A) \[MgC{{O}_{3}}\]
B) MgO
C) \[Mg{{(OH)}_{2}}\]
D) None of these
Correct Answer: C
Solution :
\[Mg{{(OH)}_{2}}\] is less soluble than \[MgC{{O}_{3}}\]. On boiling temporary hard water containing \[M{{g}^{+2}}\] ions, the ppt. obtained is of \[Mg{{(OH)}_{2}}\] are not that of \[MgC{{O}_{3}}\].
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