1.

How does the change occur to ph value of milk when it changes to curd.

Answer»

The pH scale is used to MEASURE the acidity of a SUBSTANCE. The pH of milk is 6 while that of curd is of the range 4.5 - 5.5. The pH decreases as milk changes into curd. This is because of the formation of lactic acid which as the name suggests is acidic in NATURE.



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