Question

In the following diagram, if acetic acid of same concentration is taken in place of dilute sulphuric acid, then:

Options

• Same amount of H₂ gas will be evolved.

• H₂ gas will not be evolved.

• The amount of H₂ gas evolved in less amount.

• In place of H₂ gas, O₂ gas will be evolved.

Answer 1

The amount of H₂ gas evolved in less amount.

Explanation:

Dilute sulphuric acid is a strong acid and ionizes completely in water. Acetic acid is a weak acid and ionizes only partially. Fewer H⁺ ions are available in acetic acid compared to sulphuric acid. Hence, less hydrogen gas will be produced when acetic acid is used. Since acetic acid is a weak acid, the amount of hydrogen gas evolved will be less compared to dilute sulphuric acid.