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Q86 (UPPCS/2021) Science & Technology › Basic Science (Physics, Chemistry, Biology)

Which of the following is NOT correctly matched ?

Explanation

The incorrect match is Option C. The souring of milk is a biological process where lactose (milk sugar) is fermented into lactic acid by bacteria such as Lactobacillus. Nitric acid (HNO3) is a strong mineral acid and is not involved in the natural souring of milk.

The other options are correctly matched:

  • Vinegar: Contains acetic acid (typically 5-8% by volume).
  • Bones: The primary mineral component of bone is hydroxyapatite, which is a crystalline form of calcium phosphate.
  • Gastric juice: The stomach secretes hydrochloric acid (HCl) to create an acidic environment for protein digestion and to eliminate pathogens.
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SIMILAR QUESTIONS

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Which of the following pairs is/are NOT correctly matched ?
(Acid) (Acid found in)
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2. Tartaric acid - Grapes
3. Acetic acid - Potato
Select the correct answer from the code given below :
Code :

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