MCQs on Soap And Detergents surface-active agents

By: Prof. Dr. Fazal Rehman | Last updated: May 21, 2025

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1. : Which does not react with sodium hydroxide solution?



2. : Which type of organic compound does fat belong to?



3. : In the process of production of soap, the soap can be salted out by adding



4. : What is the use of the addition of brine solution in the production of soap from castor oil and sodium hydroxide?



5. : Soap and detergents eliminate the dirt from clothes due to which of the following?



6. : The green color of water in a lake is because of ______.



7. : When a drop of detergent solution is added onto a clean towel, it spreads instead of existing as a droplet. Which of the following statements describes this phenomenon?



8. : SDS is an example of which of the following?



9. : Which factors determine the property of soap?



10. : Which fatty acid is not present in Tallow/animal fat?



11. : Which of the following is the reaction of oils/fats with sodium hydroxide?



12. : Which of the following are the major industrial applications of glycerol?



13. : Which substances is/are added as binders?



14. : Soap is a salt of which compound?



15. : During the preparation of soap, the liquid separated by distillation is known as _____.



16. : Which statement is true with respect to builders?



17. : Which substances are helpful as builders?



18. : Which enzymes are helpful in detergents?



19. : Which fatty acids are used in soap manufacturing?



20. : Which of the following are the substances which lower the surface tension of water?



21. : Which are anionic detergents?



22. : Soft soap is made from _________ and fatty acids.



23. : Which fatty acids are present in palm kernel oil?



24. : Which fatty acid is not present in coconut oil?



25. : Soapy detergents and soap less detergent behave differently in hard water because they



26. : Each fat or oil is prepared with which of the following?



27. : What is caustic potash?



28. : The soap and detergents are source of organic pollutants like:



29. : __________ is best in its cleaning action.



30. : Turpentine is obtained from ___.



31. : ________ surfactants perform well over a wide range of water hardness and pH.



32. : Washing soap can be prepared by saponification with alkali and of the following oil.



33. : CTAB is an example of which of the following?



34. : Triton-31, an example of ____.



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