Which element evolves two gases on reaction with h2so4?
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Potassium, Sodium, and Calcium can liberate hydrogen from dilute H2SO4 solution.
The reactions are as follows:
2K + H2SO4 → K2SO4 + H2↑
2Na + H2SO4 → Na2SO4 + H2↑
Ca + H2SO4 → CaSO4 + H2↑
The elements which are below hydrogen in the reactivity series such as gold, silver, mercury cannot liberate hydrogen from dilute H2SO4.
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