The sodium hydroxide is used in the manufacture of

Options

A. Soaps
B. Dyes
C. Rayon
D. All of these

Answer

**Step-by-Step Solution:**

1. **Understanding Sodium Hydroxide (NaOH):**
- Sodium hydroxide, commonly known as caustic soda, is a strong alkaline compound used in various chemical processes.

2. **Role in Soap Making:**
- Sodium hydroxide is crucial in the process of saponification, which is the chemical reaction that produces soap from fats and oils. It acts as a reagent that reacts with fatty acids to form soap.

3. **Manufacture of Dyes and Paints:**
- Sodium hydroxide is also used in the production of dyes and paints. It helps in the synthesis and processing of various dye compounds, enhancing their solubility and reactivity.

4. **Production of Rayon:**
- Rayon, a synthetic fiber, is produced using sodium hydroxide in the process of dissolving cellulose. This allows for the regeneration of cellulose into fibers.

5. **Conclusion:**
- Given the multiple applications of sodium hydroxide in manufacturing soaps, dyes, and rayon, it can be concluded that sodium hydroxide is indeed used in the manufacture of all these products.

6. **Final Answer:**
- Therefore, the correct answer to the question is: **All of these** (soaps, dyes, rayon).

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