Introduction
Liquid dishwashing agents are commonly used for cleaning dishes and kitchen utensils. They are designed to remove grease, oil, and food particles from dishes effectively. There are different types of liquid dishwashing agents available in the market. In this response, we will discuss the types of liquid dishwashing agents and their characteristics.

Anionic detergent
Anionic detergents are one of the most commonly used liquid dishwashing agents. They are effective in removing dirt and grease from dishes. Anionic detergents contain negatively charged molecules that interact with positively charged dirt and grease particles, forming a micelle. This micelle helps to lift the dirt and grease particles away from the surface of the dishes.

Non-ionic detergent
Non-ionic detergents are another type of liquid dishwashing agent. They are milder than anionic detergents and are often used for delicate dishes. Non-ionic detergents contain molecules that are not charged, which makes them less harsh on surfaces. They are effective in removing grease and oil and are often used in combination with anionic detergents for better cleaning.

Soaps
Soaps are also used as liquid dishwashing agents. They are made from natural products such as fats and oils. Soaps are effective in removing dirt and grease from dishes, but they can leave a residue on the surface of the dishes. They are also less effective in hard water.

Cationic detergents
Cationic detergents are not commonly used as liquid dishwashing agents. They contain positively charged molecules that are effective in removing grease and oil. However, they are not effective in removing dirt and are often used in combination with anionic detergents.

Conclusion
In conclusion, liquid dishwashing agents are an essential part of daily household cleaning. Anionic detergents are the most commonly used liquid dishwashing agents due to their effectiveness in removing dirt and grease. Non-ionic detergents are milder and are often used for delicate dishes. Soaps are also used but can leave a residue on the surface of the dishes. Cationic detergents are less commonly used due to their limited effectiveness in removing dirt.

Non-ionic detergents are used in dish washing liquids. Since the detergent does not have any ionic groups, it does not react with hard water ions but can remove grease and oil by micelle formation.