Question

what happens when Be react with Hydrogen. Explain in brief ​

Answer 1

Answer:

Atomic hydrogen is very reactive. It combines with most elements to form hydrides (e.g., sodium hydride, NaH), and it reduces metallic oxides, a reaction that produces the metal in its elemental state. ... Almost all metals and nonmetals react with hydrogen at high temperatures.

Answer 2

Answer:

The oxidation potential of beryllium is very low. Beryllium is not able to give electrons to hydrogen. All the alkaline earth metal hydrides are prepared by the direct reaction of metal with hydrogen except beryllium.

Explanation:

In the reaction of alkali metals with hydrogen metal gets oxidized and hydrogen gets reduced. Alkaline earth metal has higher oxidation potential than hydrogen, so alkaline earth metal gets oxidized and hydrogen gets reduced. The reaction of metal with hydrogen is as follows:

M + H2→MH2

Here, M is the alkaline earth metals except beryllium.

The hydride of beryllium is prepared by the reaction of beryllium chloride with lithium hydride in presence of ether which gives beryllium hydride, aluminium chloride and lithium chloride.

The reaction of formation of beryllium hydride is as follows:

2BeCl2+LiAlH4→ether2BeH2 + AlCl3 + LiCl

So, option (A) is correct.

Beryllium does not react with hydrogen directly because its oxidation potential is very low, so it is not able to get oxidized and donate electrons to hydrogen so hydrogen cannot get reduced hydrogen by beryllium.