Hydride formed when an s-block metal is heated with hydrogen

This type of question, asked 2 times: 11 Apr 2026 S1, 13 May 2026 S1. All 2 questions below, oldest first.

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Question 1
11 Apr 2026 S1
12 $Which of the following is obtained when dihydrogen reacts with the alkali metals at high temperature?$
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Question 2
13 May 2026 S1
13 $\mathrm{MH_2}$
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