JEE Advance - Chemistry (1997 - No. 9)

Element A burns in nitrogen to give an ionic compound B. Compound B reacts with water to give C and D. A solution of C becomes 'milky' on bubbling carbon dioxide. Identify A, B, C and D.
A = Mg, B = Mg3N2, C = Mg(OH)2, D = NH3
A = Ca, B = Ca3N2, C = Ca(OH)2, D = NH3
A = Ba, B = Ba3N2, C = Ba(OH)2, D = NH3
A = Sr, B = Sr3N2, C = Sr(OH)2, D = NH3
A = K, B = K3N, C = KOH, D = NH3

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