Which of the following statement(s) is/are true regarding a highly pure dilute solution of sodium in liquid ammonia?

It shows blue colour

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

It exhibits electrical conductivity

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Reaction to produce sodium amide can happen photochemically

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

It produces hydrogen gas on leaving it undisturbed for some time

Right on! Give the BNAT exam to get a 100% scholarship for BYJUS courses

Open in App

Solution

The correct option is D It produces hydrogen gas on leaving it undisturbed for some time
$N a + (x + y) N H_{3} \to [N a (N H_{3})_{x}]^{+} + [e (N H_{3})_{y}]^{-}$
a) Blue colour is due to ammoniated electrons which absorbs light in the visible region.
b) It conducts electricity due to the presence of ammoniated electrons.
c) The reaction for formation of amide : $N a^{+} + e^{-} + N H_{3} \to N a N H_{2} + \frac{1}{2} H_{2}$
d) $H_{2}$ gas is produced when solution is left standing for some time
All the options are correct.

Suggest Corrections