sblock Elements - Result Question 45
55. 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 gas. Identify $A, B, C$ and $D$.
(1997, 3M)
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Solution:
$M$ can be either Ca or Ba but essentially not Mg because $\mathrm{Mg}(\mathrm{OH})_2$ is very sparingly soluble in water.
BETA
