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Electrical Properties of Colloids

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Question

Solution of alkali metals in liquid ammonia conducts electricity due to the presence of solvated electrons.
If true enter 1,if false enter 0.

A

1

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B

0

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C

explanation is wrong

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D

Liquid ammonia not conduct electricity

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Solution

The correct option is A 1
Solution of alkali metals in liquid ammonia conducts electricity due to the presence of solvated electrons. Ammoniated electrons are present in the cavities formed by the electronic polarization between the electrons and ammonia molecules.Due to this, the metal solution occupies larger volume and has lower density than solvent itself.

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Similar questions

Q. "Sodium metal when dissolved in ammonia conducts electricity because of solvated electrons."
Answer whether the above statement is true or false.
If true enter 1, else enter 0.

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.

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. Solutions of alkali metals in liquid ammonia at

- 33^{o} C

conduct electricity without chemical reaction at the electrodes. Hence, conductivity should :

All alkali metals dissolve in anhydrous liquid ammonia to give a blue color solution. It is the ammoniated electron which is responsible for the blue color of the solution, and the electrical conductivity is due to ammoniated cation,

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

as well as the ammoniated electron,

[e (N H_{3})_{y}]^{-}

, values of x and y depend on the extent of solvation by

N H_{3}

. Dilute solutions are paramagnetic due to free ammoniated electrons.

What happens if alkali metals are allowed to react with concentrated liquid ammonia?

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