Answer:
Dishes must be manually washed in c) Hot water.
Step-by-step explanation:
Hot water is the most effective temperature for manually washing dishes because it helps to remove grease, oils, and food residues more efficiently than cold or room temperature water.
When dishes are washed in hot water, the heat helps to dissolve and loosen the dirt and grime on the surfaces. It also helps to kill bacteria and other microorganisms that may be present on the dishes. Hot water can break down fats and oils, making it easier to remove them from dishes and utensils.
To effectively wash dishes with hot water, follow these steps:
1. Fill a sink or basin with hot water. The water should be comfortably hot to the touch, but not scalding.
2. Add dish soap or detergent to the hot water. This will create a soapy solution that will help to lift and remove dirt and grease from the dishes.
3. Place the dirty dishes into the soapy water, making sure they are fully submerged. Let them soak for a few minutes to allow the hot water and soap to loosen any stuck-on food particles.
4. Use a sponge, brush, or dishcloth to scrub the dishes, paying attention to all surfaces, including the inside and outside of bowls, plates, and utensils. The hot water and soap combination will help to break down and remove any remaining dirt or grease.
5. Rinse the dishes thoroughly with hot water to remove any soap residue. This step is important to ensure that no soap is left on the dishes, which can affect the taste and quality of food.
6. Allow the dishes to air dry or use a clean towel to dry them before putting them away.
In summary, hot water is the recommended temperature for manually washing dishes. It helps to dissolve grease, oils, and food residues, making it easier to clean and sanitize the dishes effectively. Remember to always use hot water in a safe and comfortable temperature range to avoid scalding or burns.