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In lithium hydride the oxidation number of hydrogen is:

APlus one
BMinus two
CPlus two
DMinus one
Answer & Solution
Correct answer: D. Minus one
1. Hydrogen is bonded to a metal there. 2. That reverses the usual assignment. 3. It becomes minus one. _Source: syllabus Chemistry, Unit 7 'Redox Reactions'_
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