Question

Fresh milk has a $pH$ of $6$, when milk changes into curd, the $pH$ will:

• A. Become $7$
• B. Become less than $6$
• C. Become more than $7$
• D. Remain unchanged

Answer 1

The correct option is B Become less than $6$

When milk changes into curd, the $pH$ value will change. Since the $pH$ value of milk is $6$ it is acidic in nature. When milk converts into curd due to action of bacteria, lactic acid is formed which is more acidic in nature. Therefore, the $pH$ value of milk reduces as it turns into curd.