Dry hydrogen when passed over a heated metals like Na, K and Ca, reacts to give their corresponding _______ .
Carbonates
Hydrides
Oxides
Sulphates
Dry hydrogen when passed over heated metals like Na, K and Ca, reacts to give their corresponding hydrides.
When metals like Na, K, Ca react with acids like HCL , Hydrogen gas is evolved. Explain why no evolution of hydrogen gas takes place when the same metals react with HNO3.