When temporary hard water containing \( \mathrm{Mg}\left(\mathrm{HC...

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When temporary hard water containing \( \mathrm{Mg}\left(\mathrm{HCO}_{3}\right)_{2} \) is boiled, the ppt. formed is of :
(a) \( \mathrm{MgCO}_{3} \)
(b) \( \mathrm{MgO} \)
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(c) \( \mathrm{Mg}(\mathrm{OH})_{2} \)
(d) None of these
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