Question

Calcium burns in nitrogen a white solid which sufficient water to produce a gas (A) and an alkaline solution. The solution o nexposure to air produces a solid layer of (B) on the surface. Identify the compound (A) and (B).

Answer 1

The chemical reaction involved as follows:
`3Ca+N_(2) overset("Heat")to underset("Cal.Nitrite")(Ca_(3)N_(2)),+6H_(2)O to underset("alkaline")(3Ca(OH)_(2))+underset(A)(2NH_(3))`
`Ca(OH)_(2)+CO_(2)("air")to underset("Cal. carbonate")(CaCO_(3))+underset(A)(H_(2)O)`