Question

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

O2

H2

Cl2

CO2

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.