Chemistry - s Block Elements Question with Solution | TestHub

$\mathrm{Mg}+{\mathrm{N}}_2\to {\mathrm{Mg}}_3{\mathrm{N}}_2\underset{\mathrm{moist}}{\overset{{\mathrm{H}}_2\mathrm{O}}{\to }}\mathrm{Mg}\left({\mathrm{OH}}_2\right)+{\mathrm{NH}}_3$

$\mathrm{Ca}+{\mathrm{N}}_2\to {\mathrm{Ca}}_3{\mathrm{N}}_2\underset{\mathrm{moist}}{\overset{{\mathrm{H}}_2\mathrm{O}}{\to }}\mathrm{Ca}{\left(\mathrm{OH}\right)}_2+{\mathrm{NH}}_3$

$\mathrm{Li}+{\mathrm{N}}_2\to {\mathrm{Li}}_3\mathrm{N}\underset{\mathrm{moist}}{\overset{{\mathrm{H}}_2\mathrm{O}}{\to }}\mathrm{LiOH}+{\mathrm{NH}}_3$

$\mathrm{K}+{\mathrm{N}}_2\to$no reaction
$\mathrm{N}\mathrm{a}+{\mathrm{N}}_2\to$no reaction
Hence, Sodium and Potassium do not give smell of ammonia.