Identify the false characteristic regarding detergents

Options

A. Anionic detergents bare sodium salts of sulphonated long chain hydrocarbons
B. In anionic detergents, the cationic part of detergent is involved in the cleansing action
C. Cationic detergents are quaternary ammonium salts of amines with bromides as onins
D. Liquid dishwashing detergents are non-ionic detergents

Answer

To identify the false characteristic regarding detergents, we will analyze each statement one by one.

### Step 1: Analyze Statement A
- **Statement A**: Anionic detergents pair sodium salts of sulfonated long-chain hydrocarbons.
- **Analysis**: This statement is true. Anionic detergents are indeed sodium salts of sulfonated long-chain hydrocarbons, which help in the cleansing process.

### Step 2: Analyze Statement B
- **Statement B**: In anionic detergent, the cationic part of the detergents is involved in the cleansing action.
- **Analysis**: This statement is false. In anionic detergents, it is the anionic part (the negatively charged part) of the molecule that is involved in the cleansing action, not the cationic part.

### Step 3: Analyze Statement C
- **Statement C**: Cationic detergents are quaternary ammonium salts of amines with bromide.
- **Analysis**: This statement is true. Cationic detergents are indeed quaternary ammonium salts, and they often contain bromide ions.

### Step 4: Analyze Statement D
- **Statement D**: Liquid dishwashing detergents are non-ionic detergents.
- **Analysis**: This statement is also true. Many liquid dishwashing detergents are classified as non-ionic detergents, which do not carry a charge.

### Conclusion
The false characteristic regarding detergents is found in **Statement B**. The correct statement should indicate that in anionic detergents, the anionic part of the molecule is involved in the cleansing action.

### Final Answer
**The false characteristic regarding detergents is Statement B.**

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