Write main properties of synthetic detergents.

Explanation

### Step-by-Step Solution

1. **Definition of Synthetic Detergents**: Synthetic detergents are man-made cleaning agents that are designed to remove dirt and grease from surfaces. Unlike traditional soaps, they are made from synthetic materials.

2. **Non-Reactivity with Hard Water**: One of the main properties of synthetic detergents is that they do not react with the ions present in hard water. This means that they can effectively clean even in water that contains high levels of calcium and magnesium ions, which typically interfere with the cleaning action of soaps.

3. **Foaming Ability**: Synthetic detergents tend to produce a lot of foam when mixed with water. This foaming action helps in lifting dirt and grease from surfaces, making them more effective for cleaning purposes.

...