When Na and Li placed in dry air we get:-
Correct answer: D. Na2O, Li2O, Li3N
- A. NaOH, Na2O, Li2O
- B. Na2CO3, Na2O2, Li2O
- C. Na2O, Li3N, NH3
- D. Na2O, Li2O, Li3N
Explanation
When Na and Li are placed in dry air, we get a mixture of sodium oxide (Na2O) and lithium oxide (Li2O). Lithium nitride (Li3N) is also formed due to the reaction of lithium with nitrogen. The correct option is D because in these conditions, sodium does not form sodium hydroxide or sodium superoxide, and lithium does not react to form ammonia.Options A, B, and C are incorrect because they suggest compounds that are not typically formed when alkali and alkaline earth metals are exposed to dry air.
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About s-Block and p-Block Elements
The s and p blocks are studied through their valence-shell configurations, periodic trends and characteristic chemical properties. Work covers the reactions of Group I and Group II elements, the behaviour of Group IV elements, and how atomic size, ionization energy, electronegativity and metallic character change across periods and down groups.
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