Which gas is produced when dilute hydrochloric acid is added to a reactive metal? Write the chemical reaction when iron reacts with dilute `H_(2)SO_(4).`

Explanation

Hydrogen gas is evolved dilute hydrochloric acid is added to a reactive metal.
When iron reacts with dilute `H_(2)SO_(4).` iron (II) sulphate with the evolution of hydrogen gas is formed.
`Fe(s)+H_(2)SO_(4)(aq)toFeSO_(4)(aq)+H_(2)(g)`