Which of the following is an example of a weak acid?
Answer and explanation
Correct answer: Acetic acid in vinegar
A weak acid ionises only partially in water, so it produces fewer hydrogen ions than a strong acid of comparable concentration. Acetic acid, the principal acid in vinegar, is a weak acid; therefore option D is correct. Hydrochloric acid and nitric acid are strong acids, and sulphuric acid is also treated as a strong acid at the school level. The distinction is based on ionisation, not on whether the substance tastes sour.
Frequently asked questions
What is the correct answer to this question?
Acetic acid in vinegar
Why is this the correct answer?
A weak acid ionises only partially in water, so it produces fewer hydrogen ions than a strong acid of comparable concentration. Acetic acid, the principal acid in vinegar, is a weak acid; therefore option D is correct. Hydrochloric acid and nitric acid are strong acids, and sulphuric acid is also treated as a strong acid at the school level. The distinction is based on ionisation, not on whether the substance tastes sour.
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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