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Which of the followingg elements does not form hydride by direct heating with dihydrogen?
A. `Be`
B. Mg
C. Sr
D. Ba

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Correct Answer - A
All the elements except beryllium combine with hydrogenn upon heating to form their hydrides, `NH_(2)`.
`BeH_(2)`, however, can be prepared by the reaction of `BeCl_(2)` with `LiAlH_(4)`.
`2BeCl_(2)+LiAlH_(4) to 2BeH_(2)+LiCl+AlCl_(3)`.

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