Which one of the following sets of materials can be used to prepare soap?(A) Neem oil and calcium hydroxide
(B) Castor oil and sodium hydroxide
(C) Mineral oil and sodium hydroxide
(D) Neem oil and magnesium hydroxide
Answers
In the preparation of soap, saponification occurs when a strong alkali reacts with vegetable oil (or animal fat). As far as your question is concerned, the choice is pretty simple. You can always use NaOH and neem oil for the saponification process in the preparation of soap. Mineral oil cannot be used for the reaction as the resulting soap will become oily or greasy.
So, the correct answer is B) NaOH and neem oil.
Answer:
The general formula RCOO-Na+ denotes soaps, where R is any long alkyl chain group consisting of 12 to 18 carbon atoms.
Explanation:
Soaps are salts of potassium or sodium fatty acids formed in a chemical reaction called saponification. soap molecule has a long hydrocarbon chain with a carboxylate head, often called its 'tail.'
Soap is prepared by the reaction of Castor oil and sodium hydroxide. sodium ions float free in water and leave negatively charged hea (polar molecule) that interacts with water molecules via ion-dipole interactions and hydrogen bonding. castor oil has lathering ability, contributing to large bubbles and is known for its cleansing properties.
Hence, the correct option is (B)
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