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Class 10ScienceChemical Substances – Nature and BehaviourAcids, Bases, and SaltsEasyLevel 8

Which acid is present in curd?

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Answer and explanation

Correct answer: Lactic acid

Bacterial fermentation of lactose in milk produces lactic acid. This acid is mainly responsible for the sour taste of curd. Citric acid occurs mainly in sour fruits such as lemon, so option B is incorrect. Exam tip: Remember the pair: curd—lactic acid; lemon—citric acid.

Tags

scienceclass 10acids bases saltslactic acidcurdfermentation

Frequently asked questions

What is the correct answer to this question?

Lactic acid

Why is this the correct answer?

Bacterial fermentation of lactose in milk produces lactic acid. This acid is mainly responsible for the sour taste of curd. Citric acid occurs mainly in sour fruits such as lemon, so option B is incorrect. Exam tip: Remember the pair: curd—lactic acid; lemon—citric acid.

Which subject and chapter does this question cover?

This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.

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  1. 1What type of substance turns blue litmus paper red?
  2. 2What type of substance turns red litmus paper blue?
  3. 3Which of the following substances acts as a natural indicator?
  4. 4What is the general nature of an aqueous soap solution?
  5. 5Which of the following substances turns red litmus paper blue?
  6. 6What is the nature of a solution whose pH is less than 7?
  7. 7At 25°C, a solution with a pH greater than 7 is of which nature?
  8. 8A student dips red litmus paper into a soap solution. What change will occur in the red litmus paper?
  9. 9Which gas is generally produced when dilute acids react with active metals?
  10. 10A student dips red litmus paper into a soap solution. What will be the colour of the litmus paper?
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