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| Q. |
Soap is prepared by boiling caustic soda with – |
| A. | Alcohol |
| B. | Kerosene oil |
| C. | Glycerine |
| D. | Fats |
| Answer» D. Fats | |
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Explanation: The most basic kind of soap is made from cuastic soda and animal fat. The two are heated together, and then cooled. The process is called "saponification". In technical terms, saponification involves base (usually caustic soda NaOH) hydrolysis of triglyeerides which are esters of fatty acids, to form the sodium salt, of a carboxylate. |
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