Question

hydrogen is not prepared by conc H2 SO4​

Answer 1

Answer:

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Explanation:

Conc. sulphuric acid is not used in the preparation of hydrogen as it will produce sulphur dioxide.

Answer 2

Answer:

Conc. sulphuric acid is not used in the preparation of hydrogen as it will produce sulphur dioxide.

Explanation:

Dilute sulphuric acid will react to produce hydrogen gas. Increasing the concentration will increase the rate of reaction. Since the product is in another phase (hydrogen is a gas) too rapid a reaction brings a risk of overpressurization and explosion..

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