A) \[C{{a}^{2+}}\]
B) \[A{{l}^{+3}}\]
C) \[M{{g}^{2+}}\]
D) \[Z{{n}^{2+}}\]
Correct Answer: B
Solution :
\[N{{H}_{3}}\ +\ {{H}_{2}}O\ \to \ N{{H}_{4}}OH\] due to common ion effect \[NH_{4}^{+}\] ion concentration increases which leads to the precipitation of \[Al{{\left( OH \right)}_{3}}\].
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