The blue colour of alkali and alkaline earth metals in liquid NH₃ is due to:
Correct answer: B. Ammoniated electrons
- A. Ammoniated complex cation
- B. Ammoniated electrons
- C. d-d transition
- D. Both (a) & (b)
Explanation
When alkali or alkaline earth metals dissolve in liquid ammonia, they release their valence electrons, which become solvated by the ammonia molecules. These "ammoniated electrons" are responsible for the solution's strong reducing properties and its characteristic deep blue color.
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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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