Redox Reactions And Electrochemistry Ques 485
Question: When sodium metal is dissolved in liquid ammonia, blue colour solution is formed. The blue colour is due to [NCERT 1981]
Options:
A) Solvated $ N{{a}^{+}} $ ions
B) Solvated electrons
C) Solvated $ NH_2^{-} $ ions
D) Solvated protons
Show Answer
Answer:
Correct Answer: B
Solution:
When sodium metal is dissolved in liquid ammonia to form coloured solution. Dilute solutions are bright blue in colour due to the presence of solvated electrons.
$ Na+(x+y)NH_3\to {{[Na{{(NH_3)} _{x}}]}^{+}}+\underset{\text{Blue Colour}}{\mathop{{{[e{{(NH_3)} _{y}}]}^{-}}}}, $
