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  9. Q31

RRB Junior Engineer / DMS / CMA 2015 · Question 31 of 480

You can make soap at home from vegetable oil and

Chemistry - Everyday Chemistry

  1. Aa. caustic potash
  2. Bb. ammonium hydroxide
  3. Cc. caustic sodaCorrect
  4. Dd. sodium chloride

Answer: C. c. caustic soda

Explanation

When fats are heated with aqueous, caustic soda (sodium hydroxide) solution. The soap are formed Fats/vegetable oil + caustic soda-> (Sodium Hydroxide) Soap + Glycerol (By-product).

Source: Arihant RRB JE Solved Paper 26-Aug-2015 (3rd Shift), Q91–150 — published solved-paper compilation (Q1–90 technical not included in this source) · memory-based

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