Question

Which of following statements is not true regarding an alkali metal in a solution of $N{H}_3$?

• A. Blue colouration happens due to ammoniated electrons
• B. Blue colour changes to bronze, on dilution due to the formation of metal clusters
• C. Increasing the concentration of the alkali metal makes the solution less paramagnetic due to electron-electron pairing
• D. On heating, blue colour disappears due to formation of a metal amide and $H_2$ gas

Answer 1

The correct option is B Blue colour changes to bronze, on dilution due to the formation of metal clusters

Blue coloured solution becomes bronze coloured by increasing the concentration due to the formation of metal clusters.