Q2 of 48 Page 2

fresh mil has a ph of 6.How do you think the ph will change as it turns into curd ? explain. (CBSE 2012,2011,2010,2009) 

The pH of fresh milk is 6. As milk turns into curd, lactic acid is formed due to which it become more acidic. Therefore, the pH of milk will reduce.

As the milk turns into curd, its pH will fall below 6 (it will become more acidic). This is because an acid (lactic acid) is produced when milk turns into curd.

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