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Question
Fresh milk has a pH of 6. When milk changes into curd, the pH value will:
(a) become 7
(b) become less than 6
(c) become more than 7
(d) remain unchanged
Solution
become less than 6
When fresh milk changes into curd, its acidity increases and it turns sour. Therefore, the pH of fresh milk becomes less than 6 when milk changes into curd.
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