Commercial detergents mainly contain

Options

A. RCOONa
B. RONa
C. RSNa
D. `ROSO_(2)Na`

Explanation

**Step-by-Step Solution:**

1. **Understanding Commercial Detergents**: Commercial detergents are cleaning agents that are used in various applications, including household cleaning, laundry, and dishwashing.

2. **Identifying Key Components**: The main components of commercial detergents are surfactants, which help to reduce the surface tension of water and allow it to spread and penetrate more easily.

3. **Types of Surfactants**: The surfactants in commercial detergents are typically salts of higher fatty acids. These surfactants can be classified into anionic, cationic, nonionic, and amphoteric types.

4. **Specific Example**: A common example of an anionic surfactant found in commercial detergents is the salt of a higher fatty acid, which can be represented as RCOO⁻Na⁺, where R is a long hydrocarbon chain. This structure indicates that the surfactant has a hydrophobic (water-repelling) tail and a hydrophilic (water-attracting) head.

5. **Conclusion**: Therefore, commercial detergents mainly contain salts of higher fatty acids, which serve as effective surfactants for cleaning purposes.

**Final Answer**: Commercial detergents mainly contain salts of higher fatty acids.

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