A certain metal M is used to prepare an antac | vedclass

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(C) Magnesium $(Mg)$ is used to prepare milk of magnesia,which is a suspension of $Mg(OH)_2$ in water and acts as an antacid to treat acidity.When $Mg

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$Mg$

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(C) Magnesium $(Mg)$ is used to prepare milk of magnesia,which is a suspension of $Mg(OH)_2$ in water and acts as an antacid to treat acidity.When $Mg$ catches fire,it reacts with $CO_2$ to form $MgO$ and $C$ $(2Mg + CO_2 \rightarrow 2MgO + C)$,meaning $CO_2$ cannot be used to extinguish a magnesium fire.Therefore,the metal $M$ is $Mg$.

$A$ certain metal $M$ is used to prepare an antacid,which is used as a medicine for acidity. This metal accidentally catches fire,which cannot be extinguished by using $CO_2$ based extinguishers. The metal $M$ is

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