Which are used is dish-washers

Options

A. Cationic detergent
B. Anionic detergent
C. Soaps
D. Non-ionic detergents

Answer

### Step-by-Step Solution:

1. **Understanding the Types of Detergents**: Dishwashers typically use different types of detergents, which can be categorized into four main types: cationic detergents, anionic detergents, soaps, and non-ionic detergents.

2. **Identifying the Most Common Type**: Among these, non-ionic and synthetic non-ionic detergents are the most commonly used in dishwashers. This is due to their effectiveness in cleaning without reacting adversely with hard water.

3. **Functionality of Non-Ionic Detergents**: Non-ionic detergents contain hydrogen bonding groups that enhance their solubility in water. They work by forming micelles, which encapsulate and remove grease and oil from dishes.

4. **Example of a Non-Ionic Detergent**: An example of a non-ionic detergent is "Pantary Thretyl Palmitate." Its structure includes a long non-polar hydrocarbon chain and a polar group, which allows it to interact with both water and grease.

5. **Conclusion**: Therefore, the correct answer to the question of which detergents are used in dishwashers is non-ionic detergents.

### Final Answer:
Non-ionic detergents are used in dishwashers.

---