Question

Which gas is produced when Mg(s) is added to HCl(aq)?O2H2Cl2CO2

Answer 1

The gas produced when the two combine is h2

Answer 2

Answer: $H_2$ or Hydrogen

Explanation:-

$Mg(s)+2HCl(aq)\rightarrow MgCl_2(aq)+H_2(g)$

This is a single replacement reaction in which magnesium replaces hydrogen from its aqueous solution. As magnesium is more reactive than hydrogen , it easily loses electrons to convert to $Mg^{2+}$ in $MgCl_2$ and $H^+$ in $HCl$ accepts electrons to form $H_2$.

Thus magnesium when dropped into an aqueous solution of $HCl$ releases hydrogen gas.