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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.

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.

Grade:10

1 Answers

Jitender Pal
askIITians Faculty 365 Points
6 years ago
3M + N2 → M3N2
‘A’ ‘B’
M3N2 + 6H2O → 3M(OH)2 + 2NH3
‘B’ ‘C’ ‘D’
M(OH)2 + CO2 → MCO3 + H2O
‘C’ ‘D’
M may be either Ca or Ba
NOTE : It is not magnesium because Mg(OH)2 has very low solubility in water.
If we consider Ba as M then A is Ba, B is Ba3N2, C is Ba(OH)2, D is BaCO3.

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