Alkaline earth metals produce bright blue colour when they are dissolved in liquid ammonia. It is due to:
Correct answer: D. absorption of light by the solvated electrons.
- A. d-d transition in the solvated metal ion
- B. presence of unpaired electron
- C. charge - transfer transition
- D. absorption of light by the solvated electrons.
Explanation
Alkaline earth metals produce a bright blue color when dissolved in liquid ammonia due to the presence of solvated electrons. These solvated electrons absorb light in the visible region of the spectrum and emit light in the blue region, resulting in the blue color observed. The correct answer is the absorption of light by the solvated electrons. The other options are incorrect because they do not accurately describe the phenomenon responsible for the bright 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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