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CBSE Class 10 Science Question 10 of 34

Acids, Bases and Salts — Question 10

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Question 10

Equal lengths of magnesium ribbons are taken in test tubes A and B. Hydrochloric acid (HCl) is added to test tube A, while acetic acid (CH3COOH) is added to test tube B. Amount and concentration taken for both the acids are same. In which test tube will the fizzing occur more vigorously and why?

Answer

Fizzing will be more vigorous in test tube A due to the higher concentration of H+(aq) ions in hydrochloric acid (HCl) as compared to acetic acid (CH3COOH). Hydrochloric acid (HCl) is the stronger acid and its reactions with magnesium ribbon will result in faster rate of release of hydrogen gas.