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The pair whose both species are used in antiacid medicinal preparation is
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Verified Answer
The correct answer is:
$\mathrm{NaHCO}_3$ and $\mathrm{Mg}(\mathrm{OH})_2$
Intestine is acidic due to formation of $\mathrm{HCl}$ during digestion. Excessive acidity in the intestine creates problem of intestinal ulcer, gastric reflux and oesophagitis. The compound which reduced or neutralise acidity are called antacids.
$$
\begin{aligned}
& \mathrm{NaHCO}_3+\mathrm{HCl} \rightarrow \mathrm{NaCl}+\mathrm{H}_2 \mathrm{O}+\mathrm{CO}_2 \\
& \mathrm{Mg}(\mathrm{OH})_2+2 \mathrm{HCl} \rightarrow \mathrm{MgCl}_2+2 \mathrm{H}_2 \mathrm{O}
\end{aligned}
$$
$$
\begin{aligned}
& \mathrm{NaHCO}_3+\mathrm{HCl} \rightarrow \mathrm{NaCl}+\mathrm{H}_2 \mathrm{O}+\mathrm{CO}_2 \\
& \mathrm{Mg}(\mathrm{OH})_2+2 \mathrm{HCl} \rightarrow \mathrm{MgCl}_2+2 \mathrm{H}_2 \mathrm{O}
\end{aligned}
$$
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