A metal $X$ on heating in nitrogen gas gives $Y . Y$ on treatment with $\mathrm{H}_{2} \mathrm{O}$ gives a…

A metal $X$ on heating in nitrogen gas gives $Y . Y$ on treatment with $\mathrm{H}_{2} \mathrm{O}$ gives a colourless gas which when passed through $\mathrm{CuSO}_{4}$ solution gives a blue colour. $\mathrm{Y}$ is
  1. $\mathrm{Mg}\left(\mathrm{NO}_{3}ight)_{2}$
  2. $\mathrm{Mg}_{3} \mathrm{~N}_{2}$
  3. $\mathrm{NH}_{3}$
  4. $\mathrm{MgO}$

Asked in: JEE-TOPICTESTS-CHEMISTRY

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