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GK QUESTION#3213

In the NCERT example, why does a milkman add a very small amount of baking soda to fresh milk?

  1. ATo reduce the pH of the fresh milk from 6 to slightly more acidic
  2. BTo increase the pH of the fresh milk from 6 to slightly alkalineCorrect answer
  3. CTo maintain the pH of the fresh milk at 6 for a longer time
  4. DTo reduce the pH of the fresh milk from 6 to slightly alkaline
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Answer

B. To increase the pH of the fresh milk from 6 to slightly alkaline

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Explanation

In the textbook example, baking soda raises the milk pH, so subsequently formed acid must first neutralise the added base before curd formation. Option B describes that shift. This explains the stated chemistry rather than endorsing adulteration as a preservation practice.

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