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  • Which of the following alkali metal(s) is paramagnetic in liquid  with low con

Which of the following alkali metal(s) is paramagnetic in liquid \mathrm{NH_{3}} with low concentration? 

Option: 1

Na


Option: 2

K


Option: 3

Cs


Option: 4

All of the above


Answers (1)

best_answer

Alkali metals dissolve in liquid ammonia to give blue colour solution because they have low ionisation energy. The solution is paramagnetic due to the presence of free or ammoniated electrons

\mathrm{M}+(\mathrm{x}+\mathrm{y}) \mathrm{NH}_3 \rightarrow\left[\mathrm{M}\left(\mathrm{NH}_3\right) _\mathrm{x}\right]^{+}+\left[\mathrm{e}\left(\mathrm{NH}_3\right) _\mathrm{y}\right]^{-}

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Gunjita

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