Soaps are made by reacting fats with _______?

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  1. Potassium 
  2. Hydroxide 
  3. Calcium
  4. Sodium 

Answer (Detailed Solution Below)

Option 4 : Sodium 
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CONCEPT:

Soap Formation (Saponification)

  • Soaps are formed through a chemical reaction called saponification, which involves the reaction between fats (or oils) and an alkali.
  • Fats are primarily composed of triglycerides, which are esters of fatty acids and glycerol.
  • During saponification, the triglycerides react with a strong base (such as sodium hydroxide or potassium hydroxide) to produce soap and glycerol.

EXPLANATION:

  • In the context of soap formation:
    • The alkali used in the reaction is typically sodium hydroxide (NaOH) or potassium hydroxide (KOH).
    • Sodium hydroxide produces harder soaps, whereas potassium hydroxide produces softer or liquid soaps.
  • Reaction example:

    Fat + Sodium hydroxide → Soap + Glycerol

  • Soaps are made by reacting fats with sodium, specifically sodium hydroxide.

Therefore, soaps are made by reacting fats with sodium hydroxide.

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Last updated on Jul 1, 2025

-> The Indian Army has released the Exam Date for Indian Army Havildar SAC (Surveyor Automated Cartographer).

->The Exam will be held on 9th July 2025.

-> Interested candidates had applied online from 13th March to 25th April 2025.

-> Candidates within the age of 25 years having specific education qualifications are eligible to apply for the exam.

-> The candidates must go through the Indian Army Havildar SAC Eligibility Criteria to know about the required qualification in detail. 

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