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All alkali metals in their compounds have an oxidation number of:
APlus five
BPlus one
CPlus two
DPlus four
Answer & Solution
Correct answer: B. Plus one
1. Alkaline earth metals carry plus two.
2. Alkali metals sit one group to their left.
3. They carry plus one.
_Source: NCERT Class 11 Chemistry, Unit 7 'Redox Reactions'_
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