NEET2003Chemistrys Block ElementsActual
On dissolving moderate amount of sodium metal in liquid NH ₃ at low temperature, which one of the following does not occur?
Options
- ABlue coloured solution is obtained.
- BNa ⁺ ions are formed in the solution.
- CLiquid NH ₃ becomes good conductor of electricity.
- DLiquid ammonia remains diamagnetic.
Correct answer
D. Liquid ammonia remains diamagnetic.
Step-by-step solution
The alkali metals dissolve in liquid ammonia without evolution of hydrogen. The colour of the dilute solution is blue and are paramagnetic in nature. M M⁺ (in liquid ammonia) +e⁻ (ammoniated) M+(x+y) NH ₃ [M ( NH ₃ )_x ]⁺+e⁻ ( NH ₃ )_y solvated electron