Question

Choose the incorrect statement regarding alkali in liquid ammonia solution

• A. On concentrating the solution, it gives copper bronze color
• B. Increasing concentration decreases the conductivity of solution
• C. Increasing concentration forms metal ion clusters
• D. None of the above

Answer 1

The correct option is D None of the above

Alkali metal dissolve in liquid ammonia to form deep blue solution which has free electrons or ammoniated electrons.
On increasing its concentration, they group together and form metal ion clusters where the opposite spin electrons associate to form diamagnetic electron pairs. This will reduce the conductivity of the solution and changes the colour of solution to copper-broze colour.
Hence, all the given statements are correct.