Question

On dissolving moderate amount of sodium metal in liquid ammonia at low temperature, which of the following does not occur?

• A. Blue coloured solution is obtained.
• B. Sodium ions are formed in solution.
• C. Liquid ammonia becomes a good conductor of electricity.
• D. Liquid ammonia remains diamagnetic.

Answer 1

Answer: (D)

Liquid ammonia remains diamagnetic.

When moderate amount of sodium metal is dissolved in liquid ammonia at low temperature, the solution becomes paramagnetic due to the presence of unpaired electrons. These unpaired electrons are obtained by the ionization of sodium atom to give sodium cation and electron.

Hence, option D is correct.