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Ammonia

Alkaline eart...

Question

Alkaline earth metals dissolve in liquid ammonia to form bright blue coloured solutions in dilution because of

A

Solvated ions

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B

Solvated electrons

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C

unsolvated ions

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D

unsolvated electrons

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Solution

The correct option is B
Solvated electrons

Like alkali metals, alkaline earth metals also dissolve in liquid ammonia to form coloured solutions. Dilute solutions are bright blue in colour due to solvated electrons.

$M + (x + 2 y) N H_{3} \to [M (N H_{3})_{x}]^{2 +} + 2 [e^{-} (N H_{3})_{y}]^{-}$

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Similar questions

Q. Assertion :Alkali metals dissolves in liquid ammonia and produce solvated cations and solvated electrons. Reason: The concentrated solutions of alkali metals in liquid ammonia is bronze coloured.

Q. Choose the correct answer form the alternatives given.
When alkaline earth metals dissolve in ammonia, they form coloured solution like alkali metals . Which of the following observations regarding the reaction are correct?
(i) Dilute solution are bright blue in colour due to solvated electrons.
(ii) These solutions decompose to form amides and hydrogen.
(iii) From this solution the ammoniates

[M (N H_{3})_{6}]^{2 +}

can be recovered by evaporation.

Q. Statement-1 : Alkali metals dissolve in liquid ammonia to give blue solutions.

Statement-2 : Alkali metals in liquid ammonia give solvated species of the type $[M (N H_{3})_{n}]^{+}$ (M =alkali metals).

Q. Assertion :Alkali metals dissolves in liquid ammonia to give blue solution Reason: Alkali metals in liquid ammonia give solvated species of the type

[M (N H_{3})_{n}]^{+}

M =

alkali metals).

Q. "Alkali metals dissolve in liquid ammonia to give green coloured solutions which upon standing slowly liberate

H_{2}

. The green colour of metal-ammonia solutions is due to the presence of solvated electrons."
Answer whether the above statement is true or false.
If true enter 1, else enter 0.

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