Among the alkali metals, the two abundant ones are potassium and:
ARubidium
BCaesium
CSodium
DLithium
Answer & Solution
Correct answer: C. Sodium
1. Lithium, rubidium and caesium are much rarer.
2. Two members of the group are plentiful.
3. They are sodium and potassium.
_Source: NCERT Class 11 Chemistry Part II, Unit 10, The s-Block Elements._
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