1. Tardigrade
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  3. Chemistry
  4. An element reacts with hydrogen to form a compound A which on treatment with water liberates hydrogen gas. The element can be

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Q. An element reacts with hydrogen to form a compound A which on treatment with water liberates hydrogen gas. The element can be

Hydrogen

Solution:

$Ca + H _{2} \rightarrow CaH _{2} \stackrel{2 H _{2} O }{\longrightarrow } Ca ( OH )_{2}+2 H _{2}$