Which of the following elements does not form hydride by direct heating with dihydrogen?

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Solution

The correct option is A Be
All the elements except beryllium combine with hydrogen upon heating to form their hydrides, $M H_{2}$
$B e H_{2}$ , however, can be prepared by the reaction of $B e C l_{2}$ with $L i A l H_{4}$ .
$2 B e C l_{2} + L i A l H_{4} \to 2 B e H_{2} + L i C l + A l C l_{3}$

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Which of the following elements does not form hydride by direct heating with dihydrogen?
(a) Be (b) Mg (c) Sr (d) Ba

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