Question

The pair that give same gaseous product?

Answer 1

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Ca and CaH2 gives the same gaseous product, i.e.H2

Ca + H2O → Ca(OH)2 + H2↑

CaH2 + 2H2O → Ca(OH)2 + 2H2↑

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Answer 2

The pair that gives the same gaseous product is Solution : Ca and CaH2 gives H2 and calcium hydroxide when reacted with water