Question

Which of the following reaction produces hydrogen?

a) Mg+H2O

b) BaO2+HCl

c) H2S4O8+H2O

d) Na2O2+2HCl​

Answer 1

Explanation:

Correct option a Mg + H2OExplanation:Alkali and alkaline earth metals react with water to produce hydrogen gas and metal hydroxide. This is due to their high electropositive character.2Na + 2H2O → 2NaOH + 2NaOH+ H2Mg + 2H2O → MgOH2 + H2

Answer 2

Option (a) Mg+H20

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