Question

what is curdling of a milk?

Answer 1

Answer:

Hey mate!

The answer is:

It refers to the conversion of milk to curd by the chemical reaction which occurs between the lactic acid bacteria and the casein protein of milk.

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Answer 2

Answer:

When pH levels drop in milk, it turns acidic and milk protein (casein and others) molecules attract one another to form "curdles" or lumps. These lumps then float on the surface of the solution. The lumps are formed faster at warmer temperatures.