Question
Name an acid which is present in baking powder.
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$\text{CaO}\ +\ \text{CO}_2\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ }\text{CaCO}_3$
$\text{Zn}\ +\ \text{HCl}\xrightarrow{\ \ \ \ \ \ \ \ \ \ \ }\text{ZnCl}_2\ +\ \text{H}_2$