In place of tetrachloroethene in dry-cleaning we use

Options

A. Sodium lauryl sulphate
B. Sodium stearate
C. Hydrogen peroxide
D. Sodium bisulphite

Answer

**Step-by-Step Solution:**

1. **Understanding Tetrachloroethene**: Tetrachloroethene, also known as perchloroethylene (PERC), has been traditionally used in dry cleaning due to its effectiveness in dissolving grease and stains. However, it is a hazardous chemical with potential health risks and environmental concerns.

2. **Green Chemistry Principles**: The shift towards using safer alternatives in dry cleaning aligns with the principles of green chemistry, which emphasizes the reduction of hazardous substances in chemical processes.

3. **Identifying Alternatives**: One of the most effective and environmentally friendly alternatives to tetrachloroethene in dry cleaning is hydrogen peroxide (H2O2).

4. **Mechanism of Action**: Hydrogen peroxide acts as a bleaching agent and a cleaning agent. When used in dry cleaning, it can break down stains and dirt effectively. It decomposes into water (H2O) and oxygen (O2), making it a non-toxic option.

5. **Catalysts in Use**: In some applications, hydrogen peroxide is used with suitable catalysts to enhance its cleaning properties. This combination allows for more efficient cleaning while maintaining safety.

6. **Conclusion**: Therefore, the replacement for tetrachloroethene in dry cleaning is hydrogen peroxide, which is a safer and environmentally friendly alternative.

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