1.

Which of the following statements is/are true for the solutions of alkali metals and alkaline earth metals in ammonia (l) ?

Answer»

Concentrated solutions of alkali metals in ammonia are copper bronzed COLOURED and have a metallic lusture
Dilute solutions of alkaline earth metals are deep blue-black in colour due to the spectrum from the solvated electron
Concentrated solutions of the alkaline earth metals in ammonia are bronze coloured
Evaporation of the ammonia from solutions of alkali metals YIELDS the METAL , but with alkaline earth metals evaporation of ammonia gives hexammoniaes of the metals.

Solution :(A)Due to the formation of metal ION clusters
(B)`M+(x+y)NH_3toM^(+)(NH_3)_x + e^(-)(NH_3)_y`
(C ) due to the formation of metal clusters.
(D)`M(NH_3)_6 to` true STATEMENT


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