The pair whose both species are used in antiacid medicinal...

The pair whose both species are used in antiacid medicinal preparation is

Options

A $\mathrm{NaHCO}_3$ and $\mathrm{Mg}(\mathrm{OH})_2$
B\mathrm{Na}_2 \mathrm{CO}_3 $and$ \mathrm{Ca}\left(\mathrm{HCO}_3\right)_2
C $\mathrm{Ca}$ \left(\mathrm{HCO}_3\right)_2 $and$ \mathrm{Mg}(\mathrm{OH})_2
D $\mathrm{Ca}(\mathrm{OH})_2$ and $\mathrm{NaHCO}_3$ .

Correct answer

A. $\mathrm{NaHCO}_3$ and $\mathrm{Mg}(\mathrm{OH})_2$

Step-by-step solution

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}

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