fatty acid D. Rectified spirit​

Answer 1

Answer :

Sodium lauryl sulphate is an example of Synthetic detergent.

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A] Soaps : These are sodium or potassium salts of higher fatty acids (with 16-18 carbon atoms) e.g., palmitic acid, stearic acid, oleic acid ,linoleic acid etc. Only Na/K soaps are soluble in water and are used for cleaning purposes. Generally, potassium soaps are soft to the skin than sodium soaps. Soaps do not work in hard water.

B] Synthetic detergents : These are spdium salts of long chain sulphonates ans sulphates and are classified as;

• Cationic detergents : Their polar head is positively charged e.g., cetyltrimethylammonium bromide. These are used as fabric softener and hair conditioner.
• Anionic detergents : Their polar head is negatively charged. e.g., Sodium lauryl sulphate. Such detergents are used to wash clothes.