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All the group 2 elements except___combine with dihydrogen upon heating to form their hydrides,`MH_(2)`.

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All the group 2 elements except___combine with dihydrogen upon heating to form their hydrides,`MH_(2)`.
A. Mg
B. Be
C. Ca
D. Sr
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Correct Answer - B
`BeH_(2)` is prepared by the raction of `BeCl_(2)` with `LiAlH_(4)`
`2BeCl_(2)+LiAlH_(4)to2BeH_(2)+LiCl+AlCl_(3)`
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