A milkman adds a very small amount of baking soda to fresh milk. Why?

Why Milkman Adds Baking Soda

A milkman adds a very small quantity of baking soda to fresh milk, as it helps the milkman to keep the milk unspoiled for a little more time than usual. (If there is no baking soda in the milk, it will not last for a long time and will convert into curd soon). After adding soda, the pH value of the milk (the pH value of milk is generally 6 before adding soda) increases, and it turns the milk to slightly alkaline. When the milk is boiling, and when we consume the boiled milk, it tastes a little bitter; the bitterness is due to the presence of soda in the milk. Now that there is soda in the milk and it has turned alkaline, the alkaline base will prevent the milk from turning directly to curd. Now, the milk will take a longer time to convert itself from milk to curd.

-Written By Nehal Rathi