MHT CET 2025 Chemistry question

Not in JEE Main or NEET syllabus

Which colour is developed to the solution when alkaline earth metals are dissolved in liquid ammonia?

(A)Crimson red
(B)Deep blue blackCorrect
(C)Orange
(D)Faint green

Answer: (B)

Solution

Alkali and alkaline earth metals dissolve in liquid ammonia to give deep blue solutions that are conducting and paramagnetic: (for a group 2 metal). The blue colour is due to excitation of the ammoniated electron,

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Question ID VK-102667